The UC35 generates 960 lumens in its highest mode. An XM-L2 (U2) LED is fitted in a smooth reflector under a toughened, ultra-clear glass lens for the highest quality beam pattern possible. The attention Fenix pays to delivering even illumination is one of the many factors that have made their lights the go-to choice for everyone from military personnel to back country explorers, to industrial workers. On top of this unparalleled performance, Fenix also ensured this light would remain reliable under even the harshest conditions. A hard-anodized aluminum body, machined grips, O-ring seals, and other premium materials provide resistance to water, corrosion, scratches, and impacts. The light is activated by way of a tactical tail-switch and can be cycled through modes using the side-switch located near the bezel.