SOLAS 74/83 and USCG 161.010/6/1 approved (Floating Electric Water Light) for installation with other required survival equipment. Emits a rain and fog penetrating, 360 degree light with a peak brilliance of 250,000 lumens. Minimum 36 hours continuous operation. No tools needed to replace battery. Rugged construction resists weathering and corrosion from the marine environment. Drop tested 300 ft. into water. Automatically rights itself and activates when in water. Used worldwide by major fleets. Exceeds requirements as a man overboard light, boundary marker, underwater obstruction definition, etc. Includes patented nonmagnetic and noncorrosive mounting bracket. Battery not included. Uses LSC Battery #396.