How can LED road lighting be saved and better?

The LED road lighting market is becoming more and more popular. Recently, Zhuhai city announced a major energy-saving plan to transform more than 90 thousand street lamps in Zhuhai into LED street lamps by the end of 2013, at the same time, it plans to build more than 7800 new LED street lamps. LED lighting with high technology content, low resource consumption, less environmental pollution and other excellent quality, its application field is extending from home lighting to road lighting. Replacing traditional street lamps with LED street lamps is not only done in Zhuhai city, 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. The United Nations Conference on Sustainable Development held in the middle of this year (Rio 20 summit)On, the climate organization (TheClimateGroup) The results of an independent technical test released show that LED road lighting can save up to 85 energy. However, some data show that urban life consumes of energy, of which comes from road lighting. In addition to the energy-saving characteristics of LED lighting itself, intelligent control of road lighting will further release the energy-saving potential of LED road lighting. Reporters learned that Philips lighting is at the forefront of innovative research in this area. Its StarsenseCityTouch city lighting control platform can connect all light sources to the central platform through Wireless Intelligence, therefore, these light sources can be remotely controlled, and then a single light source can be adjusted according to actual conditions such as people flow, traffic and weather changes. These intelligent lighting systems can help us detect whether there are pedestrians and vehicles on the road. If not, the lights can be dimmed or turned off. Dr. He Dana, vice president of Philips 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, domestic LED road lighting (Including LED street lights and tunnel lights) The total output value is 3. 5 billion yuan, and the total output is 910 thousand. Among them, the output value of street lamps is 2. 9 billion yuan, the output is 680 thousand, and the installation volume is 530 thousand. The output value of LED tunnel lamps is 0. 5 billion yuan, the output is 230 thousand lamps, and the installation quantity is 190 thousand lamps. Market participants predict that the output value of LED street lamps is expected to account for of the whole street lamp market in 2012, and the advancement of urbanization will further stimulate the demand for LED road lighting. While saving energy, it should be more humanized. Although the energy-saving effect of LED road lighting has been recognized by the market, it is also facing some criticism, among them, the lighting source is too bright, the glare is serious, and the light is too strong and dazzling. At the end of 2011, the General Administration of Quality Supervision, Inspection and Quarantine announced that the qualified rate of road and street lighting products was only 58. 3. The overall quality of LED road lighting lamps is worrying. Taking glare as an example, it can cause eye fatigue and discomfort. According to Philips lighting researchers, glare refers to the extreme brightness contrast in space or time due to inappropriate brightness distribution in the field of view, visual conditions that cause visual discomfort and reduce visibility of objects. For example, when a bright spot appears in the dark field of vision and people's eyes are difficult to adapt and focus, glare will occur, which will lead to eye fatigue and discomfort. With the gradual promotion of LED road lighting, many LED street lamp enterprises have begun to pay more and more attention to more humanized lighting demand factors such as standard application, light distribution quality and visual comfort. However, how to overcome the above-mentioned deficiencies 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 perceived by people. For the same actual light output, people's perception is that low color temperature light (Warm white light)The discomfort caused is lower than the light with high color temperature (Cold white light). One possible reason is that people have their own preferences for color and light, and people prefer warm white light (Such as Dawn, night and dusk)In high light, cold white light (Other daytime time) The further reason may be that human beings have always linked warm colors to dusk/Dawn and cold colors to daytime. Philips Research also found that another factor causing glare is the illuminance reaching the eyes. Most lamps not only shine on the road, but also some light is sprinkled on the edge of the road. A seemingly reasonable approach is to limit the spread of the light beam so that the light emitted by the lamp only illuminates the road surface. It is generally believed that doing so can reduce glare and energy consumption. However, research shows that this kind of extra light sprinkled on the roadside and eyes is very useful: it not only illuminates some of the surrounding environment, but also improves the adaptive brightness of human eyes, it helps the driver to adapt to the front conditions more quickly, resulting in increased driving comfort.