7 inch round LED headlight provides light equivalent of DOT compliant 55/60 watt halogen. This 7 inch headlight has the 3 alignment tabs that ensure proper installation orientation and measures approximately 3 inches deep from back of housing to front of retaining rim. Heat sink is fully contained within the back of the housing for clean installation. Low watt "city light" or "pilot light" feature allows even lower energy consumption if utilized. Lifespan of this bulb claimed to be 20 times that of a standard halogen.