At present, the LED lights in the domestic street lighting system are very loud: Shanghai should introduce 20,000 baht, and Changzhou should introduce 15,000 to 20,000 baht. Propaganda said that although the purchase cost of LED lights is higher than ordinary lights, it can save electricity and save money.
Philips Lighting held a harmonious city in Nanjing on January 8th. The seminar on light and shadow future invited designers and planners of Nanjing City Appearance Management Office, architects and other urban designers to discuss the city and people with Philips Lighting. How to create a more harmonious urban environment with the harmonious relationship between the three. Promote the application of energy-saving lighting in urban construction.
However, at the seminar on January 8th, Liu Lei, deputy chief engineer of the Nanjing Street Light Management Office, revealed that in August 2008, Nanjing began installing six different LED lights on the Taishan Road on the side of the Vanke City in Hexi. As a result, not only did the performance of the lamps vary greatly, but the lights of the same house also performed differently at different times. The lamp power of these six lamps ranges from 120W to 168W, and some lamps with a power of 168W are not as bright as 120W lamps. What is even more strange is that after a period of time, the brightness of the two companies rises, the brightness of the four houses decreases, and the length of life varies.
In addition, Liu Lei said: At present, there is no uniform standard for the production of LED street lamps. There is no way to maintain the street lamps. The products that the manufacturers provide for the test of street lamps are very fast, and some of them are eliminated in a few months. The test product of the normal high-pressure sodium lamp is at least 5-8 years, so the existing street lamp personnel can quickly judge and maintain the high-pressure sodium lamp street lamp.
Since the performance of LED lights is still unstable, how can Nanjing Street Light System achieve energy saving? In this regard, Liu Lei said that traditional street lights can use energy-saving methods such as voltage reduction and power reduction. All new street lights in Nanjing this year will use variable-power ballasts, which will automatically reduce power after 6 hours of lighting: from 400W to 250W, from 250W to 150W, from 150W to 100W. Longjing Middle Road has adopted street lamps that can automatically reduce voltage. This year's new projects will all adopt such power-reducing facilities, and more than 2,600 old lamps will be rebuilt.
The voltage is low, the power is small, will it affect the lighting effect? ​​If you don't see the moment of changing power, it is not very sensible. Liu Lei said that the lighting brightness and other controls have a lower limit to ensure the lighting effect.
At present, a number of advanced lighting energy-saving technologies, including warm white light and power reduction, have been piloted in Nanjing Huanling Road and Xuzhuang Software Park. Old districts and unlit streets will also be accompanied by new projects. Transformation. According to General Liu, the newly installed warm white light road lighting system on Nanjing Huanling Road should be a new road lighting system composed of ceramic metal halide lamp + HID electronic ballast, which can improve the environment of road lighting for people. Night travel brings more security and comfort, especially for places where commercial streets and squares have high requirements for color rendering index. Therefore, Mr. Liu has reservations about the LED street lights that are currently on the market!
Zhao Jianping, vice chairman of the China Lighting Society and the outdoor lighting professional committee of the China Lighting Society, also listed a large number of data about high-pressure sodium lamps and the best LED street lamps in the report. The results show that LED street lamps are not currently road lighting. The most ideal product. Moreover, the LEDs currently used for street lamps are LEDs with a color temperature of 8000K in order to improve the light effect, and the color temperature is obviously too high. The newly installed warm white light road lighting system on Nanjing Huanling Road, its color temperature is 2800K, this color temperature is ideal on the road. High illumination requires high color temperature, low illumination requires low color temperature; at present, in the country's new road lighting standards, the requirements for fast lane road lighting are as long as 20~30LX, and the color rendering index requirements are not so high; In the street, the color rendering index is very important, and the high-pressure sodium lamps are obviously low in this respect, so they recommend the use of COSMO products, which is the newly installed warm white light road lighting system on Nanjing Huanling Road.
In addition, a number of new urban lightings, such as the square carpet lights (the lamps are all arranged in the underground glass, the whole is like a carpet), warm white light (whiter than ordinary lights, but the color is bright and clear) are all presented at the seminar. .
Creating a harmonious city together with the future of light and shadow 2009-01-09
Philips Harmony City, Light and Shadow Future Seminar South... 2009-01-09
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