C.E. Smith 40" Post Guide-On With L.E.D. Lighted Posts [27740]40" Post Guide On With LED Lighted Posts Post Guide Ons allow you to see the location of your trailer when it's underwater. Equipped with long lasting, waterproof and shockproof, one piece red and amber LED lamps. The LED lamps make it easy to see your trailer's position when backing down the ramp and dramatically increase your trailer's visibility over the road at night. Amber light faces front, red faces rear. Features: Mounting hardware and wiring