USCG approved for power and sailboats up to 39. One nautical mile visibility for port/starboard and two nautical mile visibility for all-round, masthead, and stern lights. All housing parts are nonmagnetic polycarbonate. 10-watt Festoon bulb included.
If you dont have money to waste, it is the best choice to buy this excelent Aqua Signal Aqua Signal Series 25 Classic Stern Navigation Light. I recommend to buy two of them for sure.