1. Low light decay: If the heat dissipation conditions are good, the LED will have positive luminous decay in the first 10,000 hours, 3%-10% in the first 10,000 hours, and 30% in the first 50,000 hours, which is far lower than ordinary road lighting sources. Luminescence is more stable.
2. High color rendering: general LED color rendering is about 70～80, if three primary color phosphors are used, it will be higher; general high pressure sodium lamp is 20～35, low pressure sodium lamp is lower, so even the traditional light source has high brightness It is better than LED, but the visual effect is worse than that of LED. "Not the brightest, but the clearest to see." This should be a direction for the development of LED light source applications.
3. Life: The life of LED is higher than that of general road tunnel lighting sources, and it is generally higher than 50000H now.
4. Price: Although the current price of LED lamp holders is higher than that of traditional lighting fixtures, with the maturity of manufacturing technology, their prices are currently falling sharply. The price of a set of high and low pressure sodium lamps is generally around 2,000 yuan, and its cables and other accessories The price is higher than the cost of LED cables.
In addition, LED also has the advantages of high maintenance factor, good safety performance, no flicker, energy saving and environmental protection.
The tunnel lighting technology in my country started late, and the research and development of LED products lags behind foreign countries. However, in recent years, domestic lighting companies have actively improved their independent research and development capabilities through external cooperation and exchanges, which has greatly promoted the development of LED lighting in China. Among them, the energy-saving research of LED tunnel lights has made a major breakthrough. Not only has the efficiency of LED light sources been improved, but the overall efficiency of LED tunnel lights has been improved through the design and research of LED lamps and reasonable multiple light distribution. At present, there are large-scale Spark LED tunnel lighting project cases and demonstration models in China, and most of them have received good responses.