This slim metal light is small enough to carry anywhere, yet it packs a 650 lumen LED, making it bright enough to use as a primary source. Tap the recessed button to access high, low and SOS modes; the switch surround lights up with a built-in power indicator. Flat tail cap allows the light to stand up for area lighting; it is also drilled for lanyard attachment. Genesis is powered by 2 CR123 lithium batteries, which cope better with cold temperatures than alkaline cells. Genesis is designed primarily for underwater use, and as such we recommend against extended use topside, particularly in high ambient temperatures.