The Development Process Of Led Traffic Lights

After decades of skill improvement, LED's luminous efficiency has been greatly improved. Incandescent lamps, halogen tungsten lamps have a luminous efficiency of 12-24 lumens/watt, fluorescent lamps 50-70 lumens/watt, and sodium lamps 90-140 lumens/watt. Most of the power consumption becomes heat loss. The improved LED light efficiency will reach 50-200 lumens/watt, and its light has good monochromaticity and narrow spectrum. It can directly declare colored visible light without filtering. Nowadays, all countries in the world are rushing to improve the research on LED light efficiency, and their luminous efficiency will be greatly improved in the near future.
With the commercialization of high-brightness LEDs of various colors such as red, yellow, and green, LEDs have gradually replaced traditional incandescent lamps and tungsten halogen lamps as traffic lights. Since the light announced by the LED is relatively concentrated in a small solid angle range, no reflector is needed, and the declared light does not need a colored lens to filter, so as long as a parallel lens is generated by a convex lens or a Fresnel lens, then The pincushion lens allows the beam to be diffused and deflected from the head to meet the required light dispersion, plus a hood.