The Oblong Red Clearance Trailer 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 mounting screw and has a single lead wire to connect to a DC power supply. It provides a snap-on, scratch resistant lens that is easy to use. The clearance light features durable plastic corrosion-resistant housing with built-in drain holes to withstand extreme weather.