Here's what I have so far. The rest of the room
has yet to be converted. The new roundels emphasize the difference in
backlighting between the wall and corner panels, which I will need to sort
out now.

I
don't think I've put up any other pictures with the main lights turned
off. The downward lights remain on in the evening under computer control, or
whenever I just need less light and heat. It's easier to see the roundels
when they're not back-lit. There were a few occasions during the show where the
roundels were not backlit.
