Princeton Tec Surge Dive Lights: Ergonomically designed, SURGE fits easily and comfortably in your hand. Designed with size in mind, an innovative 8 AA series/parallel battery configuration keeps battery space to a minimum while providing enough illumination for all your needs. Gram for gram, SURGE is the brightest light in the marketplace. Power: 8 Watts Batteries: 8 AA Alkaline Reflector: Wide Beam Burn Time: 3-5 Hrs. Weight: 10.8 oz. with Batteries