[mps9506]

You have a 55 with 4x65 watt lighting correct?
I think that will be fine for acan's and zoo's just keep them in the more brightly lit areas.
Keep in mind for a 55 you will want 2 halides to cover all 4 feet of tank spaces. It might be better to save up and purchase a hood system or 2 pendants later on down the line. Or you might find with the livestock you have that PC's work just fine. The problem is most of us reefer's suffer from the always gotta have better complex.