The Hopkins Towing Solutions 2 1/2in. round clearance light in red is designed to conform to applicable U.S. FMVSS108 and Canadian CMVSS safety standards. The clearance marker is PC rated meaning that it can be seen 90° off from its center helping to make your trailer more visible from all angles. The lens and housing are sonically sealed to resist corrosion and moisture. This light is ideal for trailers campers vans and trucks.