Aqua Signal s Series 20 Navigation Lights are specially designed for motor boats up to 39 (12m) in length. These lights are easy to fit and install. Each light offers a visibility up to 2 nautical miles. Starboard port and bi-color lights offer visibility up to 1 nautical mile. Each light includes one mini BA9S 12V/5W valve bulb. Side or deck mount design. Black or white polycarbonate housing and lens are non-corrosive non-magnetic impact and shock-resistant and seawater resistant. IP45 protection degree.