Specifications Brightness: 30 Lumens (Diffused) Run-Time: 90 Minutes (Peak) Batteries: Two CR-123A Finish: Mil Spec Type III Hard Anodized Length: 5.5" Weight: 5.4 oz. Bezel Size: 1.25" Features 19 5-mm white LED's Aerospace-Grade Aluminum Body Momentary/Constant On/Off Tail Switch Double O-Ring Sealing Wide Beam Angle For more information please visit the PentagonLight Website.