Streamlight 69267 TLR-1-HL High Lumen Rail-Mounted Tactical Light, Flat Dark Earth Brown - 800 Lumens C4LED technology, impervious to shock with a 50,000 hour lifetime 800 lumens; 15,000 candela peak beam intensity; 245m beam; runs 1.75 hours Engineered optic produces a concentrated beam with optimum peripheral illumination Powered by two 3-volt CR123 lithium batteries with 10-year storage life Rail grip clamp system securely attaches/detaches quickly and safely with no tools and without putting your hands in front of the muzzle