Cyclops Brontes 2K Full-Size Flashlight - Constructed from Aluminum Alloy 6063-T6 with a CREE XHP50.2 20W LED, gives this flashlight a massive 2000 Lumens of light output for a consecutive 2 hours. Running on 9 - AA batteries. Light Source: CREE XHP50.2 20W LED Power Source: Energizer AA – 9 included Anodized Finish Switch: Tailcap Water Resistance: IPX7 Twist Focus