Phal in Sphag Wilting in Office

[dianecty]

Hi! Last Friday, I put a phal in my office under fluorescent lights. It was in a sopping wet sphag medium. That's why I didn't put water in the rocks under the pot.

When I came to work yesterday (monday), the sphag was completely dry, the orchid opened more flowers but some of them seem to have wilted.

I took out the sphag. There was no root rot.

Why did it wilt? Is it because our office is at 76F and a little stuffy? Is it too hot, not enough water?

I watered it today with cool water, and cut off the wilted flowers.

What should I do? The buds seems to have blasted too - limp and shriveled.

Thanks guys!!