The housing is the hard-plastic cover that you see when you are looking at a vehicle head-on. The regular beams are what is activated when you turn on your headlights or use your daytime running lights. High beams are brighter bulbs used when the road is especially dark and lacking other traffic. Automotive lamp housing refers to the outer shell of automobile lamps, usually made of plastic, glass or composite materials. It is used to surround and protect the internal components of vehicle lamps, such as bulbs, reflectors and lenses.
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