I use the DIY LED setup outlined in this thread over at AutoGeek:
DIY LED Work Light (much better than halogen!) - Auto Geek Online Auto Detailing Forum
And it IS much better than the halogens. It's absolutely BRUTAL for finding defects. My main complaint is the stand doesn't go high enough and it's pretty light weight. I'll be replacing it with a better one soon.
this. cheap, easy, amazing.