Here's a Tolumnia that I got from my mother. She was getting rid of some of her collection to focus on Phals, while I like to have a few of everything. It was potted in moss, then bark, and neither were making it happy. I put it in semi-hydro as a simple test. At first, it seemed to suffer, but now it's happier than ever! Two spikes, one flush with eleven flowers.
It sits on a Western windowsill where it gets lots of light, but never direct sunlight.