Streamlight Knucklehead FlashlightÂ is a flexible work light designed to put light where you need it. TheÂ Streamlight KnuckleheadÂ is a lightweight, hand-heldÂ flash lightÂ with a 210 degree articulating head that rotates a full 360 degrees. ThisÂ Streamlight flashlightÂ features the latest in dual C4 power LED technology, microprocessor controlled high and low intensity modes, emergency flash and a low-light, low-power moonlight mode. TheÂ Streamlight Knucklehead FlashlightÂ is built with dual wide pattern parabolic reflectors inset into larger textured reflector, to provide a smooth flood pattern for close-up work. Optimized electronics provides regulated intensity over the life of the battery.