The waterproof construction of this light makes it ideal for use on trailers that may be submerged, like a boat trailer. The circuit board is sealed, which means that water will not damage the diodes or circuit board. 8-3/8" x 5-3/4". Low-profile LED trail light serves 3 functions: stop, turn, and tail. Durable polycarbonate housing and lens. Surface mount - hardware not included. 3-Wire design. OEM replacement. DOT Approved. | Valterra 8" Oval 52 Diode LED Light in Red