A headlight is a light, usually attached to the front a moving vehicle such as a car, with the purpose of illuminating the road ahead during periods of darkness.
Modern headlights are electric flood-lights, positioned in pairs, one on each side of a moving vehicle. Headlights are usually combinations of multiple lamps and reflectors and can be switched between the standard and high beams -- the latter casting brighter light at a higher angle, allowing the driver to see further away, but at the cost of potentially blinding drivers of oncoming vehicles.
A headlight can be mounted on a bicicle, and most other moving vehicles from airplanes to trains tend to have headlights of their own.
Headlights usually have a distinctive shape with a light bulb positioned in the middle of a reflector cone.
