it wont just be the brightness. your about to see stuff happen in your tank you never thought you would.
corals will color up like crazy, most will start to grow like weeds. your zoanthids will change to completely difffernt morphs. all sorts of crazy stuff will happen.
BTW like said above make sure you dont just start with that lighting right off the bat.
or atleast shorten your normal cycle. you can burn corals that way