Both of mine are in a south facing bay window with supplemental lighting. By high light I mean full sun. Only the end of the spike exposed to the sun is blasting. The part behind the mount is OK for now. That's why I think sun may be a factor in my case. Also, I agree with shakkai that in a pot it seems to respond better. Same species, same window, one mounted, one not. The potted one is hands-down the better performer. For me, S/H is a non-issue. I don't see the point and I haven't had any success myself - not to badmouth the process of growing, just it's not for me. These guys need to dry out the roots between waterings. Constant water will certainly lead to rot (I think.) Just my
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Ross
http://orchids-ross.blogspot.com/
I don't do most Dendros or large, "floofy orchids". For me it's minis (like Angraecoides), Masdies, Paphs, and others that crept in somewhere along the line. See my orchid list for complete collection (usually not current.)