I would be careful with moving to high light quickly. I am running 400W halides and have had great luck with many tough corals (dragon, shortcake, hoek, etc.) but put my monster mid-tank (with no dip from a trusted/known friend) and had it bleach within 24h. 2nd frag (different friend) same issue. Both are SLOOOOOOOWLY recovering on the sandbed, IME, work up towards top of tank, but slowly (ESP. If high wattage MH).