The Hella Rubber Work Lamp is a popular model for use as a backup light, mounting on the sides and rear of roof racks, on the frame under the vehicle as a "rock light" to see under and around the sides of the vehicle when on the trail at night, or anywhere you need a good flood light. It uses a 55W 12V H3 bulb that is replacable, and the durable rubber housing deflects trail hazards very well. Sold each, no harness or switch included. With the very economical price point, pick up a couple for your vehicle today!