The first flashlight for consumers to reach 1,000 lumens (brighter than the low beams on your car) letting you see 600 feet in front of you. It weighs 3.8lbs and is 11 inches long, 4 inches wide Light is provided by 3 white LED's. To reduce the heat produced by the LED's the entire head of the flashlight is a heat sink. The flashlight uses 15 CR123 batteries (batteries are included). The batteries will last 4-6 hours depending on the mode you use. You can have the flashlight operate at 33% or 100% intensity. The flashlight is fire resistant, impact resistant, and waterproof up to 20ft. This flashlight is meant for serious recreational users only.