Another vote for the Gerber Ultra Infinity ( with a lithium battery). It's my carry around the house light and sometime a, but not the only,GHB light. By the way, if you screw the switch "almost" on, a bit of thumb pressure on the back turns it into a "momentary on" switch. I don't do that for fear that I'll sit in such a way as to turn it on without me noticing. But it's an option I've used on occasion.