[n] any device serving as a source of illumination; "he stopped the car and turned off the lights"
See Also...
anchor light, blinker, fairy light, flasher, flood, flood lamp, floodlight, headlamp, headlight, houselights, navigation light, nightlight, panel light, photoflood, riding lamp, riding light, room light, running light, searchlight, sidelight, source of illumination, strip lighting, theater light, torch