Solar Recharging Automatic dock lighting provides 360 degrees of lighting. Ideal for identifying docks, navigation aides or obstructions at night; Turns on automatically at dusk. Flashes 2 times every 2 seconds. Visibility up to 2 miles. Flashing Mode Only; Heavy duty clear ABS plastic case – Fully waterproof and weatherproof. IP65 rated; Mounts several ways – Underside flange (hardware included); Armour – Center threaded pipe or flange mounted; a bright fully automatic re – chargeable navigation and dock identification light. Large 6 Diameter Solar Panel.