3-mile, 360 illumination. USCG certified for use on freshwater and saltwater boats up to 65.6′ (20m). Simple, sealed, one-piece lens. Concealed, protected wiring at the base. Uses two festoon-style 8-watt lamps. Easy to install, requires (2) #10 S.S. screws. Will collapse and not break if accidentally hit. Includes a LightArmor horizontal base and is packaged with a rail mount adapter (#91367).