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LED lights will surely illuminate thousands of homes.
Dec 14,2012
Starting from October 1, 2012, our country will prohibit the import and sale of ordinary incandescent lamps over 100 watts, which is undoubtedly good news for the entry of LED into the civilian market. At the Guangzhou Lighting Exhibition in June, the pace of R&D for LED civilian products accelerated sharply, resulting in a richer range of product applications. Although most of the displays on site were still focused on commercial lighting, many companies also launched home LED product series.
These new products each have their own functional focus, with both cool and warm light options, and some can even adjust the color of the light. Unlike the relatively high-end products created in the past, this year manufacturers have begun to realize that products close to everyday life can be widely applied. For example, the LED bulb that can control the range of light can adjust the illumination range and angle according to one's needs; there are also LED panel lights that can adjust color temperature to meet the needs of different scenarios; and there are 64-pixel full-color mirror lights with stunning decorative effects.
The entry of LED lighting into the civilian market is an inevitable trend, and international lighting giants are optimistic about this future market. At this exhibition, Osram, the world's second-largest optoelectronic semiconductor manufacturer, showcased LED products characterized by high quality, flexibility, and easy installation. Among them, the newly launched PrevaLED light engine has a color rendering index as high as 90, and through active color temperature control technology, it maintains a high degree of consistency in light color among modules, solving the color deviation problem of LED lighting. Philips' booth design resembled a 'theater of light', with a transparent pyramid projecting 3D images like 'the small waist', and the most eye-catching were two LED bulbs suitable for mass consumption launched this year: the 'Freestyle' series includes candle bulbs and spotlights with unique designs and brilliant light, suitable for decorating an elegant and warm home atmosphere; the 'Wisdom' series offers 6W and 9W bulb specifications, with bright and soft light that is not glaring, particularly suitable for replacing incandescent and energy-saving lamps. GE's GEInfusion LED module, launched this year, features the smallest screw-in design, allowing for source replacement without changing the entire fixture, making it very convenient.
Currently, China's lighting industry is undergoing a revolutionary update, with incandescent lamps about to be eliminated, energy-saving lamps thriving, and LEDs on the rise. LED lamps represent a technological revolution in the lighting industry, with an LED lamp generally saving 70% to 80% more electricity than energy-saving lamps, and having a lifespan four times that of energy-saving lamps, but the price is 3 to 4 times higher, making the high cost a barrier to the popularization of home LEDs. At this exhibition, Shangshun Lighting made a new breakthrough in LED civilian lighting, offering a special price of only 100 yuan for three 7W bulbs. This means each bulb costs 33 yuan, which, while not cheap compared to traditional incandescent lamps, shows a significant reduction in price difference compared to mainstream energy-saving brands.
Key technological bottlenecks have seen new breakthroughs.
In recent years, although the development prospects of LEDs have been very rapid, the process of home popularization has been very slow. "This is not just about 'price' and 'mass production' issues; in addition to consumer recognition, there are also some technological bottlenecks that have not been overcome." According to Wang Jinsui, chairman of the China Illuminating Engineering Society, this has led to a significant gap between LED bulbs, LED downlights, LED fluorescent lamps, and traditional lighting in the market, which is far from as good as claimed.
Currently, the domestic market mainly features LED products in a three-in-one form, with three key elements: light source, driver power supply, and heat dissipation. The light source is the core part of the entire product, with chip technology mastered by Europe, America, and Japan, while most domestic companies adopt a purchasing and assembly approach. Therefore, although the threshold for LED lighting is not high, to do well, two key issues must be resolved—heat dissipation and driver power supply. In comparison, the challenges of the driver power supply mainly focus on the climatic environment of outdoor lighting, while heat dissipation is a major obstacle for home LEDs to move towards high-power lighting. Industry insiders reveal that in places like Zhongshan Guzhen, there are many LED assemblers who simply assemble LED light sources into traditional fixtures, with heat dissipation, light decay, and secondary optical design all falling short, and the lifespan not reaching ideal values.
Poor heat dissipation of LEDs can lead to light decay and significantly reduce lifespan. At this exhibition, reporters found that this technical challenge has seen new breakthroughs. Shenzhen's Youyicheng has completely overturned the ordinary LED heat dissipation method, launching the latest fin-type LED indoor lighting series for the first time, including ceiling lights, downlights, and floodlights. According to its general manager, Shi Yan, it can save more than 40% of aluminum material, weighing only one-third of traditional fixtures, and achieves better heat dissipation through more efficient thermal conduction, meeting the reliability and lifespan requirements of home LEDs. Addressing the heat dissipation challenge of several hundred watts of high-power LEDs, the Institute of Engineering Thermophysics of the Chinese Academy of Sciences showcased a latest research achievement from the 'National 863' program—microchannel composite phase change cooling technology, which became a highlight of this year's exhibition. On site, reporters saw this lightweight, compact, and low-cost high-efficiency heat sink, which can achieve a maximum heat dissipation power of up to 1KW. The developer of this technology, National Natural Science Foundation expert Hu Xuegong, told reporters that despite its simple and compact appearance, its cooling capacity is extremely strong, with a heat flow density of up to 400W/c㎡, which is 1000 times higher than water cooling and about 100 times higher than heat pipes. "It fundamentally solves the technical bottleneck of insufficient heat absorption capacity and total heat dissipation power of existing LED heat sinks."
However, whether LEDs can enter thousands of households depends on whether prices can come down. Currently, the chips used to produce LED lamps account for 60% of the total price. With the improvement of luminous efficiency and the expansion of production capacity, chip prices have already decreased by 30% to 40% this year, but there is still considerable room for improvement.
Future Lighting
Will overturn the concept of lamps.
On the eve of a large-scale entry into ordinary households, many people are curious: what will future LED lamps look like? The U.S. Department of Energy has stated that solid-state lighting is the most disruptive innovation technology in the lighting field in the past 50 years. Many industry insiders agree with this and believe that LEDs are disruptive products that are destined to revolutionize traditional lighting. At this exhibition, the stunning debut of some innovative LED products seems to indicate a trend: the future of lighting may rewrite the definition of lamps.
For example, GE launched the lightweight and stylish Lumination series LED pendant lights this year, featuring a forward-looking design that utilizes ultra-thin light guide plates and edge-mounted LED technology to maximize LED efficiency. Compared to fluorescent lamps, it has a longer lifespan, a thinner appearance, more creative shapes, stronger dimming capabilities, and design sense, and can be customized for lighting designers and end users. Incorporating personality and creativity into home lighting decor, Osram also launched its OLED lighting product—PirOLED, which uses five detachable ORBEOS flat reflective light sources, interspersed in a double-spiral lamp holder, not only creating excellent visual effects but also emitting beautiful diffuse light.
"Now we see that most LED tubes, LED bulbs, etc. are basically similar in appearance to our traditional fluorescent lamps and bulbs." Wang Jian, General Manager of GE Lighting's LED products in the Asia-Pacific region, stated that this is because when LED lighting applications first started, the main mission was to replace traditional lighting fixtures. The design was primarily focused on making it easy to replace traditional lamps and to be easily accepted by consumers. In the view of Wu Shengbo, President of Osram's Asia-Pacific region, simply making LED replacement lamps based on the appearance of traditional lighting fixtures does not reflect the best performance and characteristics of LEDs themselves. LEDs are solid-state adjustable light sources that need to be presented in their most ideal state.
The small size, low power consumption, and strong controllability of LEDs allow them to unleash designers' imagination more than traditional lighting. For example, the latest LED lighting series designed by Parisian designer Neil Poulton for the Artemide brand features a luminous halo equipped with strong magnets that can be attached to metal lamp brackets, offering great flexibility; while QisDesign has launched an LED desk lamp called "AURELIA," made of completely transparent material, resembling an underwater creature—the moon jellyfish, capable of creating various enchanting light and shadow effects. Philips has also introduced the "LED Colorful Vase," which, with just a gentle touch, fills the water with colorful lights, performing a splendid and dreamy magic show. With the accumulation of technology and continuous product upgrades, intelligent control and innovative designs will increase, and lighting will not just be about lamps anymore!
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