All my Phals do with higher light is make smaller leaves. It looks kind of funny but you can tell the years of plentiful light and lower light by looking at the foliage on my Phals.
A while ago I gave all my Phal hybrids away. They weren't half dead but I got kicked from the GW because I made a contest and the winner got the Phals. Actually, I made about 6 contests. Stuff like, who has the best story of killing a plant or Why should I give you this plant? Stuff like that. I did manage to give away about 25 plants before I got kicked.