Tank - Full Summary

This is my second post. My first was about lighting. My current set up is a 55g fish only tank right now(due to lack of necessary lighting), and I have a CPR hang on the back refugium/skimmer which is 4.7gallons. Nitrates are <1ppm with this set up and I am pretty happy. As far as the lighting goes, I think I am gonna go with T5's. My specific question is will an 8x54watt fixture be too much for my tank? I just want to be able to keep sps and lps. I will try to post pics soon.