4Sevens Quark X 123-2 Tactical Flashlight QX123-2-T is a powerful tactical flashlight that functions in eight different illumination modes and is endlessly customizable. This tactical flashlight uses CREE XM-L emitters for an extraordinarily bright beam that experiences no "tunnel vision" effect; all you get is a very bright cone of light. With a maximum output of 360 lumens, the 4Sevens Quark X 123-2 has enough power to light up most environments you'll find yourself in, but it can also be subtle. In moonlight mode, the 4Sevens flashlight just barely reaches 0.3 lumens; in this state, it can run for an amazing 25 days on two CR123A batteries. A total of eight modes can be used with the 4Sevens Quark X Flashlight: Moonlight, Low, Medium, High, Max, Strobe, Beacon, and SOS. One of the defining features of the tactical version of this 4Sevens flashlight is its setting memorization capabilities. Four quick half-turns of the bezel will put the Quark X into programming mode, where you can program two memory settings from the flashlights's eight available settings. One setting will activate when you fully tighten the bezel, and the other will be triggered when you loosen the bezel a half turn. With this programming functionality, you could have a disorienting strobe light on one preset and the flashlight's maximum output on the other to switch from tactical illumination to tactical distraction on the fly. With eight variable lighting modes, two presets, a momentary on function, and durable, long-lasting construction, the 4Sevens Quark X 123-2 Tactical CREE Flashlight is an excellent small-frame flashlight to take on the battlefield and beyond.