ive youve ever looked at the vision-x led light bars, there are some new leds coming in julyish.
http://www.luminus.com/content1519

these will make for some sweet home made lights. id be scared to buy them premade though since the vision-x things are fetching $1500ish.

i cant find it but i think i read these require 12VDC input. that would be perfect for us as we'd only need to regulate the current. so start making friends with CNC machinists and start saving block aluminum and/or large heatsinks. some nice metal reflectors would be handy too.