Interesting about the Stapelia Baja. Now that you mention it some of my larger ones have done that at the tip but not one of these small ones, so I guess I just assumed it had burned.
I'll keep watching it now that the lights are further from them and see if they at least green up more. A lot of them got pretty dark under the lights but I've seen some of them already go back to green after taking them out from under the lights to repot last week.
I'll watch the poissonii's too. I love their weird white branches and dinosaur looking leaves so hopefully they'll grow healthy (especially the one without leaves)
I wonder if placing that on the heat mat might wake it up out of dormancy.
The flowers look interesting on google. Do they show up on the circular points that the leaves come out of?