Hello!
One simple thought concerning the metal-halide light and UV light. It may be that this type of light source "drives" solar panels better, because solar panels "process" UV light and convert that into electricity. I heard from somebody that solar panels work in cloudy weather, as long as there's UV light bursting through clouds and hitting them.
By the way, some really interesting episodes will come shortly and boy I can hardly wait. You have just the right equipment to test the stuff I'm working with and that's great. We'll all be able to learn a lot.
