From the Manufacturer
The Streamlight 4AA Luxeon ProPolymer Division 1 Flashlight is a high performance, 4AA alkaline powered, super high flux Luxeon LED flashlight that runs up 4 hrs. at full intensity with 2 additional hours of declining usable light. This Streamlight flashlight features a body constructed of a Polymer Engineering resin that is virtually indestructible, shock resistant, non-conductive and light weight. It is is O ring sealed and water proof. The 1 watt, 10,000 hour, super high-flux LED provides a longer reaching, brighter beam that's 10 times brighter than a high-intensity LED with up to 3,500 peak beam candlepower (42 lumens). Ergonomically shaped for maximum hand comfort. The Streamlight 4AA Luxeon ProPolymer Division 1 Flashlight is 7-inches in length and weighs 7.52 ounces. It features a wrist lanyard connection and is available in  black.