I have three 4xAA lights that I can think of right now.
http://img209.imageshack.us/i/4aafront1544.jpg/
To the right of the Dorcy labeled "Turtle Light" is the ProPoly 4AA which is much brighter, with more throw, than the Turtle. It runs three plus hours in regulation before dimming [at a medium rate].
On the far right is a UnderwaterKinetics [UK] 4AAeLed which has a nice wide angle beam, and about 2/3 the output of the ProPoly. It throws about half as well as the ProPoly. It runs ten plus hours in regulation, with a slow decline after that, making it great for camping among other things. AFAIK the 4AA eLed is no longer produced, UK now makes a similar light with [at least] two stages, the low being the same output as my 4AA eLed.
All three lights are good battery vampires, with the UK eLed being exceptionally good at that. All three are very water resistant, and all have very good tints.