Guys, you're doing me proud. Thanks for all the help. I figured Craig would have the straight poop for me. So there's ONE thing I don't have to worry about. Now, onto the more practical aspects of actually getting something I can use.
1. The best price I've ever seen on Solex lights is here:
http://eclecticlighting.homestead.com/soluxfullspectrum.html $5.75 for any flavor. BUT, as I've said before, I already have plenty of those, and I don't need to go down that avenue any longer.
2. Those same guys make a really cool MR16 adapter that screws right into a standard socket and includes the transformer. See it
here.
3. My local guys at LEDeffects haven't yet impressed me too much with their communications (about every other email goes unanswered - I'm made to feel that they have far more important "big" projects to think about, instead of screwing around with my little one or two piece order. And of course, they're right). One thing is for sure - they only want to sell me a 12VDC (needs to be regulated 12VDC) product. That means it won't be plug-and-play as I'd hoped. For substantial extra cost they'll make me what I want as a "custom" unit. The Lagotronics guys say their product is specifically made for plug-and-play into a 12VAC appliance. THAT's what I'm looking for.
4. The page for the HaloLED states: "HaloLED™ is as easy to use as a conventional light source. All electrical, thermal and optical issues have been considered in the design resulting in a light source that is simply
plug and play." And then goes on to contradict that statement with this: "Units cannot be directly retro fitted to existing power supplies / transformers, Lumidrives constant current driver must be installed." I don't consider the need to add a proprietary current driver a "plug and play" device. Still, I really like the thing. Haven't had time to search around and see if I can find a price though. My guess is that they won't be giving them away.