While I normally EDC a AAA Fenix, I like Eagletac too. The D25A goes 1.3 hours at 200 lumens and 150+ on moonlite mode with useful mid ranges in between. All on one AA. If you run a 14500 battery, you get a blazing 900 lumens out of that little guy.

I just ordered one to upgrade my EDC because I like the flexibility and the capability for long run times. 20 hours on the 20 lumen low mode is pretty good. I have a D25C that has been modded. Moonlight mode is fine to get around in the house in the dark. The turbo mode screams out over 1,200 lumens with a RCR123.