The SureFire Dual Fuel Scout Light Pro Weapon Light can be mounted on a Picatinny or M-LOK rail and swivels as needed—toward the rifle for a narrower profile or away from it to make room for other gear. The Dual Fuel Scout Light Pro delivers 1500 lumens when using the included 18650 rechargeable battery or 1200 lumens when using two CR123As. Runtime is 1.5 and 1.25 hours, respectively. The Total Internal Reflection lens for a bright beam with a long throw and ample surround light. The light is controlled on a momentary or constant-on basis with a push-button tailcap switch, shrouded to guard against accidental activation. Its hard-anodized aluminum housing is O-ring sealed against the elements.