12-volt lights ???

[BigBlock]

only that I am quite aware of their prices

So you have at least $10,000 laying around for this project? I find that hard to believe...

also, my original question was about any 12-volt lights that WOULD be usable ... replies telling me what WON'T work, are useless

That's because there are no 12 volt lights that ARE useable. Your only option would be to use an inverter and normal 120v lights, but I know you'll never get that far.