I bought a Wolf Eyes Raider, about 2 mths. Back, 'haven't had a lick of trouble, 265 lumens, as purchased, nice hot spot, good flood around a slight artifact. I click the switch 'on', it lights up; I click it again, it goes out. Without fail. It's got a new module now, slightly brighter. The old mod.s' the spare. That is what a good flashlight should do, work without failure. The lens IS replaceable, shoud I ever throw it down, on the bezel. Not likely to happen.