Headlights are universally known as a very integral part of the car. Sure the car would run even without headlights, but all auto enthusiasts now what is important, safety. They are bright, consistent, absolutely essential and utterly fragile. Headlights are not only used at night but also in harsh weather conditions. Daylight could easily well be deflected by precipitation. Constant emergence of new technology everyday has transformed the headlight to give it more illumination at certain legal boundaries. Headlights are mounted on the front of your car, to light the road ahead of you. They have reflectors and special lenses. A headlight is usually the sealed beam construction type. This means that the filament, reflector and lens are fused together into an airtight unit. Installation and removal are easily accomplished because of prongs that fit into a wiring socket. The most popular type of headlight is the halogen type, because it provides such good illumination. Adjusting screws allow you to aim, or change the direction of the headlight's beam.