Battery Navigation Light. Requires 4 AA batties not included . Molded one piece body construction. Shock resistant neoprene accents. Incandescent or LED available. Rated at 100,000 hours LED service life. LED uses 90% less energy than incandescent. Sealed heavy duty on/off switch. Insert molded brass threaded mounting bushings. Removable lamp carriage assembly. 6.18 x 2.53 . Mounting style C-Clamp Base Requires 4 AA batties not included . Molded one piece body construction Shock resistant neoprene accents. Incandescent or LED available Rated at 100,000 hours LED service life. LED uses 90% less energy than incandescent Sealed heavy duty on/off switch. Insert molded brass threaded mounting bushings Removable lamp carriage assembly 6.18 x 2.53 Mounting style C-Clamp Base