Cool video and cool light. We are in the age of LED's, but for those folks who are extremely addicted to flashlights and seek more punch... Meet the HID (high intensity discharge) lights:
1500 lumens and somewhat compact:
http://www.batteryjunction.com/24whidposupo.html
3200 lumens but bigger (8 lbs.):
http://www.amondotech.com/index.asp?Pag ... rodID=1129
HID tecnology is the same thing that powers street lighting... For example a regular 150 watt incandescent bulb screwed into a typical light socket might give you 1500 lumens whereas a 150 watt high pressure sodium (HPS) HID bulb paired with the ballast and starter will put out 15 thousand lumens (a typical security/barn light). Now, I just made up those numbers but the difference is astonishing. This is why the above flashlights are so dang bright.
These lights are typically too big most caving, however it would be worth taking to a place like Tumbling Rock Cave's massive Topless Dome. I am going to Lost Creek Cave (here in TN) tomorrow. I'd love to have one of these to check out the big rooms.