Give the Fenix TK45 a look. Takes 8x easily available AA batteries, both alkaline and rechargeble.Can tailstand.
http://www.fenixlight.com/ProductMore.aspx?id=26#
http://www.candlepowerforums.com/vb...4-Testing-Sample)-RUNTIMES-BEAMSHOTS-and-more!
760 Lm max (2 hour runtime), 95 Lm for 22 hours (plus High mode, 312 Lm, and Low mode, 8 Lm).
I got two of these, and I would buy again. I have already tried these in the family cabin, where there is no electricity, and, well...there was a certain difference to notice between the TK45 LED flashlights I had brought compared to that old 4,5 Volt whatever-bulb flashlight that was already there.
And don't get me started on the resident kerosene lantern.
The downsides would be that there is no mode between 8 and 95 Lm. When using it as a reading light, 8 Lm is not enough, and 95 Lm is rather too much. Also, the light got a rather wide beam, so when tailstanding, it should be placed above your head or, if below, with the LEDs out of direct sight.