"The C.E. Smith LED Replacement Light for Post Guide-On for Boat Trailer is great for marking where your trailer is behind your tow vehicle when backing down a ramp in the dark. The 1-piece LED light easily fits on top of your existing 2"" PVC post guide-ons (not included). Red LED light faces backward, while an amber LED light faces forward under a protective clear lens. Includes 2 sealed, 1-piece LED lamps, each with 8' of wire and all necessary electrical connectors and post locking bolts. 1-piece LED lights fit on top of your existing post guide-ons Red LED faces backward Amber LED light faces forward"