I have a 10,000 lumen mag-lite I put together in 2007. Only runs for eight minutes per charge, but that's OK-- it's too hot to hold in three anyway. Lots of designs for such things-- and parts suppliers-- on www.candlepowerforums.com
The LEDs are catching up though.
BTW, headlights are around 3500 lumens.
The LEDs are catching up though.
BTW, headlights are around 3500 lumens.