LED tunnel lighting market prospects

At present, light tunnel lighting mainly has the high pressure sodium lamp, fluorescent lamp, metal halide lamp etc.. Among them, high pressure sodium lamp has high efficiency, ultraviolet radiation, light, less can be in any position of shock resistance, long service life, especially in tunnel lighting is the use of mountain city outside of the tunnel, and the fluorescent lamp, metal halide lamp in recent years in the city tunnel lighting has also obtained a large number of applications. LED is the source of very fast development in recent years, the rapid increase of light efficiency and other performance indicators and the rapid decline in prices, so in the display, landscape lighting and successful application. At the same time, on the road lighting in directional lighting also began to gradually get used. The overall efficiency of LED overall optical efficiency advantages of the LED tunnel lights in addition to light effect related with the LED, but also related to 3 factors: two light optical design reached utilization rate, good heat dissipation to ensure the efficiency of the LED output luminous flux maintenance performance and driving circuit of LED. The efficiency of the above several parts is multiplied by the overall effect of the LED tunnel lights. By studying the luminescence mechanism of LED, we can calculate the LED radiation spectrum efficiency can reach 3501m/W, the luminescent mechanism of LED is cold light source, and the radiation spectrum in the visible range, so the actual efficiency is expected to be close to the theoretical value. Even taking into account the limitations of the process, the actual LED light effect if the theoretical value of half is also very impressive. The improvement of the efficiency of light means that the efficiency of energy utilization is improved. When the production technology of LED is developed, the advantages of LED will be highlighted in comparison with the traditional tunnel lighting source. Secondly, compared with the traditional light source, the LED is small in size, and can be used as a point light source in many applications. At the same time, because of the large size of the light source, the traditional light source has no effect on the LED light. Finally, LED only emit light to the half space, which means that the reflector without any form of the light emitted from the light can be all on the surface, this feature determines the LED lighting lamp is expected to achieve efficiency above 90% at the same time, through the reasonable optical design can achieve high light utilization rate. These are the advantages of LED for tunnel lighting in terms of overall light efficiency, but how to turn its advantages into practical applications, still need to solve many technical problems. LED is a very different light source, such as high pressure sodium lamp and other traditional light sources, for tunnel lighting can not simply replace the existing light source with LED, can not simply lit LED that is used for tunnel lighting. How to integrate the various components of the LED tunnel lamps to achieve the maximum utilization of the light flux of the light source, and then maximize the realization of lighting energy saving is the challenge we face. Tunnel lighting lamp life tunnel lighting as a result of 24 hours lighting, a year that is 8760 hours, continuous lighting for about 35 thousand hours for about 4 hours. Due to the replacement of lamps in the tunnel is very troublesome, therefore, the requirements of the tunnel lamp life is very high. The main factors affecting the life of the lamp is the light source and ballast (LED), lamps and glass and other long life. The traditional light source includes fluorescent lamp, metal halide lamp, high pressure sodium lamp, and the lamp life is shorter than that of the ballast. In LED lamps, the lifetime of LED devices is very long, and the lifetime of the LED devices is more than 30 thousand hours. Therefore, the lifetime of the drive has become the bottleneck of the whole life. The traditional light source, electrodeless fluorescent lamp as a variant of the fluorescent lamp, long life, generally more than 50 thousand hours, but the lighting for high frequency AC signal, ballast corresponding technology is more complex, so the life is a major bottleneck. The application market of LED tunnel lights from the development track and production technology of LED market development point of view, the restriction of LED as the light source to promote higher price, problems will be solved step by step, application will LED in a variety of lighting in the gradually popularization and deepening. According to industry analysis, LED's price decline is down half every 24 months. Therefore, with the rapid decline in the price of LED, compared with the traditional light source, lighting efficiency advantages of LED produces high, easy to use, good environmental protection, long life and other characteristics will be more prominent, especially in the field of tunnel lighting including directional lighting will spread rapidly. At present, LED is mostly used in mountain highway tunnel. The application effect of different applications, there are still many problems, such as light, high junction temperature, the lamp structure is not reasonable, lighting uniformity, driving power, life quality is uneven, so in the design of tunnel LED lighting application needs to strengthen the system of research, gradually formed the technical standards, to ensure the feasibility of the application of LED in tunnel in engineering.