What is Automotive lighting?
[[File:ExteriorLightingCar.svg|thumb|right|250px|{{Center|Head, tail, turn, and marker lights (''[[Subaru Outback]]'' pictured)}}]] The '''lighting system of a motor vehicle''' consists of [[light]]ing and [[wikt:signal|signal]]ling devices mounted on the front, rear, sides, and in some cases on the top of a [[motor vehicle]], and lights the [[road]]way for the [[driver]]. The lighting system also makes the vehicle more [[Visibility|visible]], especially in low [[light]] conditions. It gives warning to other drivers and [[pedestrian]]s of a vehicle's presence and direction of travel. [[Emergency vehicles]] usually carry distinctive lighting equipment to alert drivers and pedestrians of their rapid movement during an emergency. == History == Vehicles have had lights for well over a hundred years. [[Candle]]s lit [[Horse-drawn carriage]]s.<ref name=Wordenweber95>Burkard Wördenweber, ''Automotive Lighting and Human Vision'' (Berlin; New York: Springer, 2007), pp. 95–96</ref> The first [[car]]s, then called ''horseless-carriages'' were lit by [[Gas lighting|gas lights]]. By 1908 [[electric light]]ing began to be used on [[motor vehicles]].<ref name=Wordenweber95/> [[Red]] tail lights and [[yellow]] [[brake]] lights were in use by 1915. Sealed beam headlights were used starting in 1936.<ref name=Wordenweber95/> By 1940 turn signals were used. Before 1939, headlight design was not standardised. Between 1940 and 1956, all vehicles built in the U.S. were required to have 7’’ round headlights (sealed beams). As of 1956 and up, it became possible to install 4 headlights on 1 vehicle (2 lights per 1 side).<ref>{{cite web|title=A Brief History Of Sealed Beam Headlamps In The U.S. |first=Michael |last=Grayen |url=https://www.carid.com/articles/brief-history-of-sealed-beam-headlights-in-us.html |date=22 April 2015 |publisher=CARiD.com}}</ref> In 1960 the first [[halogen]] lights were used on [[Europe]]an cars and the technology came to the US by 1979.<ref name=Wordenweber95/> Replaceable car light bulbs were in use in the US