The 6px pro's high-efficiency led provides two light output levels: a brilliant, penetrating, perfectly pre-focused 600-lumen beam, and a 15-lumen low-output setting that lets you extend the runtime per set of batteries, an invaluable option when you find yourself miles from civilization.Press the tailcap switch for momentary-on low, press further to click constant-on low, return to off and press or click on again within two seconds for high.The high-strength aerospace aluminum body is smoothly sculpted for a comfortable, secure grip and is hard anodized to military specifications for extreme resistance to scratches, abrasion, and corrosion.A polycarbonate micro-textured reflector delivers a comparatively wider beam with generous peripheral light.We also make a polymer-body version of this light, the g2x pro, and a single-output version with a tactical tailcap switch, the 6pxOutput: 600/15 LumensBulb Type: LEDOal: 5.20"Weight: 5.20 ozBattery: 123AProofs: WeatherproofColor: BlackHead Diameter: 1.25"Switch Type: Tailcap