The HELLA LED Rocker Switch lights up when the switch is in the "On" position. This switch is available in various colors to help distinguish between applications. The HELLA LED rocker switch is a flush-mount switch that mounts in a round hole and includes three terminal connections. This rocker has a max load of 12V/20A, three 3/16-inch blade terminal connections, and measures 3/4 x 1-3/16 inches (WxH) at the switch base.