Along with the rapid development of LED technic since middle 1990s, In so many cities, more and more LED traffic lights are used to replace the incandescent or halogen light bulbs.The LED traffic lights are buildup with an arrange of LED components.



There are many obvious reasons, why people want to select LED traffic lights:

- Much greater energy efficiency, about a 20 Watts LED light is enough instead of a 100 watts Halogen bulb, and the LED traffic lights can be solar-powered.

- LED traffic lights have much longer lifetime. light bulbs in conventional traffic lights are changed every year, but LEDs can be expected to last up to 10 years they would avoid up to 8 maintenance visits over their lifetime. That save a lot of money and time.

- Brighter illumination with better contrast against direct sunlight, as the LED elements are arrayed across the entire surface, making it brighter overall.

- The ability to display multiple colors and patterns from the same lamp. Individual LED elements can be enabled or disabled, and different color LEDs can be mixed in the same lamp

- Much faster switching.

- Instead of sudden burn-out like incandescent-based lights, LEDs start to gradually dim when they wear out, warning transportation maintenance departments well in advance as to when to change the light. Occasionally, particularly in green LED units, segments prone to failure will flicker rapidly beforehand