Roughly how many lumens is this light putting out and, does the light remain relatively constant for the 5 hours (in other words, does it provide some regulation in the power supply)?
By the way, the Magic Shines from dealextreme now have a revised battery pack with a nice holder and indicator. For about $80 its just plain hard to beat. And it reportedly puts out 6 or 700 lumens (its advertised at 900).