In my experience, the
Jet Beam BA20 is the best value in AA lights. There are AA lights that are brighter, such as the
Sunwayman M40A (600 lumens), but it's also over 3 times the price (~$40 vs. ~$140).
The Jet Beam is brighter than the Fenix AA lights (I have two of the 180 lumen AA lights, an older model and a newer model). The Jet Beam is rated to put out 270 lumens. I don't know how accurate that is, but it is noticeably brighter than my Fenix lights. It is roughly the same size as my Fenix lights.