I couldn't be happier that you're so pleased with the light and already enjoying it so much! It's been in my safe for years and isn't something I would use other than to admire the quality and technology, especially when it was introduced. It's a truly unique gem but robust enough to use for tasks, as long as it isn't dropped, since the bulbs are somewhat delicate. Electronically, these things are almost bulletproof and the ballast will handle a lot of voltage. Although not recommended, it will actually work on 4 x 16340's. I ran my first JiL HID on a mix of CR123's, 3.0V RCR123's and AW RCR123's 4.2V and it always did great. Also, I had a local friend who purchase one because I did and he ran his exclusively on 4.2V RCR123's without issue. CR123's of course will work best.
Thanks again Archi!