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The LED road lighting market has gradually become a climate. Zhuhai City has announced a major energy-saving plan. It will transform all of the more than 90,000 street lamps in Zhuhai into LED street lights by the end of 2013, and plans to build more than 7,800 LED street lights.
LED lighting with high quality, low resource consumption and low environmental pollution, its application field is extending from home lighting to road lighting. The replacement of traditional street lamps with LED street lights is not only in Zhuhai, but also in many places including Suzhou, Changde and Chongqing.
The power behind it comes from the huge energy saving potential of LED road lighting. At the United Nations Conference on Sustainable Development (Rio 20 Summit) held in the middle of this year, the results of an independent global technology trial released by The Climate Group show that LED road lighting can save up to 85 energy. And there is data showing that urban life consumes 70% of the world's energy, and 15 of them consume energy from road lighting.
In addition to the energy-saving features of LED lighting itself, intelligent control of road lighting will further release the energy-saving potential of LED road lighting. The reporter learned that Philips Lighting's innovative research in this area is at the forefront. Its StarsenseCityTouch urban lighting control platform can connect all the light sources to the central platform through wireless intelligent, so that these light sources can be remotely controlled and then flowed according to the flow of people. Individual sources are regulated by actual conditions such as traffic and weather changes. These intelligent lighting systems help us detect pedestrians and vehicles on the road, and if not, dim or turn off the lights. Dr. He Dana, Senior Vice President of the Philips Group Research Institute and Chief Technology Officer of Asia, said.
The market potential of LED road lighting is gradually being released. According to statistics, in 2011, the total output value of domestic LED road lighting (including LED street lights and tunnel lights) was 3.5 billion yuan, with a total output of 910,000 baht. Among them, the output value of street lamps is 2.9 billion yuan, the output is 680,000 baht, and the installed capacity is 530,000 baht. The LED tunnel light has an output value of 500 million yuan, a production capacity of 230,000 baht and an installed capacity of 190,000 baht. Market participants predict that the output value of LED street lamps in 2012 is expected to account for 50% of the entire street lamp market. The advancement of urbanization will further stimulate the demand for LED road lighting.
Energy saving should be more humanized. Although the energy-saving effect of LED road lighting has been recognized by the market, it also faces some criticisms, including lighting sources that are too bright, glare is severe, and lights are too strong and dazzling. At the end of 2011, the General Administration of Quality Supervision, Inspection and Quarantine announced that the quality of road and street lighting products is only 58.3, and the overall quality of LED road lighting is worrying.
In the case of glare, it can cause eye fatigue and discomfort. According to researchers at Philips Lighting, glare refers to visual conditions that cause visual discomfort and reduce object visibility due to unsuitable brightness distribution in the field of view, or extreme brightness contrasts in space or time. For example, when a bright spot appears in the dark field, when the human eye is difficult to adapt and focus, glare occurs, which causes eye fatigue and discomfort.
With the gradual promotion of LED road lighting, many LED street lighting companies have begun to pay more and more attention to more humanized lighting demand factors such as standard applications, light distribution quality and visual comfort. How to overcome the above-mentioned shortcomings of LED lighting is particularly urgent.
Philips Lighting's research on how to overcome glare shows that the color temperature of light has a significant impact on the degree of glare that people perceive. For the same actual light output, people perceive that low color temperature light (warm white light) causes less discomfort than high color temperature light (cold white light). One possible reason is that people have their own preferences for color temperature and illumination. People prefer warm white light (such as dawn, night and dusk) in low light, and prefer cool white light (ie other daytime) in high light, further The reason may be that humans have always associated warm colors with dusk/dawn, and connected cool colors with white enamel.
Philips' research also found that another factor that causes glare is the illuminance that reaches the eye. Most luminaires have both light on the road and some light on the edge of the road. A plausible approach is to limit the spread of the beam so that the light from the luminaire only illuminates the road. It is widely believed that this can reduce glare and reduce energy consumption. However, studies have shown that this extra sprinkling of light to the roadside and eyes is very useful: it illuminates some of the surrounding environment and improves the fit of the human eye, helping the driver to adapt to the conditions ahead. The result is increased driving comfort.