Just a quick lighting question. I generally have these 2 orchids hanging in my tree. I don't think they've been getting enough light creating low flower production. I took them and hung them where they got some direct sunlight - about 4 hours throughout the day. The leaves turned purple after a few days. So I put them back under the tree and within a day the leaves were green again. If they turned purple was that too much sun? And how did they turn green again so quickly or even at all?