I've been keeping my eye on the development of these LEDs as potential "work-lights" for the last 2 years. I'm in communication with several researchers and developers here in UK. I have had to "bone-up" on my physics on this.
Lite Panels have a rather jolly set - price is restrictive for me. These links got me going:
There's a flood of cheap LEDs coming out of China, look on eBay. I have many LED torches that use them, grat for torches or worklights but they're nothing like the selected Luxeon LEDs that go into Lite Panels. Just looking at one of my LED torches every LED is a slightly different 'white'.
Bob.
Those prices are ridiculous. You'd be better off going to Radio Shack and buying a simple electronics book and soldering a bunch of LEDs together for about $40. I don't know the dynamics of putting these together, but I know it can be done fairly cheap and it's not rocket science either. Now I almost have an excuse to buy one of those "heatless" soldering guns, advertised on TV.
Some sort of diffuser panel in front of the LEDs would probably be a good idea. They have small hot spots, usually around 5 to 15° and the brightness falls off rapidly outside this area. All the white LED's i've toyed with also seem to be very blue in the hot spot and aren't really white until you get outside that area. A diffuser would even out the intensity and average the colors together.
I have the IDX Lite, that I did a review back in March, works great and on my 4.5Ah brick (SLA) it lasts over 5 hours switched on continuously, with no heat, an added safety item when you have kids about. Also has a dimmer on it as well
Output is about 30watss fro 11watts of power
If anything it can be a little bit blue, but not that noticeable.