LED bus stop lighting systems are particularly suitable for rural areas?

After nearly two years of the pilot, Hangzhou Xiaoshan region currently has 54 rural bus stop using solar power led lighting system. Xiaoshan passenger transport infrastructure headquarters confirmed that this lighting system is the latest in the next year before the Spring Festival, the region has completed the transformation of the rural bus stop in use.

Lighting system especially suitable for rural areas

It is reported that rural bus stop, no lighting, it is prone to the site to be touched or been touched Yexing Ren and other accidents. To some extent, bus stops lighting lighting even more important than the road. However, due to its location in rural areas, rural bus stop, take more trouble with the municipal people's power, then the cost of electricity is also high.

Back in September 2008, Samick line Xinyi village bus stop on both sides of roads, installation of LED lighting systems, this is my first trial area LED lighting system. This lighting system consists of solar power and low-carbon of LED lights. Main function is to use photovoltaic technology to convert solar energy into electricity. LED is a semiconductor light-emitting diode abbreviation. In the LED lighting systems, photovoltaic electricity will be stored in batteries, then the supply of LED lights, complete with its light emitting characteristics. This system, solar energy is completely clean, light-emitting diode is an environmentally friendly, energy saving, power efficient solid-state light sources. LED lighting is the next generation of new sources of energy and the perfect combination.

Xiaoshan passenger transport infrastructure Jin Wei, head of the command are said to use LED lighting in rural public transportation system not only solved the difficult problem of electrical connection sites, even more gratifying is that this system was originally designed for the 7th consecutive rainy days as usual to generate electricity. Last year, Xiaoshan nine consecutive rainy days, at night, bus stop lighting systems to work as usual.

Stops in each province costs 3000 yuan

Jin Wei calculations are to reporters, the original bus stop site uses the fluorescent lighting. A 8 m bus station, for example, to install fluorescent tubes is 30, each fluorescent lighting 10 hours per night, the bus stops a year in electricity (commercial electricity prices) needs to 4489.5 yuan.

Use of LED lighting systems, using solar power technology, no electricity costs. However, this system was the battery replaced once every three years, and to install security devices, this is a major expense. According to the staff, for this system is 12 volts, will not cause injuries to passengers.

According to reports, the half of the transit site uses LED lighting systems, electric lighting, the other half still received the same time lighting, LED fluorescent lamp night power consumption of only about 30%. Year, the use of LED lights to save electricity bus station is about 3,000 yuan.

It also is not fluorescent tube replacement cost. Fluorescent tube life is generally two to three years, the cost of each lamp to buy $ 8. The LED lamp life of 100,000 hours, according to the design for 20 years without replacement. LED Lights Lamp replacement cost is not generated by the number of pens.

The end of September there are 580 sites, "light"

In the early 54 pilot rural bus stop in New Street and Town have a pilot up to justice, each with 10, Puyang, eight, six Canton Town, temporary Town, Nga town Ning around town all four, wearing the village and town on the river 2.

It is understood that the end of September this year, 580 rural bus stops will be installed on the LED lighting system, until next year before the Spring Festival, the district soared to 600 rural bus stop, the cost savings will be considerable.

LED lighting achievement business according to the Blue Ocean Hotel

Currently the vast majority of hotels, both high-end hotel or an ordinary hotel, the use of Illumination Products are mostly fluorescent, incandescent, halogen and other traditional Illumination Products. To have a large space, diversified, high quality lighting requirements of the hotel, the traditional lighting technology certainly has a mature, stable, widely used and other advantages, but in lighting energy consumption is far from satisfactory. According to measurement, if LED Lighting (with appropriate control system), the hotel is expected to decrease energy consumption 50% to 70%, effectively reducing operating costs. In all walks of life to the green, environmental protection, energy conservation advocate environment, the use of the hotel LED For the transformation of the lighting system, is showing increasing interest.

Statistics show that China's future GDP8% ~ 10% annual growth is expected to bring the number of hotel rooms grew 12 percent in 2010, China Hotel Rooms to 552 million, hotel rooms total 2 million, is expected 5 to 7 years to grow to 5 million. China's hotel market is expected in 5 to 10 years over the United States. Thus, LED lighting market in the hotel industry a wide range of applications, the potential is huge. Hotel Lighting can seize this good opportunity, to rush the field in the indoor commercial lighting breakthrough LED business is critical, many companies have shown great enthusiasm.Philips Illumination Lin Liangqi Greater China general manager, said: "Hotel lighting is most closely with people's lives, one of the areas of lighting, with the sustainability of economic development and people's quality of life calls for a gradual increase, the development of lighting direction of the hotel is more energy efficient provide more varied experience. LED technology just to meet these needs, it also has broad prospects for development. "Cree said Tang Guoqing, general manager of China market, the hotel is concerned, the lighting system 24 hours on, If the application of LED light source, the energy saving effect will be very obvious. Hotel Lighting LED interior lighting is becoming a market breakthrough.

LED lamps for the hotel in terms of dress can also bring many benefits, not only save electricity, promote energy saving carbon more ideas, become a selling point to promote the hotel. This drives the domestic part of the hotel to speed up the pace of action for light: November 19, 2010 Shangri-La Hotel Dalian, light energy-saving projects start, phased installation of LED lights lamps, LED lamp, LED lighting, green lighting and other equipment; Shenzhen Airlines Hotel , Shanghai Pudong Shangri-La Hotel, on Haili Jia Hotel, Beijing Friendship Hotel, etc. are also being to the lobby, hallways, function rooms, etc. a lot of replacement LED lighting products. This Suzhou Liang Bingwen nanocrystalline photovoltaic chairman, said the hotel is in fact the concept of low-carbon environment to sell themselves, LED in this regard would be a better choice. Such as the Shangri-La Hotel, Dalian, said during the transformation of light, energy-saving rate is expected to reach 60%, the annual savings of nearly $ 1 million. Ye Hao is the hype really promote the concept of environmental protection worth mentioning, in the promotion of LED lighting application products, LED industry and hotel industry should be a win-win situation.

Lady's favourite: mirror LED light

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Lady may love this LED light with mirror. The front of this lamp is a desklamp but the back side of the light is mirror. Putting the light on beside cabinet, it can be used as LED desklamp when lighting, and turn it to backside it is a dresser mirror. 

The largest solar street light plant put into work

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In Wuxi, the largest solar street light plant has been completed and put into work on April, 19^th, 2011. The plant lie in Tailake New town in Wuxi, which adopt off-grid power generation and equipped with 192 Ps high efficiency monocrystalline silicon solar panel.

The plant utilize new sun-following tracking support which can change the direction of panel according to sunshine and it can absorb sunshine well, enhancing utility rate of luminous energy. The solar panel storage electricity power at day and distribute the power to solar LED street light at night. It was estimated that using this system can save electricity power 37960KW/h per year.

Kiran solar LED lights

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Kiran solar LED light

This solar led light designed by d.light group. On the condition of good light quality, the light is durable while applicable for all kind of climate. It could replace kerosene lamp which widely used in many remote areas where lacking in electric, light better/ safe and environment protection are its obviously features.

Designer stated, ligth's power will full if put the led panel, a part of solar cell, in the sun for 6-12 hours. And the full power solar led light be able to light 8 constant hours,which greatly beyond light user and led light supplier's expectation. In addition, the best one is that user can choose charging way leisurely: alternating current or solar.

Shantou company donated solar emergency system to Japan

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Since "3.11" Japan strong shock, especially after Nuclear leakage accident, the power shortage problem is urgently to be solved, and it had

 caused bad effect for local resident. It was learned, Guangdong kingkang glass technical Co., Ltd, a overseas Chinese company in Shantou city, Guangdong province, we may take the company as a LED street light manufacturer, has successfully developed a new solar emergency light system, which product contain Solar LED Street Lights, Solar LED Garden Lights, and so on. It was introduced that those products can absorb sun power and transfer them into electric energy. the electric energy not only be used for light, but also could support working of remote control and elevator. 

led lighting led to price competition and the nature of the product to the application According to statistics, global lighting electricity consumption accounts for about 19% of the total electricity consumption, a high proportion; in the LED industry in

According to statistics, global lighting electricity consumption accounts for about 19% of the total electricity consumption, a high proportion; in the LED suppliers in Taiwan has been a important role, especially into the lighting of the LED industry, faced a big obstacle is cost. Environmental awareness, the green energy into the moment with the school of economic development, LED low power there for the fact that gambling, and with the LED technology continues to evolve,LED LightingIn strong support of national government policies evolved.

Optimistic about the market potential of LED lighting, is also optimistic about the improved gross margin for 2011, the key to improving the product mix, but the high price of high-power LED is also off-season market prices before the drastic decline in one of the major product, with LED lighting is gradually to the general consumer market, people's livelihood, once to enter the home market, price competition, low margins will be difficult to avoid fate, but also becausePrice competitionIntense, soProductThe nature and application has been repeatedly ignored.

Observations on the use of cost, the current acquisition cost of LED lamps, though still high, but in fact to compare conversion will find the same efficiency of CFL and LED light fixtures, both procurement costs, LED lamps must be 3 times the cost of acquisition, but two kinds of lamp life, there are nearly three times the difference between saving CFL lamps with LED than almost doubled, with terms of lighting electricity consumption to calculate the total cost of ownership, irrespective of the lamp replacement labor costs, This down conversion, LED lamps although a higher initial purchase price, but still have a better long-term cost-effectiveness, and therefore a variety of lighting applications side of the application of technology integration capabilities and multi-way market in the future may become the most important key.

Implementation of LED, different import demand, based on the position of environmental protection and energy conservation demands of the application, but also to enhance the luminous efficiency of the end product. Way most applications, most focus on the economic benefits of LED energy-saving features, additional environmental demands is the implementation of such a source of additional benefits, LED Lights manufacturers are optimistic about the lighting revolution and competing investment opportunities.

Lighting Science Group's Products Supports Four U.S. Department of Energy Solar Decathlon 2011 Teams for the Competion

Lately, Four U.S. Department of Energy Solar Decathlon 2011 teams have announced to rely on Lighting Science Group’s lighting solutions for their solar home prototypes competing in final testing and judgment this fall.Professional Energy Solar website : http://www.topsolarsupplier.com

 
The four teams are Parsons The New School for Design and Stevens Institute of Technology, the University of Illinois at Urbana-Champaign, Old Dominion University and Hampton University, and Middlebury College .

According to the Parsons The New School for Design and Stevens Institute of Technology team, "The nature of the U.S. Department of Energy's Solar Decathlon competition and our partnership with Habitat for Humanity of Washington, D.C. charges the Empowerhouse design team to deliver the right amount of high quality lighting at the best value to a homebuilder and homeowner. It's reassuring to know that Lighting Science Group is an active participant in the Department of Energy's Lighting Facts program, and that Lighting Science Group provides a wide range of solid state lighting products for retrofit and new construction.  Lighting Science Group products are a natural fit for Empowerhouse."

These findings aren't isolated—independent tests show that the lumen (light) output of these Led bulbs is unrivaled—outperforming comparable products by 25-30%. In addition, the bulbs are more energy efficient than equivalent CFLs and contain no mercury, are "instant on", are completely recyclable, and offer outstanding light quality.

Professional LED lights website : http://www.topledsupplier.com

Samsung Electronics America Shows Four LED/LCD Displays at InfoComm 2011

Samsung Electronics America Shows Four LED/LCD Displays at InfoComm 2011

Samsung Electronics America Inc., has shown four new lines of Led/LCD commercial displays during InfoComm 2011 in Orlando, FL, June 15-17 and available through Samsung distributors and resellers in Q3 2011.
 
The four new lines including Samsung HE, ME, UE and UD Series incorporate LED-backlight technology that offers many benefits over traditional Cold Cathode Fluorescent Lamp backLighting.

With the ME and UE Series benefitting from a high 120Hz and 240Hz refresh rate, respectively, there is smoother scrolling text and reduced motion blur in digital signage messaging. With native contrast ratios of up to 5,000:1, the LED/LCD displays produce more realistic images.

Compared to conventional CCFL-backlit LCD displays, the technology allows for reduced energy consumption ranging from 30-50 percent. In addition, the displays deliver lower total cost of ownership by combining energy savings with reductions in carbon emissions.

More and more professional led lights Manufacturers information on the topledsupplier website.

Hollywood Fringe-sponsor ETC to Show Latest LED Lighting, June 23rd, ArtWorks Theatre

‘Being on the fringe’ can mean being on the cutting edge of creativity – out where the new happens. Entertainment-technology company ETC (Electronic Theatre Controls, Inc.) loves the fringe. It’s the sweet spot of innovation. This year ETC will not only help light up the stages of the Hollywood Fringe Festival with ETC equipment but also present their own show -- the “Layers of Light” Selador® Led lighting presentation. Open to the public but of extra interest to production people throughout the entertainment industry, this lightshow/product demonstration will be held at Fringe Central, in the ArtWorks Theatre, 6569 Santa Monica Boulevard, in Hollywood.

There will be three show times for the “Layers of Light” demonstrations on Thursday, June 23rd, 2011: 10:00am, 11:30am, and 1:00pm. ETC encourages people to drop in any time between 10:00am-3:00pm to see the new ETC Lighting gear on display, ask questions, and request further demos.

ETC West’s field-project coordinators David Hilton and Lowell Olcott will present the scene-stealing newest-of-the-new ETC lighting fixtures: Desire™ Led luminaires.

An added attraction: “Layers of Light” attendees will have the chance to win an ETC Source Four® PAR™ light fixture with lens kit. ETC will give away three Source Four PARs via random drawings during show times. Anyone who signs up for a ‘MyETC’ account (via www.etcconnect.com) will be entered into the drawing. They must be present at one of the “Layers of Light” Fringe shows to win.

Dave McKeever, Producing Director of The Hollywood Fringe Festival appreciates the passionate involvement of sponsors like ETC: "We are so pleased to be working with the premier provider of lighting instruments and control systems. Our participants and I are amazed at the diversity of lighting possibilities offered by these Selador LED instruments. Our partnership with ETC is truly making the Fringe a brighter place."

As an aside program note: ETC is especially proud to be on the fringe with a Fringe artist in its own family. Playwright Catherine Pelonero, whose comedy Another Effing Family Drama will show June 11, 16, 18, 25, and 26 at Fringe Central, is employed with the company.

Besides the popular Selador and Source Four lines, ETC entertainment products also include the Eos® and Congo® lighting-control console lines, Sensor®  dimming systems, and ETC Rigging™.

Source:led lights manufacturers & suppliers Anern ltd.

Cree Ups the Performance of XLamp® MX-6 LEDs—Includes ENERGY STAR™ LM-80 Data

Cree, Inc. (Nasdaq: CREE) has further simplified indoor Led fixture design with its newly optimized XLamp® MX-6 LEDs, which feature higher flux options, new, longer lifetime estimates and higher CRI options. Cree has also completed LM-80 testing on MX-6 LEDs, which can enable quicker time to market for manufacturers designing ENERGY STAR®-rated fixtures.

“These MX-6 LED improvements are proof of Cree’s commitment to enabling our customers’ success in Led lighting,” said Paul Thieken, Cree director of marketing, LED components. “By delivering high efficacy, uniform light output and extended lifetime, as well as completed LM-80 data, MX-6 LEDs are an ideal choice for manufacturers pursuing ENERGY STAR®-qualified indoor LED fixtures such as cove, wall washing, under-cabinet or desk lamps.”

XLamp MX-6 LEDs are now available in higher flux order codes offering light output of up to 122 lumens at 300 mA in cool white (6000K) and up to 100 lumens at 300 mA in warm white (3000 K). MX-6 LEDs are also available with 80 CRI minimum in warm white (2600 K – 4300 K) for both standard and high-voltage configurations.

Based on LM-80 extrapolations and under normal operating conditions, MX-6 LEDs can provide an L70 lifetime of more than 150,000 hours using ENERGY STAR lifetime prediction methods. If used 24-hours-a-day, that equates to more than 17 years.

XLamp MX-6 LEDs with 80-CRI minimum or higher flux bins are also available in sample quantities immediately and production quantities with standard lead times.

China Public LED Lighting Summit 2011

China Public Lighting Summit 2011(CPLS2011), as one of the most well-known event of the Lighting industry in China, is the unique international event on PUBLIC LIGHTING. CPLS network brings together cities and lighting professionals engaged in using light as a major tool for urban, social and economic development, with a concern for sustainability and environmental issues. CPLS2011 focuses on promoting the technologies and applications of energy efficient lighting solution. This event can help participants grasp new market trend and future opportunities. CPLS2011 is dedicated in providing cooperative opportunities for exhibitors, visitors and conference participants to make multi-win development.

CPLS2010 was held successfully and was highly appreciated by a larger number of experts and scholars .We invited domestic and international professionals to make wonderful speeches, including the representative of China Municipal Engineering Association, City Illumination Committee of China Municipal Engineering, Street Lamp Management and Monitoring Center (Beijing,Shanghai Changzhou), Association, European Lamp Companies Federation (ELC),CIE in Finland, Lighting Council New Zealand, The Professional Lighting & Sound Association of Germany,Institution of Lighting Engineers,Japan Electric Lamp Manufacturers Association, Lighting Unit in Aalto University,Optoelectronics Industry Development Association, Lighting Association of Singapore,Indian Society of Lighting Engineers Association, OSRAM CHINA LIGHTING LTD.,Littelfuse , representative of Philips from Singapore.

For high-power solutions for power failure

At present the industry's high-power lamps have been a power supply problems. Because the street's unique environment requires power, high efficiency, small size, light weight, waterproof, and several other features. Makes the high rate of power failure lights, and the higher power, the higher the failure rate!

Some of the current industry solution is:

         1. In the high power a few lights on the small power supply, so that the heat dispersion, the temperature of a single power supply is reduced, thereby reducing the failure rate of power supply. However, because the volume and appearance of the alignment, the customer is generally difficult to accept.

         2. using solid capacitors, where the most common failure is that the capacitor, and capacitor failure due to thermal breakdown. Solid capacitors in this area but does have the advantage of greater cost-high! But no obvious improvement!

3. seeking superior quality electronic components to increase power efficiency. This may seem simple, but difficult to achieve the short term!

4. increase the cooling fan

Analysis

Switching power supply is actually a very mature product, in the widely used home appliances and many other fields. And street power than just a different application environment. In particular the need for street lights to increase the water!Through testing, the power in the street, because plastic irrigation, so that the heat inside the export and distribution of not timely. Makes the 150W power supply inside temperature is 80 ℃, and the 300W power supply inside temperature is 100.5 ℃. This is not measured heat production components and the temperature of hot concentrated area! Waterproof and heat is very contradictory, so that the power to face a major street conflicts - heat. If we can maintain the temperature of lamp power to 60 ℃ or so, it will, and is as stable and durable home appliances!

Problems

Since the street is the main contradiction power failure heat, then we should seize this idea contradiction:

1.        to improve the wiring inside the power supply in the irrigation plastic, because the thermal conductivity of the limited capacity of sealant. Therefore need to consider when wiring in the wiring and cooling problems. Capacitance is relatively weak, but do not produce their own heat. The main components are heat FET and transformer, but the two heat capacity is good, in theory at least higher than 40 ℃ or so. So we need to design the wiring capacitance components away from the heat, even with the heat protection (good capacitors do not produce their own heat.) The major components of the heat near the shell, is conducive to heat dissipation. This can guarantee the basic power of the "hot" issues are resolved!

2.        oil-cooling heat dissipation, which is a simple method is to soak in all the electronic components inside the insulating oil, the use of high thermal conductivity of liquid capacity of the convection of heat conduction to the outer shell heat. This method of direct and effective! But there are structural difficulties, such as seals,,, but if the design can still be a good solution!

Conclusion

Although all the questions may involve a number of areas, but as long as the grasp the principal contradiction, the problem will be solved! Lamp power supply problem is multifaceted, involving the quality of electronic components, circuit design, the performance of plastic irrigation, housing cooling capacity, waterproof design, but only one principal contradiction - heat.

Indoor Gardening With The UFO LED Grow Light

Indoor Gardening With The UFO LED Grow Light

LED Grow lighting is a fairly recent developing in indoor gardening lighting.  It takes the power of tiny LED lights and combines and configures them in such a way as to produce indoor light perfectly suited for growing plants.  There are many types of indoor gardening applications where the UFO LED grow light can be beneficial.

Seed Starting and the UFO LED Grow Light

Many different types of seeds benefit from the application of appropriate light during the seed germination process.  Seeds such as lettuce, mullein and evening primrose achieve germination only when light is applied.  If they are outside in the garden, they rely on natural sunlight, but if indoors, it is up to the gardener to apply the light they need.  The UFO LED Grow Lights is suited to this purpose, because it not only offers the bright light needed for germination, but in the case of lettuce, which requires cooler soil and air temperatures for germination to occur, the LED UFO grow light produces no heat.  This allows you to more easily control the air and soil temperatures so you can achieve the best germination rate for your seed.  You can do this without the added expense of fans and vents, which are typically used with other types of lighting.

Seedling To Mature Plant Growth and UFO LED Lights

The UFO LED grow light is especially popular with indoor gardening enthusiasts because it produces a very bright light.  When compared with other commonly used grow lights, such as high pressure sodium grow lamps, the UFO LED lighting typically puts out a more intense light than a 400 watt HPS grow bulb.  It is especially important that seedlings receive very bright light as they are growing, because without it they will develop weak, spindly stems as they struggle to reach the little light that is available. 

It is also important to understand the basics of color temperature and how that applies to plant growth and UFO LED lighting.  Color temperature is measured in kelvins, notated as K.  Lower color temperatures, in the 2200-2300K range are seen as warm colors like red and orange.  These are the colors that plants need for flower and fruit production.  Higher color temperatures in the 6000-6500K range are seen as cool colors such as blue, and these are suitable for vegetative growth.  Therefore, you want higher color temperature for seedlings, and lower color temperature for mature plants that you are trying to get to produce flowers or fruits.

The LED UFO grow light is ideal for all phases of plant growth because it utilizes only the light spectrum required by plants.  UFO LED lights also save money because they use no wasted light spectrums, such as green light.  UFO LED lights use less power than other common grow lights, and UFO LED lighting creates less pollution as well.  Finally, the LED UFO grow light has a long life of 80,000 or more useful hours.

Why Choose LED Grow Lights?

Why Choose LED Grow Lights
LED Grow Lights have increased in popularity during the last few years and have turned into a safe option to traditional Grow Lights. LED lighting is a good source of artificial light for your plants, and they're Eco friendly too. They may also offer your wallet a rest mainly because LED Grow Lights are so long-lasting and energy efficient. The first significant benefit of LED Lighting is the fact that they are so Eco friendly and efficient. Normal incandescent lighting contains mercury which is harmful to humans and also the environment. Mercury is among the worst pollutants and can cause an great deal of harm to humans, wildlife and plant-life. With LED lighting, that danger is avoided due to the fact there is no mercury, or any other heavy metals, contained within the lights. With all the talk about the environment suffering at the hands of humans, using an Eco friendly and energy saving LED Grow Light will help reduce your footprint on the environment. Grow lights like HPS and MH tend to run incredibly hot after only a couple of hours which is why a temperature control system is required if one wants to ensure the well being of the plants. Also, cooling systems are fairly expensive and not everybody knows the right way to operate them. That being said, LED Grow lights are extremely advantageous in this respect as they emit incredibly little heat. This indicates that even if they've been left on for several days, it'll be OK for you to touch them without burning your hand. And because a cooling system just isn't required, you can save a good deal of money on your electric bills if you make the switch to LED.

The second significant benefit of LED Grow Lights are that they are really long lasting and consume really very little power when compared to an HID system. It is estimated that the average LED Grow Light has roughly a 35,000-50,000 hour lifespan. Whenever you compare this to the 1,000-2,000 hour lifespan of incandescent lighting and you'll see just how much cash you will being throwing away when you choose to use standard Grow Lights. Why is the lifespan of LED lighting so high? Unlike conventional incandescent lighting, LED lights don't contain any filaments that can overheat and trigger the light to eventually burn out. Not only is this quite beneficial for local landfills, because it keeps metal halide lights out, but it also keeps money in your pocket. A third key benefit of LED Lighting is that the light they emit is designed to replicate specific wavelengths which are near the peak of the plants chlorophyll absorption levels. It's this targeted spectrum which help plants grow far more efficiently and produce more. Young plants or sprouts need to have light inside the blue spectrum to be able to grow. Adult plants which are ready to reproduce and bloom and/or fruit, require light a little more inside the red spectrum. So the bottom line is, while LED Grow Lights have not been around as long as standard HID, they're pound for pound the best choice for your money.

How the LED Grow Light Has Changed Indoor Grow Lighting

How the LED Grow Light Has Changed Indoor Grow Lighting

All plants need three things to grow and thrive, and they are light, food and water. Light is extremely important, because without appropriate light, the plant will not be able to perform photosynthesis and will not be able to create chemical energy, otherwise known as food, which it uses for growth. With this in mind, bright light is crucial for indoor gardening at all levels, whether for an avid home gardener or a commercial greenhouse grower. Indoor gardeners are enthusiastic about the new grow light called the  LED for many reasons.

The  LED grow lights will provide your plants with all of the light they need for excellent growth. Plants need more light from certain spectrums depending on their stage of growth. Plant grow lights come in different color temperatures, ranging from blues at one end of the spectrum and reds on the opposite end. Young plants need light in the blue spectrum for good growth, while mature plants that you want to produce fruit or flowers will thrive with light in the red and orange spectrum.

The  LED is unique in that you can control the red and blue light color temperature spectrums independently. This means that you can have a light that produces more red spectrum when needed, and more blue spectrum as you choose, and all from the same lighting unit. The grow light also offers six custom enhanced spectrums of LED light. This is unique in the world of LED grow lights.

The  LED grow lights is also highly cost efficient. The  LED, which are 270-watt LED grow lights, run on a fraction of the electricity needed to run 1,000-watt high intensity discharge grow lamps. The amazing  LED, however, produces three times the brightness of ordinary LED lights. This is a powerful phenomenon that results in luxuriant growth in plants grown with these types of LED grow lights.

Another convenient aspect of the  LED grow light is the wide coverage this grow light can achieve. Plants in a five foot square growing space will receive ample light from the  LED. Seven circuit boards within these lights offer the capability of light projection at several different angles to achieve this result.

Many gardeners find that ordinary grow lights tend to run hot. This means you have to purchase products to cool them so that they do not overheat. This is not the case with the  LED grow light. The  LED comes with built-in fans, keeping the unit cool while at the same time saving you the ordinary expense of air-cooled reflectors and ducting.

LED Grow Light with Super Harvest Colors (NASA Red and Blue)

LED Grow Light with Super Harvest Colors (NASA Red and Blue). Introducing the L.E.D. Grow Light, a new revolution in the way we grow indoors, providing abundant harvests with a lower energy bill.

For the budding hobbyists, this LED Grow Light produces the best light wave spectrum to stimulate maximum plant growth. The CVHZ-G33 LED grow lights are designed to stimulate indoor and greenhouse plants by providing light in the frequencies that plants primarily use for critical biological processes. The NASA space program has proven that blue and red color LED's help to optimize plant growth and promotes plant health from the specific parts of the light spectrum in two ways: it enhances the natural process of photosynthesis and saves energy by not generating light in colors that plants do not use.

In this day and age, it is important to reduce waste in terms of heat and light. Conventional grow light systems run hot and use a lot of energy, this excess radiated heat output adds to the cost to cool your home or business. Producing much less heat than conventional grow lights, this energy-efficient LED Grow Light produces almost no appreciable heat and uses 1/3 the energy of a fluorescent system. Delivering only the light your plants need, your running costs will be reduced by minimizing waste, enabling you to save money on electricity.

These practical LED Grow Lights also have the benefit of being silent and unobtrusive. Lightweight with a flat base and 4 corner holes, this LED Grow Light can be hung wherever you want for maximum benefit. This is the ideal Grow Light for plant enthusiasts and plant breeders everywhere, so start spending more time enjoying the fruits of your labor with these incredible Grow Lights! Order yours today as a sample to see how good it really works and then buy in bulk to optimize your cost savings!

Revolutionary Way To Grow Plants By Using Led Grow Lights

Revolutionary Way To Grow Plants By Using Led Grow Lights

A light emitting diode better known as LED is a semiconductor light. These devices are used for lighting. These LEDs have many advantages such as low consumption of energy, small size, long life, immense durability, and dependability.

The advancement of science has permitted the production of cheap bright LED Grow Lights, which emit the wavelength of light similar to chlorophyll absorption limit. These are also called LED growing lights which are helpful for indoor plant growers. The indoor LED grow lights come in four different LED types to strike all four chlorophyll peaks.

These LED grow Lights are very helpful for gardening indoors, plant propagation, and for the production of food. These LED plant lights are helpful in many ways including:

*Lowering the cost: The LED grow light help in saving money compared to the ordinary bulb as it uses only six watt or nine watts of energy.

*Longer self-life: The expected self-life LED grow lights are twelve to eighteen years.

*Less wastage of heat: Even after hours of operation such lights are just warm to touch.

*Light weight: The LED flowering grow lights weigh less than a pound.

These LED planting grow lights are less fragile and pose fewer hazards to the environment.

If you want to have an indoor garden even when living in a place like Alaska or any extremity during the winter months, you can now have your dream garden blooming with the help of these LED grow Lights. You can also grow pepper, tomatoes, basils, roses, and plenty of other food producing plants all over the year.

Three Spectrums Of Light Which Can Be Used To Grow Plants:

These LED grow lights are available in blue, red, and a combination of blue and red, which can be used according to the growth cycle of the plant.

*Blue light: It is used for young seedlings and vegetables.
*Red light: It is used for leafy plants.
*Dual light: It can be used for mid-cycle plants.

These lights are a very good alternate when wanting to grow plants indoor without any botheration. They help a cold winter day to glow by growing plants inside. Such lights keep turning on and off everyday imitating as day and night. That is why they are also called as the intelligent LED lights.

Important Things To Keep In Mind When Buying LED Grow Lights:

Never be attracted to products which are cheap or where the quality of the product is compromised.

Always take into consideration the following points for your protection.

*Beware of any type of hidden cost.
*Don't make advance payments unless very sure of the company.
*Don't blindly follow what the site says.
*Look for quality of the product and its guarantee.
*Buy a licensed product.

ALL LED Grow Lights useful information

"LED Grow Lights Useful Information Guide" is meant to inform you what some of the more popular misconceptions are in regards to LED Grow Lights and what is factual vs. what sounds good to the general public.

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1)  The LED wattage is of particular importance as many companies are using the 2W, 3W, 5W, 6W or even higher wattage LEDs and claiming that they are more powerful and thus creating a more productive flowering cycle.  The truth is that there is no more efficient LED than the High-Intensity 1W 10mm Diode.  The reason being is the input vs. output ratio drops off dramatically the higher wattage LED that is used, and the way you know this to be true is if you test your light with a voltage meter to see the actual power consumption of your light.  Our 90W UFO with all 1W Diodes draws between 80-85 watts depending on temperature, where a 90W UFO led lights comprised of all 3W Diodes will draw between 55-60 watts of consumption power.  The point is that it sounds good to hear a higher wattage LED being used, but the truth of the matter is that you are actually losing your overall power output by using these inefficient higher-wattage LEDs.

2)  The Brand name of the LEDs being used in lights is a popular marketing tool to advertise such brand names as Cree or Bridgelux.  The truth is that both Cree and Bridgelux both specialize in producing high Lumen LEDs that are used for commercial lighting like street lighting or commercial buildings.  Horticulture lighting is a specialty field and very few manufacturers in the world that produce LEDs lights that are appropriate for horticultural purposes.

3)  LED Lights that are significantly cheaper than other lights should raise a red flag right away.  The truth is that to use a precision LED that is an authentic 10mm (High-Intensity) 1W Diode is expensive, and to get around this cost issue, some companies use the 5mm diodes, which are significantly less powerful than the 10mm diodes, thus resulting in a poor performance.  There are a number of ways to skimp on the cost of manufacturing a quality LED Grow Light that produces results that are equivalent to HPS lighting, so beware of  low-priced LED Lights that sound too good to be true.

4)  The number of "Bands of Frequencies" used is of significant importance to photosynthetic activity.  There are 3 photosynthetic processes that occur; Chlorophyll A, Chlorophyll B & Carotenoids.  To address these processes you would need a minimum of 3 Bands, and to bring the full potential of your plants photosynthetic ability, you will need 2 of these Bands to be duplicated in more than on spectral output.   This is why we use 5 Bands in our lights, any more would be redundant and done so with an off-peak frequency.  Some companies advertise as much as 10 or 11 Bands, and although this sounds good in theory, in reality it is using the same principles that make an HPS light only capable of emitting 15% of absorbable light to your plants and this defeats the whole efficiency concept behind the use of LEDs.

5)  Lastly, the choice of which company to purchase your LED Grow Light is ultimately up to you and we try to provide you with as much detailed information as we can to help you make a more informed decision.  To better ensure you are getting what you pay for, make sure the company has been in business for several years and they offer a guarantee of performance and stand behind the product they are selling to the public.  The best way to really determine if you're buying a quality light is to talk to the company and ask questions.

When it comes to purchasing LED grow lights, we at ALL LED LLC know you have a plethora of choices available from many different sellers, all of whom claim that their products are the best available. While LED grow lights are definitely more power-efficient than the old generation of High-Pressure Sodium and Metal Halide bulbs, and will considerably lower your electricity bill, all LED grow lamps are not standardized and do not represent equal performance.  There are literally unlimited variables of wavelengths and ratios that can be employed into a light design, as well as the LEDs themselves and how they are powered.

ALL LED LLC wants you to know these facts before you decide:

Some manufacturers claim that their lamps are the brightest, and offer their specifications in lumens. A lumen, however, is a measure of light which is based upon human perception and not a true, accurate measure of the photosynthetic power of light at all. Indeed, while their light may appear to be bright to us, it might not be bright to plants at all; if the light does not consist of all the precision values (wavelengths) plants need to thrive. If a manufacturer advertises their light specifications in lumens, lux or candlepower, beware!

Plants also use many different bands of light for photosynthesis, and some bands of light which, while not photosynthetic to a plant, aid in healthy development, as well as flowering. Some of these photosynthetic and non-photosynthetic wavelengths are nearly outside the human range of perception, and do not seem as bright, even though they are nearly equal in power to the highly-visible bands. If these bands are neglected in favor of LEDs that appear bright to our eyes, plants will not develop correctly. This was a common complaint with early LED grow lamps that used only one or two different values of LEDs, but many manufacturers still design and produce lamps to these outdated specifications.

Oppositely, some manufacturers advertise a full-spectrum, and often include white, green, and yellow LEDs in their design. Many of these wavelengths, however, are inefficiently used by plants, if utilized at all. Plants have three main photosynthetic substances that react best at certain, precise wavelengths of light. When you look at plants in sunlight, most plants appear green, because the bluish-green through yellow-orange spectrum is the spectrum of light which most plants reflect. Reflected light is light which is not used by the plant! To address the use of white LEDs, almost all of them combine certain amounts of blue, red, and green light to produce what we see as white (visual purpose was the reason they were manufactured in the first place), but almost all of these white LEDs use wavelengths of these individual colors that are still nearly useless to plants.  Full spectrum advertisements SOUND good, but they are wasteful of the light you NEED and the electricity you pay for!

LED precision is of the UTMOST importance! If an LED output is even a fraction off of the plants necessary peak value, it can be extremely inefficient for photosynthetic and non-photosynthetic processes. Some manufacturers use less-expensive LEDs that seem close enough to the numerical peak, when, in fact, their chosen values may need up to 10 times (or more) as many LEDs to do what ONE LED of peak-value efficiency will do!  ALL LED LLC has scoured the globe to find the EXACT peak values that plants utilize. Only right on is close enough for us!  (And it should be for you as well!)

As you shop, you will also notice that some manufacturers advertise that they are using 5 and 10 watt LEDs in their products. While these LEDs are certainly showy and brighter than their 1 and 3 watt counterparts, they are also very power-inefficient. Higher-wattage LEDs create more heat, so much of the electricity they consume goes toward the manufacture of that heat, and the sad truth is that they do not put out nearly the proportion of light to the power consumed as the 1 and 3 watt LEDs. Depending on LED manufacturing differences, some 5W LEDs put out LESS light than the best 3W LEDs!  (Also, it should be noted that, for the wavelengths of light plants can best use, very few of these wavelengths are available in LEDs rated higher than 1 and 3 watts!)  Ironically, products that use higher-wattage LEDs to produce the same amount of light as 1W and 3W-based units are also much more costly to manufacture, and that cost gets passed down to you as the consumer many times over: once at the time of purchase, and again, every time you pay your electricity bill!

Lastly, many knockoff imitators manufacture lamps that may look like ours, or might actually differ in case color, shape, or style. These sellers claim to be just as good or better, but they rely on cheap gimmicks in order to try to stand out from the rest. (One maker even offers a black case, and black ABSORBS light!)  If you do your research, it will become very clear as to who is for real and those who are just reselling some cheap imported light to take advantage of a very promising industry.

2011 China Semiconductor led Lighting Technology and Application Forum held in Shanghai

2011 China Semiconductor Lighting Technology and Application Forum (fourth) and the China-star hotels LED lighting

design and the classic case reports will be March 30 at the Shanghai New International Expo Center Hall at W5.   

    According to this forum by the China Semiconductor LED Lighting Association Professional Committee, by the Professional Committee and the extension SOTA Pu Semiconductor Industry Research Institute in collaboration with the Chinese Association for semiconductor lighting according to Tang Guoqing, director of the committee to do his opening statement, Chairman of China Association of Lighting a leader Chen Yansheng speech .   

    　Speech Jia Binya Research Information Consulting (Shanghai) Co., Ltd. General Manager David Lee spoke on "Aspects of China's semiconductor lighting industry," he said booming global semiconductor lighting, semiconductor lighting industry in China grew rapidly, increasing the global share. LED of the three main cell phone, large-size backlight and lighting applications, LED China 2011 to 2012 industrial packaging applications continue to maintain double-digit growth, China LED lighting applications will reach more than 50% annual growth rate is expected in 2011 800 billion yuan. China's semiconductor lighting investment hot substrate, the substrate materials, is investing a large capital investment in 2010 reached 6.5 billion yuan, planning production capacity of 20 million or more. Capital market in China's semiconductor led lighting hot, closing the end of 2010, China's semiconductor lighting nearly 60 listed companies related to semiconductor led lighting based business market exceeded one hundred billion yuan.   

Professor Chen Jinxin as "OLED lighting: China's Opportunities and Challenges" lecture topic

    Subsequently, the Haiming Kai Lighting Sales Co., Ltd. Sales Director Mr. Wang Qiulang introduced the "LED lights hotel lamps replace the outreach program, "the legend of its information on the comparative wealth of detailed and has a high practical. After the Shanghai Modern Design Group Consultants General Engineering Division Li Guobin, Philips technology program manager Wu Peng, China, Shanghai era lighting electrical testing in Chen Chao, Managing Director, Optical Manufacturing Co., Ltd. Dalian nine years Zhanjia Zhang Deputy General Manager of Sales and other speakers have brought great value, very rich speech content. Shanghai Jiaotong University Electronic Information and Electrical Engineering School of chair professor Chen Jinxin speech topic is "OLED lighting: the opportunities and challenges in China," he pointed out that by 2020, to apply the term, general lighting, display lighting and backlit about OLED lighting each 35%, 25% and 25%, he also stressed the start of this year is the first year of OLED, OLED will be a difference in the future.

LED Lights Delta 2011 continues to strengthen SLBU

Delta Group is the world's largest provider of switching power supplies and DC brushless fans, as well as a major source for power management solutions, components, visual displays, industrial automation, networking products, and renewable energy solutions.

http://www.ledlightsliving.com/

Delta Group has sales offices worldwide and manufacturing plants in Taiwan, China, Thailand, Mexico, India and Europe. As a global leader in power electronics, Delta's mission is, "To provide innovative, clean and efficient energy solutions for a better tomorrow." Delta is committed to environmental protection and has implemented green, lead-free production and waste management programs for many years.

http://www.ledlightsliving.com/led-indoor-lights-c-55.html

With strengths in multiple core technologies and global distribution, Solid-state led Lighting Business Unit (SLBU) provides not only high-performance products of high quality and marketable price, but also continuously offers new developments to partners to achieve together energy-saving Led lighting businesses.  Product application includes roadway lighting, indoor consumer and commercial lighting, and architectural lighting.  2010 SLBU achieved shipments of 1.2 million led lamps, 20,000 outdoor lighting fixtures, and 22 projects for architectural design and fixture offering, demonstrating its in-depth design and manufacturing capabilities.

LED Lighting for Exhibit Spaces and Gift Shop

A Smithsonian Affiliate and One of the Country’s Premier Aerospace Museums Has Chosen MSi Led lighting. This Lights Efficient, High Quality Output is so Good it Surprises the Museum’s Chief Building Engineer.

Recently the San Diego Air and Space Museum picked MSi led lights as replacements for the hot and inefficient tungsten halogen Lighting that were being used in their exhibit spaces. This Smithsonian affiliate museum is home to many historically important and rare aircraft including a British Spitfire, a Navy F6F Hellcat and the A4 Skyhawk jet fighter.

As MSi sales representative Daniel Stern explains MSI Led lighting is so good it even fooled the trained eye of the museums chief building engineer. “He had viewed my demonstration of our newest lights and immediately agreed to their purchase. As we were walking out he pointed to the gift shop and said that he wanted to replace those halogen lights next. Little did he know the independent management company that operated the gift shop had replaced the halogen lighting with MSi iPAR38’s last November. For over five months he had not noticed any difference in light output between the old halogen lights and the new MSi LED’s. Great testimony to the advancements MSi has made in LED lighting.”

LED lighting offers many advantages over tungsten halogen lighting traditionally found in museums - chief among them are cost savings in energy and maintenance. LED lights consume far less energy and produce almost no heat meaning reduced cost for both electricity and cooling. Museums will also realize savings in the costs of light replacement. A typical tungsten halogen light burning 12 hours a day will need replacement every four months. The equivalent LED light burning 12 hours a day can last up to 13 years.  Tough LED lighting can also withstand the constant repositioning that is required by museum’s changing exhibitions.

Further advantages of LED lighting include its ability to be dimmed without any shift in its color spectrum. This allows museums to increase or lower lighting for changing exhibitions without altering the color temperature of the light being produced. LED’s also provide a more focused light without any of the irregularities that occur when the tungsten halogen light passes through the lamp’s lens.

But perhaps the biggest advantage to using MSi LED lighting in museums is its contribution to the preservation of the objects that is housed there. Materials such as paints and fabrics can suffer damage and fading as a result of the ultraviolet and infrared light waves that are produced by tungsten halogen lighting. The light emitted by LED’s contains neither of these harmful wavelengths that can result in damage to priceless works of art.

“The color rendering index of newest LED’s will now meet or exceed that of the traditional tungsten halogen lighting,” said Bruce Johnson, MSi managing partner. “That means that museums can now realize all the cost savings and preservation benefits of LED lighting while allowing visitors to view objects and colors the way they were intended to be seen.”

Audi R8 LED Headlights - Tech Dept

Are incandescent headlights on their last flicker? They lit the road ahead for almost a century, but interest in incandescence, or light made with heat by pushing current through a thin filament, is going cold.

 

Light-emitting diodes, or Leds, promise greater light for less power and waste heat. A

lready used in taillights and turn signals, the LEDs’ steadily improving efficiency means this technology is moving up to the big job. They’ll be the standard-equipment headlights on the 2010 Audi R8 V-10 and optional on the V-8 R8. U.S. prices aren’t finalized, but ­Europeans will pay about $5000 for the set.

Why is Audi pursuing this technology? Simple: LEDs make more light than heat and take up less space. There is another benefit, too: LEDs can be arranged into whatever shapes designers and engineers demand—especially important to a style-leading brand such as Audi.

The common incandescent halogen bulb shines by electrifying and superheating a tungsten filament sealed in halogen gas. Less than five percent of the power consumed results in light, the rest is heat that is wasted. The ratio is somewhat better with high-intensity-discharge, or HID, headlights, where instead of passing over a solid filament, the current arcs between two filaments through a cloud of light-amplifying xenon gas.

Instead of incandescent, an LED is electroluminescent. Light is produced by electrifying a material, in this case a silicon chip, which is treated to be a diode, or a conductor through which electrons flow only one way. Varying the voltage to both sides of the diode excites the electrons, and their movement creates photons, or light.

Thanks to chip improvements, LED output is whiter and also brighter, from 15 lumens per watt in 2001, when Audi started its research, to 60 today, says Audi’s light engineering director, Stephan Berlitz. In the R8, the LEDs are clustered—14 for the low beam, eight for the high beam—and cooled by fans to keep internal temps below a diode-killing 300 degrees F. The fans also circulate warm air to defrost the lenses on cold mornings.

Berlitz says costs will remain high until more automakers adopt LED technology. Until then, LED hype will generate more heat than light.

New LED Lights Have a Bright Future for Communication

The University of California, Riverside will lead a multi-campus effort that could reshape the way we communicate and navigate in homes, offices, airports and yes – even the way billboards might contact us on city streets.

http://www.ledlightsliving.com/led-neon-flex-lights-c-87_104.html

The Center for Ubiquitous Communication by Light (UC-Light) will be funded with $3.5 million from the Multicampus Research Program and Initiatives (MRPI) competition within the University of California system.

“PDAs, HDTV, information kiosks, computers and laptops all can be interconnected wirelessly through visible light,” said Zhengyuan Xu, a professor of electrical engineering at the Bourns College of Engineering, the principal investigator and director of the new research center.

He will work with researchers with expertise in communication, navigation, transportation, networking, and circuit integration from UC Riverside, UC Berkeley, UC Davis, UC Merced and the Lawrence Berkeley National Laboratory to take advantage of the communication properties presented by led lights.

The project is anticipated to begin in January 2010 and run for five years.

Xu said the potential impacts of the research are huge. “With a proper data interface to a wired data network such as Ethernet, they make it possible to build very low-cost communication and navigation systems on existing Lighting infrastructure.”

The research results will likely have implications for current broadband wireless communication, HDTV signals, traffic navigation and directions, retrieving information via cell phones from electronic billboards, or allowing the refrigerator light to transmit information about what is needed on the next trip to the grocery store. Results will be especially important in areas where radio frequencies are limited, such as hospitals and airplanes.

“The visible light spectrum is several orders of magnitude larger than the crowded radiofrequency (RF) spectrum, and thus has huge potential for low cost and high data rate communication,” Xu said.

Discoveries will lead to an increase in related intellectual property, which would foster further technology transfer from the university to the commercial world, and could replace or supplement current wireless communication networks.

The Center will establish an advisory board consisting of invited experts and representatives from industry, government and academia. The researchers will consult advisory board members informally throughout the year, and the board will have a formal face-to-face meeting once per year.

Just like centralized heating systems contributed to the proliferations of rooms in a house, the advent of indoor plumbing contributed to the emergence of modern bathrooms and kitchens, and most dramatically the advent of the electric safety elevator allowed architects to design tall buildings; the advent of communication through common light sources could lead to a difference in the way houses and offices are designed.

Design a low-cost, high-performance LED driver

As Led production costs fall, they're being used more frequently in applications ranging from handheld devices, to automotive, to architectural Lighting. Their high reliability (operational lifetimes of greater than 50,000 hours), good efficiency (175 Lumens/W), and nearly instantaneous response make them a very attractive light source. However, driving LEDs is not without its challenges.

A controlled brightness requires driving the LED with a constant current, which must be maintained regardless of input voltage. Quite often, LEDs have a dimming requirement. For instance, it may be desirable to dim a display or architectural lights. There are two ways to accomplish this: either vary the LED current, or use pulse width modulation (PWM). The least effective way is varying the current because the light output isn't completely linear with current and the LED color spectrum tends to shift at currents below full rating.

It's important to remember that human perception of brightness is exponential, requiring a large percentage change in current for full dimming. This has a profound impact on the circuit design as a 3% regulation error at full current can become a 30% or more error at 10% load due to circuit tolerances. Dimming current waveform through PWM is more accurate, although the response speed becomes an issue. In lighting and displays, it's desirable to PWM above 100 Hz so the human eye doesn't perceive flicker.

Figure 1 shows a very simple, low-cost, buck regulator driving a single LED that implements a very fast dimming feature. This is based on a MC33063 which has an internal switch, a current-limit comparator, an oscillator, and an internal reference. A disable function is provided by the pin that's usually used for voltage regulation. In this scenario, a voltage greater than 1.25 V disables the supply while a lower voltage enables it. With the circuit enabled, the controller operates in a current limit/hysteretic mode, because voltage feedback has been eliminated.

http://www.ledlightsliving.com/

1. This MC33063 forms the heart of a low-cost led driver.

The oscillator generates a start pulse that causes the power switch to be turned on. This puts the input voltage across the current sense resistor, LED, and inductor. The current-limit comparator senses when the current reaches about 350 mA and turns off the power switch. The inductor voltage reverses and flies above the input voltage, causing the freewheeling diode to conduct. The inductor and LED current continue to circulate until the switch turns on at the next switching cycle. This circuit is very adaptable for a wide range of applications. Using a switching regulator with a voltage rating of 40 V and a current rating of 1.5 A is useful in handheld portable devices, white goods, and automotive applications where simplicity and low cost are desirable. The basic topology could be adapted for a wider range of applications although it may be a challenge to implement the hysteretic control and enable functions so simply.

 

 

2. As shown, the hysteretic current control provides rapid PWM response. In the images, the green represents the output current, while the blue represents the PWM signal. The top image shows 500 us/div, while the bottom image shows 10 us/div.

The circuit of Figure 1 has been built and tested. Figure 2 shows the disable command and the resulting LED current waveform. The LED can easily be PWM dimmed at 500 Hz. Rise time and fall time of the current waveform is less than 100 μs. If higher ripple current could be tolerated in the LED, the inductor could be made a smaller value and the rise time and fall times could be improved. However, 500-Hz PWM is suitable for most applications.

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Sharp new LED ceiling lights will hit Japanese market

Sharp’s new models of Led ceiling lights enable to come in an extremely thin design - measuring a mere 43mm at the thickest point, going all the way down to 8mm at the thinnest.

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Out of the six models, three of them - the DL-C501V/C301V/C302V, will enable one to rely on a remote control to change the color of the white light courtesy of the Adjustable Color function, not to mention being able to adjust its brightness level as well.

In a nutshell, you get 110 different levels of color and brightness in order to suit a particular mood or time of day. Having a heart for the environment as well, LED lights will help lower energy consumption by up to 65%.

LED component assembly benefits from SMT processes

Recent growth in LED technology and solid-state Lighting has provided the electronics manufacturing industry with viable solutions for its addition into today’s electronic devices. LEDs have become an alternative light source to conventional incandescent and fluorescent bulbs. The electronics manufacturing industry sees the greatest benefits from the small size and lower power consumption of today’s LEDs.

There also is the recent trend to use “green technology” in consumer and commercial electronics. LED components offer high brightness and power efficiency, as well as lower carbon emissions than traditional lighting technologies. This aspect has made Led lighting popular with government organizations, which are now installing led lighting in public places and government offices worldwide.

When used for illumination purposes, LEDs are more cost-effective than traditional lighting sources. Thus, the global LED component market is witnessing an increasing demand. As a result, companies in the surface-mount technology (SMT) industry are expanding their manufacturing capabilities to meet this demand. High brightness LED components currently are experiencing high growth as the backlighting application in TVs is shifting from traditional CCFL technology to LEDs. The range of new and potential applications for LEDs in electronics is practically endless.

 

 

In order for electronics manufacturers to get these LEDs into their products, they must use one of two methods: hand assembly or automated assembly. Hand assembly is where skilled technicians carefully place individual LED components onto circuit boards using specialized tooling. This is a long, tedious process that can slow the production rates of electronic devices and tie up major labor resources.

On the other hand, automated assembly uses the company’s existing SMT equipment to quickly and efficiently place thousands of LED components every hour. Most SMT equipment is capable of placing multiple components on a circuit board at one time, increasing the overall production rates while decreasing labor costs. Obviously, the goal of a high-volume electronics manufacturing company would be to transition assembly into automated production.

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Pick and place

The principle of using vacuum pressure and precision nozzles to enable component placement is repeated in every type of SMT equipment. There are five distinct stages of the pick-and-place process:

Picking: components are withdrawn from a feeder or tray by a vacuum nozzle

Holding: components are steadied for rapid movement while the machine detects proper alignment

Transport: components are transferred from the picking location to the PCB for assembly

Placement: components are lowered to their specific location on the circuit board

Release: components are released by the nozzle, which returns to the picking area to restart the process

No SMT equipment can place components accurately or run efficiently without quality nozzles and feeders, which are at the core of the pick-and-place process. If the machine is either unable to pick parts consistently or hold on to the components during the transport from feeder to PCB, defects will result. An increase in defects means a decrease in production, costing the company more money over a short period of time. Proper feeder and nozzle selection is critical, especially with the current market growth and technological advancements in SMT equipment.

Nozzles are the first and last thing to touch all components placed, and they move tens of thousands of these parts every hour. With components sizes reaching microscopic proportions, nozzle manufacturers must strive to maintain precision tolerances and exact dimensions in their designs. These nozzles are required to hold the part during transport to the board while the machine is moving and/or rotating at high speeds. providers must use this technology to get LED components into their customer’s products.

 

 

EMS providers

Debron Industrial Electronics, Inc. is a leading electronics manufacturing service (EMS) provider specializing in high-technology electronic assemblies, printed circuit board assemblies, electronic wiring, cable assemblies and box build. Mark Hoch, SMTA Certified Process Engineer for Debron, said “We are a contract manufacturer that caters to several customers specializing in cutting-edge LED technologies. They rely on our expertise to develop, document, implement and sustain their manufacturing processes.” When one of its customers needed a product that required the placement of LED components in its design, Debron decided to move forward with the automated assembly process.

Since making the transition, Debron has helped several of its customers to fully automate the production of products that previously had been assembled by hand. The company was able to do this by creating custom pick-and-place trays for LEDs that were available only in bulk for hand assembly. Debron also has been working with tooling companies such as Count On Tools, Inc. to develop custom pick-and-place nozzles that enable LEDs to be picked, vision centered and placed with high-speed, automated SMT assembly equipment. Streamlining the automated placement process has allowed Debron to free needed manpower to use in other areas of the assembly process.

As with any new project, there are some challenges associated with the placement of LED components in the SMT production environment. It is the goal of the EMS provider to overcome each of these obstacles to cut production costs and provide quality product to its customers and their end users. Some of the major challenges that EMS companies face when trying to place LED components in SMT production include:

1. Component handling in the feeder

During the picking process, LED components are withdrawn from the feeder by a vacuum nozzle. SMT technicians must ensure that the LED components are correctly positioned in the feeder pocket to guarantee that pick-up is achieved and that the LED is properly handled during the transport stages. “Slop in the pocket” may require nozzle centering during the picking process while excessively fast advancements of the feeder may skew the part in the pocket, preventing component pick-up.

2. Component handling on the nozzle and proper nozzle selection

Some LEDs, such as those from Cree, require special handling operations to prevent damage to the optical lens. They must avoid placing mechanical stress on the LED lens by not touching the optical surface during the component picking or placement processes. This eliminates the possibility of degraded performance from the LED after the circuit board is assembled. Proper nozzle selection also is important for the transport and placement processes. Not only does the SMT nozzle have to pick the component, it also must move it to the board and accurately place it. Most LED suppliers work directly with nozzle and tooling manufacturers, like Count On Tools, to develop nozzle designs that meet their individual process requirements.

3. LED sensitivity

The fragile optical surface is not the only issue with the use of LEDs in SMT production. Early LED designs were very temperature-sensitive, forcing assembly using unconventional methods, such as hand assembly. LEDs often were bonded to heat dissipative substrates using conductive epoxies or low-temperature solders. This required special assembly processes that lengthened the manufacturing process, increasing product build costs.

 

 

4. Scaling up to high-volume production

As LEDs become more robust, assembly via means of more conventional assembly processes such as automated SMT equipment allows EMS companies like Debron to focus on other challenges such as repeatable part picking and vision centering, as well as effectively increasing throughput and minimizing defects. Repeatable performance is the major challenge with scaling up to high-volume production. EMS providers must strive to maintain a high level of performance to keep their production on track to meet customer demands. This requires fine tuning the assembly process.

As with any problems in a production environment, there is always a solution. By capitalizing on its current knowledge of SMT production and partnerships with quality suppliers, Debron was able to overcome most of the challenges associated with this process. Debron developed custom trays for the LED components to allow for more accurate picking and transport processes while eliminating issues with component handling in the feeder. It also worked with its equipment manufacturers and custom-tooling manufacturers such as Count On Tools, Inc. to develop custom SMT pick-and-place nozzles that increase LED/nozzle compatibility, allowing for greater placement accuracy and increased throughput.

Due to the partnership with Count On Tools, Inc., Debron was able to fine tune its automated assembly process and scale up to high-volume production of LEDs. Using the custom nozzle that it purchased from Count On Tools, Inc., Debron was able to reduce LED fallout to 2.3 percent. Defect rates dropped significantly and first pass yields increased steadily up to 99.4 percent.

Summary

In conclusion, the latest LED technology opens up wide areas for new applications, new technical possibilities and reduced costs in both the SMT and electronics manufacturing industries. Today, many companies are crossing traditional business boundaries and streaming into the LED lighting market. This, in turn, has created a large demand for LED use in general markets and not the traditional niche applications. By partnering with component manufacturers and nozzle/tooling suppliers, EMS companies like Debron can guarantee success by lighting the way for customers seeking LEDs in their SMT production.