I've read that corals that need the intensity of MH get their needs fufilled in about 4-6 hours, after that it's purely for our own bennifit, I'd say, if you can do it, a single VHO 10,000k bulb and a couple of NO Actinics 14 hours a day, the MH 6 hours a day.
That's what I think I'll try as I set up my reef again.
Doug
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