Cattleya iricolor flowering progression
 

I thought I'd post a series of pics showing the progression of flowering of C.iricolor, since I noticed buds in one of the sheathes when it was backlit. Here's a pic the day I discovered the buds, 5/13:

And here's one from 5/15. This is my kind of progress:

Gotta love it when the plant is eager to open those flowers!

5/16:

Looks very good, and the plants as well!

Are you using the LECA in a traditional growing method? I do not see reservoirs for s/h.
And also, is it after-sunset-greenhouse-light or is that a grow room with artificial light?

It's one of my winter set ups. Tthe plants are in regular terracotta pots with leca. They sit in a tray of water. The lighting is repurposed led reef lighting. As soon as the blooming is over the plants will be moved outside for the he summer.

5/18:

Wow, so quick!

And 3 more surprises in the background! :D

5/19 Just a comment on the fragrance of C. iricolor. The area it's blooming in also has my nobilior in bloom, and from first light until 10:30 the whole room smelled like nobilior. The nobilior blooms still have a strong fragrance up close, but the fragrance in the room (and the whole upstairs) is all iricolor!