"LED street lights can not be promoted at all. Now the quality of the products is uneven and the price is expensive. The 'Ten Cities and Ten Thousand' project is also a 'failed battles and repeated defeats.'" Southeast University Ph.D., Honorary Director of Jiangsu Lighting Society Professor Yang Zhengming was a little excited when he talked about this issue. He thinks that LED is a good light source and should be used well, but it has not been fully utilized for mass promotion. "It is up to the market to decide whether to replace existing high pressure sodium lamps.
High pressure sodium lamps and high pressure mercury lamps have coexisted for 10 years. If you really want to replace it, I think ceramic metal halide lamps are better than LED lamps. In the view of Professor Yang Zhengmin, LED is a good source of light for spotlights and downlights, and as a streetlight, it still needs to develop for five or six years. When the market is truly mature, the quality of LED street lamps needs to be improved.
"The advantages of LED street lights have not been exerted. LED lights are dimmable and can be operated dynamically, but traditional HID will not work." Professor Zhu Shaolong, Ph.D., Department of Lighting Engineering, Fudan University, and consultant of China Lighting Society believes that intelligent lighting is LED street light. The best way to use it. "The lights are bright when the car arrives, and the lights are dark after the car goes. Some cities in foreign countries have begun to adopt such technology. At present, domestic enterprises may have reached such technical requirements, but it requires sensor control and capital investment, so there is no instance. application."
At this stage, LED street lights are not new in technology compared with previous years. In addition, LED street lights are more controversial in terms of light efficiency, cost performance, evaluation and other key indicators.
"LED is a point source. If the application is not good, it is prone to glare. Moreover, from the perspective of the entire industry chain, the LED street lamp involves the radiator, the driver, and the cost of replacing the high-pressure sodium lamp is not necessarily more economical." Hangzhou Wu Mingfan of Mingda Optoelectronics LED Products Research Institute believes that LED street lamps have high technical requirements, and large-scale replacement is still needed.
In addition, the current evaluation of road lighting indicators uses "illuminance" rather than "brightness." Professor Zhu Shaolong pointed out that illuminance can replace brightness only when the light distribution reaches the bat-type light distribution. The actual situation is because the brightness measuring instrument is expensive and the popularization rate is not high. Therefore, for convenience, the brightness is generally replaced by illumination. There are loopholes in the evaluation system, and the quality of LED street lights is difficult to guarantee.
Enterprises also have their own views on the government's strong push for LED lighting renovation projects. "The government's promotion and subsidy can solve the urgent needs of enterprises, but whether it can fundamentally save the enterprise needs to be discussed separately. Whether the government-sponsored products are qualified or not can only be tested by time." Hangzhou Hongjian Liming Technology Co., Ltd. Zhang Feng, general manager of the company, is worried that the government will not cure the problem, and excessive administrative intervention may make the LED industry a "second photovoltaic." At the same time, he also pointed out that in the face of such an impetuous market, enterprises need to clarify their own development direction, rather than being supported by government support projects.
"Of course, the government's support will definitely help the LED industry and promote the development of the industry from a macro perspective. But the current situation is that the local government only pays attention to price and does not emphasize quality. It does not start from the perspective of whether it is affordable. The market is originally "turbid." "The government's lack of guidance and intervention will only get more and more mixed." Wang Hao is not worried.
(This article is reproduced on the Internet. The texts and opinions expressed in this article have not been confirmed by this site, nor do they represent the position of Gaogong LED. Readers need to verify the relevant content by themselves.)
High pressure sodium lamps and high pressure mercury lamps have coexisted for 10 years. If you really want to replace it, I think ceramic metal halide lamps are better than LED lamps. In the view of Professor Yang Zhengmin, LED is a good source of light for spotlights and downlights, and as a streetlight, it still needs to develop for five or six years. When the market is truly mature, the quality of LED street lamps needs to be improved.
"The advantages of LED street lights have not been exerted. LED lights are dimmable and can be operated dynamically, but traditional HID will not work." Professor Zhu Shaolong, Ph.D., Department of Lighting Engineering, Fudan University, and consultant of China Lighting Society believes that intelligent lighting is LED street light. The best way to use it. "The lights are bright when the car arrives, and the lights are dark after the car goes. Some cities in foreign countries have begun to adopt such technology. At present, domestic enterprises may have reached such technical requirements, but it requires sensor control and capital investment, so there is no instance. application."
At this stage, LED street lights are not new in technology compared with previous years. In addition, LED street lights are more controversial in terms of light efficiency, cost performance, evaluation and other key indicators.
"LED is a point source. If the application is not good, it is prone to glare. Moreover, from the perspective of the entire industry chain, the LED street lamp involves the radiator, the driver, and the cost of replacing the high-pressure sodium lamp is not necessarily more economical." Hangzhou Wu Mingfan of Mingda Optoelectronics LED Products Research Institute believes that LED street lamps have high technical requirements, and large-scale replacement is still needed.
In addition, the current evaluation of road lighting indicators uses "illuminance" rather than "brightness." Professor Zhu Shaolong pointed out that illuminance can replace brightness only when the light distribution reaches the bat-type light distribution. The actual situation is because the brightness measuring instrument is expensive and the popularization rate is not high. Therefore, for convenience, the brightness is generally replaced by illumination. There are loopholes in the evaluation system, and the quality of LED street lights is difficult to guarantee.
Enterprises also have their own views on the government's strong push for LED lighting renovation projects. "The government's promotion and subsidy can solve the urgent needs of enterprises, but whether it can fundamentally save the enterprise needs to be discussed separately. Whether the government-sponsored products are qualified or not can only be tested by time." Hangzhou Hongjian Liming Technology Co., Ltd. Zhang Feng, general manager of the company, is worried that the government will not cure the problem, and excessive administrative intervention may make the LED industry a "second photovoltaic." At the same time, he also pointed out that in the face of such an impetuous market, enterprises need to clarify their own development direction, rather than being supported by government support projects.
"Of course, the government's support will definitely help the LED industry and promote the development of the industry from a macro perspective. But the current situation is that the local government only pays attention to price and does not emphasize quality. It does not start from the perspective of whether it is affordable. The market is originally "turbid." "The government's lack of guidance and intervention will only get more and more mixed." Wang Hao is not worried.
(This article is reproduced on the Internet. The texts and opinions expressed in this article have not been confirmed by this site, nor do they represent the position of Gaogong LED. Readers need to verify the relevant content by themselves.)
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