This is the one you want - there is nothing better!
http://www.zebralight.com/H600-Mk-III-XHP35-Cool-White-18650-Headlamp_p_187.htmlAnd the batteries you need:
https://liionwholesale.com/products/panasonic-sanyo-ncr18650ga-flat-top-1?variant=12534245700And this glow-in-the-dark mount is really nice...
http://www.zebralight.com/GITD-glow-in-the-dark-silicone-holder-for-H600-H602H603_p_76.htmlOnce you try this setup you will laugh at your friends with cute little 80 lumen lights. And it is adjustable from the lowest lows to the highest highs. Trust me - this is military-grade equipment!