What actual temperatures do the “orchid ranges” correlate to?

[DirtyCoconuts]

I am having a bit of trouble finding a source for the temperatures that correspond to: cool, intermediate cool, intermediate, intermediate warm, and warm

Are they generally subjective to the author or is there a reference to the actual F or C temperatures?

I ask because I want to find some plants that fit certain conditions and it is a crap shoot sometimes




While I’m asking, anyone know of any nice minis that like 74* and 94% humidity?

Thanks