Streamlight TLR-1 HL Flat Dark Earth Gun Light Flat dark earth tlr 1-HL tactical weapon light/ 800 lumens; 15, 000 candela peak beam intensity; 245M beam; runs 1.75 hours Led technology impervious to shock with a 50, 000 hour Lifetime/ engineered optic produces a concentrated beam with optimum peripheral Illumination Rail grip clamp system securely attaches/mounts directly to handguns with Glock-style rails and to all MIL-STD-1913 (Picatinny) rails Includes keys for Glock-style, Picatinny, Beretta 90Two, S&W 99 and S&W TSW/ ambidextrous momentary/steady on/off switch Machined aluminum sealed construction with black anodized finish/ powered by two 3-volt CR123 Lithium batteries