It looks to me like they're doing very well in that window. As long as they can produce enough energy to bloom, I think they're fine. That's a very pretty display.
ok so i'm following up on this post, i moved the Phals to a window with more light but still not direct and i have to say that i have seen immediate improvement. I re potted everything and the buds that hadn't opened are starting to open and new branches are starting to come too. thank you all for your help. i'm also watering less.