The Davis Instruments Mega-Light Masthead Light features innovative technology and heavy-duty construction. This low consumption, portable, waterproof cockpit light with a built-in photo cell, sense dusk and dawn and automatically turn off and on when needed. Mounted on its specially designed stainless-steel masthead bracket, this ultra-efficient light marks your boat at anchor or on a mooring. Includes two bayonet-style lamps: a high-efficiency 0.110A lamp and a 0.320A bright light. Dual-function Fresnel lens projects light for up to 2 nautical miles. Comes with a 12" lead wire. ON/OFF switch and fuse holder not included.