As a public safety diver I routinely dive in far less than ideal conditions and have had other lights (canister and wrist mount) fail at the worst times. Let me start by saving I dive on the south east coast in black water to recover evidence, bodies, vehicles, etc. On the best days vis is 6-9 inches in some of these sediment rivers and ponds stained by tannin. No matter what I’ve thrown at this light (Depth, Temp, Hasmat, Dragging it across oyster beds/rusted car frames) it has not failed me, I have dived an entire night long dive mission and this light just keeps going. The beam pattern is tight, and on the low setting I don’t have an issue with backscatter. As divers we’re always buying dive gear and imagining ways we can modify or improve its performance… Well not this light, I haven’t found a thing about it I would change, and I’ll be replacing my other lights with Light Dude lights.