Generally, in order to act in concert with police to track and monitoring with the car, drivers must turn on the automotive license plate light which is used to illuminate the license when driving in the black or night. Screws bulbs installed above the car rear license, who can not only illuminate the license, but also decorate the car. In accordance with the relevant provisions, all the vehicles driving at night must turn on the car rear license light. Under the conditions of the normal sight, the brightness of car license light must be enough to see the license number clearly within 20m. Moreover, the car license plate light must be controlled by the same switch with the running light.
By the use of materials, there are gas automotive license plate light and LED license plate light.
The common gas license plate light is W5W C5W and H5W. Gas license plate light own mature technology and low price, it will produce radiation and contain mercury, whose shell is made of glass, easily to broken and pollute the environment.
LED license plate light is no radiation, on pollution and life long, theoretically, it can be up to 50000hours, in other words, it equals to the life of the vehicles. However, its high price have an impact on its widely used. It is only widely used in the development country.
By the types of socket, there are C5W,W5W,H5W license plate light. All of their power is 5W.
H5W,length is 33.0mm,bulb diameter is 9.0mm,lamp holder is BA9S. End product is globe light.
C5W, length is 35.0mm, bulb diameter is 10.5mm, lamp holder is SV8.5. End product is festoon light
W5W,length is 26.8mm,bulb diameter is 10.29mm,lamp holder is W2.1*9.5d. End product is wedge light
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