I'm not looking at MH and I do not want to be able to grow anything. I'm concerned about Acans I've seen quite a few threads where people say 6 T5 bulbs burn their corals. Since I'm bulding the system around Acans I want the best possible light for them. I'm thinking about getting either a 48" 4 bulb sunpower or a 36" 6 bulb sunpower.
On the reefgeek site they recomend a 48" 4x54 bulb sunpower for mixed tanks up to 75 gal or a 36" 6x39 bulb sunpower for mixed tanks upto 85 gal.
This is a quote from IceCap about their new Reef Illuminations fixture.
"The Reef Illuminations T5 fixture with its four T5 fluorescent lamps with 4
LED LunarLites tube arrays is best suited for shallow aquariums or deepwater corals such as Acanthastrea,
Trachyphyllia, Scolymia, Cynarina, Fungia, Cycloseris, Blastomussa, etc. Don’t confuse lower light with lower quality
light. Some fixtures don’t put out much light because of poor design. We’re putting out the right amount of good
quality light for the right applications."
People keep recomending six bulbs and I do not understand why. Yes, I understand I would get more bulb choices but with the extra power I will have to raise the fixture or shorten the photo period if the lighting is too intense. That would mean I will not be able to enjoy my tank as long if I shorten the photo period. If I raise the fixture light would just spill over the front & back. So, whats the point of getting six bulbs if I'm just lighting the floor?
I should add this is for a standard 75RR 48"Lx18"Wx20"H