Ah yes, those are the shelves and they are looking really nice and organized there.
Very nice Dendrobiums, I love them both.
Jim, were these buggers smiling at you when you looked at them?
Don't you swear they wink at you at times.....
Those yellow spots are certainly telling you something, bugs are sucking the life out of them on the underside. I would think Orchid growing would be so much easier if it weren't for those nasties.