Our Hood Lamps come complete with the housing, socket, bulb and wire. Hood Lamps were factory installed as standard equipment on some models and were optional for others. They were also offered as a dealer installed option back in the day. The light is mercury activated, so just open the hood, and presto...you've got light. Easily installed, simply attach the light to the underside of the hood and run the lead wire to your horn relay for power.