I've played for a couple of days with Olight SR90, one of the most powerful led flashlight in the world. I've ordered this one for a friend of mine, tomorrow it will gone. The most impressive flashlight, MRV looks like the keychain light compared to this 1.5 kilo monster. I measured about 115000 lux at 1 m, and the throw reach some 800 m.
http://www.olightworld.com/product_show.asp?id=174
Looks like david and goliath, Goliath wins I wonder if the new Mrv XML from manafont comes close.
http://www.manafont.com/product_info.php/trustfire-f15t6-3mode-1600lumen-led-flashligh-118650-p-6312?rp=091774
Wow, that Olight SR90 is a beast! 
How safe is a flashlight that runs on 6 18650s?
It looks so big that you need 2 hands.
I think the MRV is intimidated.
I made an experimental thrower based on a R2 and a 66mm aspheric lens and It runs on 1,5 A. That one reaches about 400 m in a very dark invironment (no light pollution and no moonlight). More is not possible due to the dust and moisture particles always present in the air.
It really is huge, Nice to get to play with it for a few days! :)
No guys what he's done is put the MRV in the washing machine.
To make it smaller.
Can you post a picture? I would really like to build such a light :-)
I can do better than that. I post the link to DrJones thread in the DX forum. He was the first to make one and then I made a copy of it.
http://www.dealextreme.com/forums/Forums.dx/Page.5~Forum.-209~threadid.616432
And here is my copycat.
http://www.dealextreme.com/forums/Forums.dx/Forum.-209~threadid.682759
Mini MRV
.
Honey I shrunk the MRV...