This thread is hilarious. I believe poster's choice to basically be the best, but recommend getting the fivemega E head E tail, running 18350, and get a Tad Customs' E socket using one of two lamps, either A3712 or A3718... different extreme brightnesses for Li-ion secondary voltages. I think the A3712 is probably about 40-50 lumens during most of the runtime of a 4.2V IMR, and that would be about an hour on 1200mAh 18350. The A3718 is brighter with I believe about 40mins. runtime on the same cell.
Since the OP is new here, we should stress becoming educated about Li-ion safety and best practices. There is a lot of energy packed in these little cells, and thus inherent danger, and they can and have injured and killed people. Don't become a statistic. Become experienced instead.