1 Introduction
For a long time, traditional light sources-high-pressure sodium lamps and some metal halide lamps have been playing a leading role in road lighting. In recent years, domestic LED lighting applications have developed rapidly, and many manufacturers have successively introduced high-power LED street lamps, which are increasingly used in road lighting as energy-saving products. This article makes a bold discussion on several issues in the development and application of road lighting LED street lamps.
As a semiconductor light-emitting material, compared with other light-emitting materials, LED has attracted attention from home and abroad due to its advantages of green, high efficiency, reliability and durability. With the continuous development and progress of semiconductor technology, the application of LED can be said to be everywhere. In particular, the acquisition of white light, the improvement of efficiency, life, stability and other properties and the continuous reduction of costs have expanded the application field of LED light sources. In recent years, LED has achieved certain success in the field of landscape lighting, and the development of LED street lamps has opened up a wider world. Compared with traditional light sources, LEDs have outstanding advantages in color rendering, energy saving and environmental protection, life and digital controllability. We believe that after gradually solving a series of key technical problems such as heat dissipation and light decay, and achieving a significant reduction in cost, LED light sources also have good development prospects in the field of road lighting. At present, hundreds of companies at home and abroad have invested in the development of LED street lamps, some of which have been put into mass production. Recently, the Ministry of Science and Technology of China organized and implemented the "Ten Cities and Ten Thousand Lamps" plan, which received positive responses from all over the country and created a huge LED street lamp market. Some domestic and foreign application pilot demonstrations are also in full swing.
2. Provide a display platform for high-power LED street lights
In recent years, domestic LED lighting applications have developed rapidly, and many manufacturers have successively introduced high-power LED street lamps, which are increasingly used in road lighting as energy-saving products. In order to implement the State Council ’s decision on energy conservation and emission reduction and the Ministry of Construction ’s green lighting plan to ensure the standardization, serialization, and generalization of Tianjin ’s road lighting, the city ’s LED road lighting product quality and status quo will be used for about a year The performance testing and evaluation of LED road lighting products manufactured by the manufacturing enterprises will provide qualified facilities manufacturing suppliers for future road lighting construction in Tianjin to ensure high-level construction and efficient operation of road lighting facilities in Tianjin. In order to reflect the seriousness and transparency of testing and evaluation, it is organized by the Tianjin Lighting Association and implemented in conjunction with the Tianjin Product Quality Supervision and Inspection Technology Research Institute and the Tianjin street lamp management department, and an expert committee is formed to participate throughout the process.
According to "Tianjin City Center Urban Lighting Planning" (2008-2020) and "Tianjin City Center Urban Lighting Planning-Road Lighting Topics", manufacturers of participating equipment should provide 10 sets of lamps of the same style for testing according to road conditions The power of the lighting source tested and evaluated is about 150W; according to the "Urban Road Lighting Design Standard", the color temperature is about 4500K. The installation height and spacing of the facility shall be implemented according to the conditions of the test site, and shall be fair, reasonable and in the same condition. In view of the requirements of road lighting safety, the initial installation of the facility will be implemented by the street lamp management department.
During the one-year period of test evaluation, according to relevant standards, 12 data tests such as average road surface illuminance Eav and uniformity UE test, as well as lamp input power test, lamp power factor test, light effect test, and lamp light distribution curve Testing, testing of color characteristics such as color temperature, color coordinate, chromaticity tolerance, color rendering index, harmonic content of low-voltage lines, grounding measures and dielectric strength, and IP rating of lamps. It is also necessary to evaluate the light decay and visual effects.
The implementation of this semiconductor lighting application demonstration project is also a major measure to promote the "Ten Cities and Ten Thousand Lamps" plan of the Ministry of Science and Technology. For major landmark projects in urban planning and construction in the future, actively guide the promotion and application of semiconductor lighting products, create a market environment through demonstration projects, drive market demand, and introduce advanced technologies and products at home and abroad on the basis of integrating existing LED resources in Tianjin At the same time, coordinate and encourage domestic and foreign enterprises to actively participate in the construction of Tianjin Semiconductor Lighting Application Demonstration Project, build an international advanced level of semiconductor lighting application demonstration project, and jointly promote the integration and innovation of Tianjin LED application products technology. It has a positive role in promoting the establishment of an outdoor lighting application display exchange center and building a national platform for LED product and technology exchange.
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