I keep three AA lights available, a 4xAA UK eLED, a 1xAA Gerber Infinity Ultra and a Fenix L2D CE, one of the new Fenix lights using Cree LED's. It's a quality light, with multiple settings from low(9 lumens) to really high(135 lumens), SOS and strobe. The Fenix could probably do the job of either of the other two lights although the Gerber is smaller and the UK has a great runtime with its 4 AA batteries. The Fenix is a great light though. For the money I'd buy the Gerber in a 1xAA size. Once you size up to the 2xAA the Fenix gets more worthy of the price tag. YMMV