Two mile, 225Ї light visibility. For use on boats up to 65.6 ft. (20 meters). Base attaches directly to deck with three #10 fastener. Cover and lens conceal installation fastener. Single, external, stainless steel lock screw secures cover to base. Easy disassembly for service or bulb replacement. Quasar sidelights include a standard 8 watt, festoon type lamp. All Quasar side lights come with 7" hard wire leads for connection to 12 Vdc power supply.