Kathy, I'd consider putting a light under so there some trans-lighting going on (but not too much), and at the same time, reduce the perimeter light, as it IS quite hot. In terms of framing, I'd either put it precisely at center to emphasize the symmetry, or at one of the power corners. Good idea - it's worth exploring it some more. I did something like this quite a long time ago (when slides were the medium), and THAT series is buried somewhere in one of my storage cabinets. But you might just inspire me to repeat the set.