Another flashlight to consider would be ZebraLight H50-Q5 using a AA Lithium cell if wide area task lighting is prefered.
http://www.zebralight.com/index.php?main_page=product_info&products_id=183The Zebralight is very small in comparision to the size of the AA cell it uses.
With a Lithium AA cell the Zebralight gives roughly the following;
66 lumen for about 4 hrs
18 Lumen for about 20 hours
4 Lumen for about 96 hours
This compares to a typical microlight at 8 Lumen for about 4 hours.
With the Arc AAA Premium giving about 11 Lumen for about 5 hrs.