With a little work, you can have two LED video lights for less than $200 and they will last for several dives. 
DigitalAquamarine.com

DigitalAquamarine.com
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I loved the fact that my original halogen lights had the batteries encased within the light housing. When I moved up to HIDs, there was a separate battery pack and light heads, requiring waterproof cables. These cables got in the way, occasionally even flopped down into the frame and eventually one abraded and had to be replaced. Now that I'm looking for LEDs, I'm going to go with a system that has the batteries inside the light housing again.
All I have to do is research which one. Dean, are your test results available anywhere on line? Your link to divecritic doesn't work for me from your sigfile or from your other website.