I purchased a Brassavola Nodosa about 4 weeks ago and we have had nothing but rain since then. It is in a south facing window under T12 daylight light bulbs about 6" away. We finally have sunshine this week

and the leaves are turning purple on the edges and on the back of some of them. I'm thinking that is a good sign that they are getting the light they need (no signs of burning). Just looking for a little reassurance.