Lights too strong for corals?

[LeanneP]

I have been having some phosphate issues with my tank so my corals are not doing well but I have also noticed that they are closing even more when my halides are on. I replaced one bulb a few months ago and the other about 6 months ago. They are 250 watt 13000 k for a 90 gallon tank. Is this too much? I have them only on 4 hours a day. I was going to do them for longer but the corals don't seem happy with them on.

Leanne