Designed to accept industry standard 3-pin plugs, this 4" round LED light meets DOT FMVSS 108 requirements for use as tail lights, parking lights, brake lights, and turn signal lights. The light mounts flush with a compatible grommet or flange (sold separately). Each light boasts 12 high-flux LEDs operating at 12 VDC that consume 90% less energy than incandescent lamps. LEDs in this dual-function LED light increase in brightness when brakes are activated. A sonically sealed clear polycarbonate lens allows for a blended look on trucks and trailers. The weatherproof truck/trailer lights are available in amber or red.