Type Stern Height" 2.5 x 2.9 USCG approved for power & sailboats up to 39' (12 meters). 1 nautical mile visibility for port/starboard and 2 nautical mile visibility for all-round, masthead and stern lights. 12V/10 watt. All housing parts are non-magnetic polycarbonate. 10 W Festoon bulb included. Available in 24Vspecial order only.