Triple Maxbright LEDs combined with Princeton Tec's proprietary optics offer unprecedented brightness and beam smoothness. 400 Lumens of pure brute power is offered with two modes of illumination; high for super bright and low for extended battery life. The light output is calibrated for both close range tasks and spotting at a distance. The Shockwave LED is engineered to be impact resistant and waterproof to 100 meters. Power: 400 Lumens, Lamp: 3 Maxbright LEDs, Burn Time: 20 Hours, Batteries: 8 C Alkaline, Weight: 1075g.