You are going to have to acclimate your corals to the higher intensity lighting. I would run the
MH's for only 2 hours per day for the first week. Then increase that 2 hours per day per week. For example, 2 hours per day the first week, 4 hours per day week two, 6 hours per day week three ..... About 8-10 hours per day for the
MH's should provide sufficient amounts of light.
The actinic
PC's can be run for 12 hours per day from the very start.