The Hopkins Towing Solutions LED 6 in. Red Submersible Oval Stop Tail Turn Light is perfect for RV camper boat or trailer use. This submersible trailer light is DOT compliant (FMVSS 108/CMVSS) across the USA and Canada. It includes a grommet and a industry standard 3-prong plug to connect power to the light. The life of a LED light far exceeds traditional incandescent lights and draws significantly less power than traditional bulbs. The polycarbonate lens and resin housing are sonic welded/sealed to prevent moisture and corrosion (submersible). The oval light will work in under 80 and over 80 trailers - with the appropriate additional lighting required in FMVSS 108 and CMVSS standards. Pig-tails only - no full wiring harness - this item is typically used to replace an existing oval light on a trailer. Instructions are included for quick and easy installation. INSTALLATION INSTRUCTIONS:1. Disconnect vehicle battery2. Use template on reverse side to cut opening in the mounting surface3. Push rubber grommet into opening. Connect plug to light feed wires through grommet and snap light into grommet4. Attach the black wire to tail lamp circuit of the vehicle. Attach the red wire to the stop/turn circuit of the vehicle5. A good ground (-) connection is necessary. Use a file or screwdriver blade to clean away/remove any rust or paint from the metal surface where the ground is mounted. Attach white wire to ground (-)6. Reconnect vehicle battery