Surefire G2X Pro, Flashlight, Dual-Output LED 600/15 Lumens, Polymer Body, Aluminum Bezel, Yellow, Inlcudes Constant-On Click-Type Tailcap Switch G2X-D-YL The G2X Pro is a compact yet powerful polymer-body flashlight that uses a high-efficiency LED-virtually immune to failure since there's no filament to burn out or break-to provide two light output levels: a brilliant" penetrating" perfectly pre-focused 600-lumen beam" and a 15-lumen low-output setting that lets you greatly extend the runtime per set of batteries" an invaluable option when you find yourself miles from civilization. Press the tail cap 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 tough Nitrolon(R) polymer body is smoothly sculpted for a comfortable" secure grip and resists scratches" abrasion" and corrosion. A polycarbonate micro-textured reflector delivers a comparatively wider beam with generous peripheral light.