Check out the Fenix brand double A model. I've got the LD-20 LED Tactical. 190 Lumens & weighs next to nothing. Its just as bright as the models that use the 123 type batteries & I think the AA battery models get more battery live, ie burn time + batteries are much cheaper!!!
I also bought the single AA model. It's 100 lumens bright & I can clip it on my hat when walking to my deer blind in the dark. It's the Fenix LD-10 model.
I'm kind of Flashlight addict. I've tried about every brand out there from Surefire to Sreamlight. I think the Fenix line is the best by far for brightness, durability, & quality by far!
I keep a Fenix AA model LD-20 in my hunting pack, truck, nightstand, & on my 4 wheeler. I also carry the single AA model LD-10 I'm my pocket or jacket at all times. All my hunting buddy's & friends that have tried mine have ordered one the next day! And all my huntin pals are a pretty skeptical bunch. Not to mention being pretty tight with their money, even though they could afford any flashlight they wanted.
Check out the
http://www.batteryjunction.com/ web sight. They have great prices on flashlights & batteries & stock about every brand made. They have fast free shipping & great service. You won't regret buying a Fenix & will be ordering another after you try your 1st one. Hope this was helpfull.