with that light u shouldnt have to worry about acclimating to the light.... when i had those lights i just put everything right where i wanted it from the start
with that said the upgrade to mh was IMO my best investment so far in the hobby aside from my skimmer
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125g Reef 72x18x22 - 250w mh's/T5 actinics, MRC MR-2 skimmer, Koralia #3 & #4, Phos reactor, OR2500-return, DIY overflows, DIY 55g sump with fuge...300g in the works!