Add a little light to your darkness. 55 watts of halogen light, protected by a weatherproof ABS housing, mounts easily on the exterior of most horse trailers, cargo trailers, flat bed trailers, headache racks of your truck, or even on your ATV cabs. Shines a broad, bright span of light with a flip of a switch (switch not included). Adjustable 1/2" mounting bracket also included. Requires a 1/2" hole in trailer to mount and wiring can be connected to existing clearance lights or constant hot wire. Both applications require a switch and a 12 volt battery source. Bulb is replaceable.