Partsam 2PCS Red 15" 11 LED Trailer Light Bar Sealed Stop Turn Tail Park Third 3rd Brake Light Truck Trailer Clearance Marker ID Bar Waterproof Partsam ( 2xRed ) Super bright LED Surface Mount 15" light bar, completely sealed & waterproof. Each light has 11 Super Diodes for a Bright Performance; Polycarbonate lens is sonic welded to the housing. For use on heavy duty trucks (Peterbilt Freightliner Kenworth Mack Western Star), semi trailers, cargo trailers, boat trailers, work vehicles and a wide or narrow overland vehicle requiring quality DOT rated lighting. Functions as marker, clearance light, side marker, identification light, stop light, turn light, tail light and brake light. EASY TO INSTALL: White Wire - Ground; Red Wire - high brightness; Black Wire - low brightness. It all started in the summer of 2013 with a simple, with bold idea: make better auto parts. In other words, not just a better auto parts - a better way of doing things. A new kind of auto company that works hand in hand with users to do something amazing, something meaningful. Now PARTSam has grown tremendously to become one of the leading platforms of e-Commerce in the aftermarket auto parts industry. Inventory Management/Warehouse &amp; Fulfillment  With our warehouse located in Milpitas, California, we take care of the inventory management for our products. This saves manufacturers space, time, and headache. Automated Multi-Channel Sales  We successfully advertise our products on multiple platforms and maintain top-rated healthy seller accounts, which keep customers drawn to our products. We are continually expanding our customer base as we add more sales channels. Professional Seller - Customers will deal directly with us in regards to issues and concerns they experience with the products. Manufacturers will not have to deal directly with the individual customers, but will experience the benefits of their business, which is the typical win-win cooperation. Generally speaking, the light bar can be used on any wide or narrow overland vehicle requiring quality DOT rated lighting. For use on various of TRAILERS AND BOATS as: boat trailer, cargo trailer, horse trailer, car trailer, travel trailer, flat trailer, waverunner trailer etc. For use on heavy duty TRUCKS like: semi trucks, Hyundai Jeep Dodge Ford GMC heavy duty trucks and looks amazing on them. For other vehicles you can imagine as: golf cart, motorhome, RV, Camper etc. Shortly, any vehicle is suitalbe as long as the size fits. White Wire - the Ground (Negative) Red Wire - high brightness, 100% brightness, used as brake/stop light. Black Wire - low brightness, 50% brightness, used as tail/running light.