I have all my orchids on a baker's rack on my deck except for my Phals. The Phals are inside in a southern window shaded by trees. The outside orchids get morning sun and then it's shady for the rest of the day. The Phal's leaves are dark green, should I move them outside with everyone else?
Not all Phal leaves are the same color - some are naturally light green and some are naturally darker green.
Do the Phals bloom in their current location? If they do then the light is probably fine. If they haven't bloomed in over a year, then some morning sun might increase your chance for blooms.
I have two of the same hybrid; one in a west facing window, the other in a north facing window. The western one does have lighter green foliage from higher light, but both bloom. I also had another in the north facing window that had light green foliage - that one just had normally lighter green foliage ...