The LED 3/4" round red clearance/side marker light meets FMVSS108 requirements for combination clearance. Its small shape is compared to the size of a penny, hence the nickname "penny light." The clearance marker is PC rated meaning that it can be seen 90 degrees off from its center, helping to make your trailer more visible from all angles. The 12V marker light contains 1 high-output LED for exceptional brightness and performance. The life of a LED light far exceeds traditional incandescent lights and draws significantly less power. The side marker light and can also be used as ID lights(3 required), utility, step well, or cabinet lights. The penny light comes with a rubber grommet and easily installs into any 3/4" opening.