The Blazer B488ARB dual-bulb fender light in red and amber is designed to conform to applicable US FMVSS108 and Canadian CMVSS safety standards for clearance lighting. The bi-colored lens functions both as a forward-facing amber clearance and rearward facing red marker. The two-bulb design maximize light output. Light measures 3-15/16" W x 1-1/4" H x 7/8" D and mounts on standard 3" centers. The housing and polycarbonate lens are sonic welded to create a fully sealed light, extending the life of the light.