The 6PX Pro’s high-efficiency LED-virtually immune to failure since there’s no filament to burn out or break-provides two light output levels: a bright, penetrating, perfectly pre-focused 600-lumen beam, and a 15-lumen low-output setting that greatly extends runtime per set of batteries. This is especially useful when you’re miles from civilization. To operate, press the tail cap switch for momentary low, press further to turn on low continuously, then return to off and press or click 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, offering extreme resistance to scratches, abrasion, and corrosion. A polycarbonate micro-textured reflector produces a wider beam with ample peripheral light. Surefire also manufactures a polymer-body version of this light, the G2X Pro, and a single-output version with a tactical tail cap switch, the 6PX Tactical.