6 inch stanchion mount post that has 2 pin connectors in the base. The base slides and locks into a sliding door Perko socket. The Perko socket can be attached to any surface including fiberglass and will securely hold the light in place. The red and green running lights are generally wired serially, so that they go on when power is sent to the unit (via dash mount toggle, for example). This assembly can be used to mount to an existing Golight Radioray (GL-2000 series) spotlight or just about any light. There are several mounting holes, including 3/8 - inch mount for most HID stud mount lights, like the 24 volt equipment lights, HID boat lights or just about any brand of off road halogen or HID light.