There are three AA lights you may wish to consider. The
UltraFire C3 CREE, the
LumaPower LM31 or the
OLIGHT T15
The UltraFire is the least expensive of the three and ordering/shipping will be from DealExtreme (aka: "DX"), in China.
Most people have been satisifed with their DX experiences. I own one of these lights. I'm pleased with it. However I'm well-aware that you're not going to get the most robust light in the world for $17, shipped. And, indeed, if you look you'll find a recent thread started by a guy who dropped his C3 and now it doesn't work anymore. Other than that: My only negative is it's only got one level. It's
far too bright for close work, IMO. I like my UltraFire C3 CREE and would definitely buy it again for that price.
Next up: The LM31. I don't own one of these yet. But LumaPower has a great reputation and this light is generally highly regarded here on CPF. So I've got two on-the-way: One for a Christmas present and one for me
. Advantages over the UltraFire: Two-levels; I
expect, at about twice the price and with LP's reputation, a somewhat more robust product; and you can obtain it "locally." (Where "locally" = from here in the U.S.)
Last but not least: The Olight T15. I don't own one of these, either, but I do own an OLight T20. (The T15 is single AA. The T20 is two CR123's.) I'm pleased with my T20's performance, and expect the T15 to be about the same, just in a smaller package, maybe not quite as bright, certainly not as much run-time. Advantage of the T15: Five (5) light levels - certainly one to suit whatever your need. This is accomplished via a very nice UI. Like the LM31: The T15 has the advantage of being carried by local distributors.
The three AA lights can be fed with AA LIon batteries for longer run-times.
If you don't mind a slightly fatter, but shorter package: The LM31 has a CR123 counter-part: The LM33, and the T15 has a CR123 counterpart: The T10. You'll get more light, for longer, out of a CR123 than an AA. You'll want to buy your CR123's from someplace like BatteryJunction, tho, as they're hideously expensive in local stores.
I hope this helps. Good luck!
Jim