Here's a question for those "in the know". I'm going to use four 1000w MH above my 16'L x 6'W x 3'T concrete tank. I'm going to run these lights about 5 hours a day. The rest of the "day" I'll run three 175w MHs. Since it is a South American Biotope and most of the fish prefer subdued lighting would it be worthwhile to buy 5500k bulbs to replace the 10k bulbs that come with the Reef Sun MH system?