I suggest starting off with the smallest (cheapest) light in his store.
The single LED rock crawler flood light comes in at $45, and it should have the same electronics as the big ones because it uses the same CREE LED.
http://okledlightbars.webs.com/apps/webstore/products/show/3654359

So far you guys have $30 pledged to the experiment, with only $15 to go.
I can do the test but I'll need to O/H my top end beforehand (planning on it in the next few weeks anyway).
However, I don't have any special equipment for the test, and anyone with an LT could splice the LED into the headlight wiring and accomplish the same thing.
For that matter, anyone with an old school 12V AC lighting system could test it out (banshee/blaster/250R/etc.) provided the voltage regulator is still in good shape.
Easy enough to tell, if your headlight isn't blowing out every time you hit the switch, your regulator is probably working fine...and the LED is capable of handling 32V, so I doubt there would be any problem in any case.