In winter though, all must come in. The outdoor orchids aren't under lights, but will get enough light to be OK for the 2-3 months they'll be in, given the southern exposure. They are on trays & tables to the side of the shelves that get more afternoon sun.
I just pulled everything in earlier this week...may do some rearranging, but right now it looks like this (the pic was taken at dawn, so looks dimmer than it really is):
The shelves are packed. I use baskets with pebbles and water in the bottom to raise humidity, but they also let me "pack" the plants closely together, and yet move them when needed. Oh, and some of the 153 are minis, or baby plants...so its really not as bad as you might think!