What light set up (how many leds, what Vf, and current) are you running and what kind of AA cells are you using?

I ask, because it would be interesting to compare run times.

I am using a single 20w halogen 12v lamp (mr16), and the AA cells are rated at 3400mAh.

I got 40min of bright operation and 20min of dimming light. Then i shut down the light cause
i was worried about too much discharge. This sounds like the batteries did not perform as rated. It was the first charge and i didn't charge 4 of them fully so that might have contributed to lower run times.

My black 5x2 holder is really snug... the white 2x1 holder sucks i am thinking of making an other 12 cell holder with all black ones.