The ProClass LED Red Clearance/Sidemarker Light can be used as a clearance or side marker light on your trailer or vehicle. It increases visibility to notify other drivers of your trailer or vehicle. The clearance light grounds through the white wire and has an additional wire to connect to a DC power supply. The high visibility LED light lasts up to 100,000 hours, which far exceeds standard incandescent clearance lights. The clearance light is constructed of durable plastic corrosion-resistant housing to withstand extreme weather.