The difference between LED traffic lights and traditional light source traffic lights

Update: 2021/02/19
Summary:

According to the classification of light sources, traff […]

According to the classification of light sources, traffic lights can be divided into LED traffic lights and traditional light source traffic lights. However, with the continuous application of LED traffic lights, many cities have begun to use LED traffic lights to replace traditional light source traffic lights. So what is the difference between LED traffic lights and traditional light source traffic lights?
   The difference between LED traffic lights and traditional traffic lights:
   1. Use life:
   LED traffic lights have a long service life, generally up to 10 years. Taking into account the impact of the harsh outdoor environment, no maintenance is expected, and the life expectancy will be reduced to 5-6 years.
   Incandescent lamps, halogen lamps and other traditional traffic lights have a short service life. Replacing the bulb is troublesome. It needs to be replaced 3-4 times a year. Repair costs are relatively high.
   2. Planning:
   Compared with traditional light sources, LED traffic lights have obvious differences in optical system planning, electrical accessories, heat dissipation measures and structural planning. Since the led traffic signal light is a picture light plan composed of multiple led lamps, the layout of the leds can be adjusted to form a variety of pictures. And it can integrate various colors and various signal lights into one, so that the same light body space can provide more traffic information, equipped with more traffic plans, and can also form a dynamic form by switching different parts of the LED The form of signals makes traffic lights more humane and vivid.
  Traditional light source traffic lights are mainly composed of light source, lamp holder, reflector and transparent cover. In some respects, there are still some deficiencies. It is impossible to adjust the layout of LEDs like LED traffic lights, thus forming various pictures. These are difficult to achieve with traditional light sources.


   3. No false appearance:
   The emission spectrum of the LED traffic signal lamp is narrow, the monochromaticity is good, and there is no filter, and the light of the light source can basically be used. Since it is not like an incandescent lamp, you have to add a reflective bowl to make all the light go forward. In addition, it emits colored light, does not require colorful lens filtering, and handles the false appearance and chromatic aberration of the lens. It is not only 3-4 times brighter than incandescent traffic lights, but also has a greater viewing distance.
  Traditional light source traffic lights need to use filters to obtain the desired color, so the light utilization rate is greatly reduced, so after all, the overall signal strength of the signal light is not high. However, the traditional light source traffic lights use colorful chips and reflectors as the optical system to reflect external interference light (such as sunlight or lights), which will cause people to have an illusion and mistakenly believe that the non-operating signal light is in the operating state, that is, "false appearance" , May cause trouble.

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