This is the only hovercraft flashing light that is certified by the U.S.C.G. It can be seen up to 2NM and is to be used when the hovercraft is in non-displacement mode. It uses a LED, lasts up to 50,000 hours and is very energy efficient. The light is waterproof, compact, tough, and is hard coat anodized aluminum. Mounts with a 1/4-20 bolt from underneath and the wire exits from the bottom side of the light.