i have 2 lights in mind one is a 4x65 watt power compact lamp. the other one is a 4x54watt T5 lamp. i dont rly know the diffrence. i dont know anything about the t-5 lamps, or do i just want as many watts as i can get?
So i currently have 2 x 175W MH and 1 250W MH. Would I be okay if I went with a 12x39W T5 with individual reflectors.
Again, opinion...but it depends on the quality of the reflectors and your bulb mix.
I find that the clams I had in my 92 under 8x39T-5 with individual reflectors are much happier under the 2x250MH/2x54w T-5 fixture they live under now.
On the other hand....I have a 40g breeder that xenia is growing out of control under a NO fluorescent AGA fixture
I keep SPS in the upper half of my tank and they're all doing great. Noticable growth. I have SLR Icecap indiv reflectors that are supposed to be some of the best reflectors. I also keep 2 clams that are doing real good.
Also J why wouldn't you get 5-6 80W T5's? The retro kit I have from reefgeek with the SLR's are only 2.5" wide. No clue how wide a 155 is...
Jay, I have the Nova Extreme with just one reflector, and I have been able to keep all of the SPS corals from Aquaman's Instant reef without issue. Sure, the growth may not be extreme or fast, but I have certainly had growth on all the corals and have not lost any of them. And, I have a 46 gal bow front, they are at all depths of the tank. It may not be the best light, but it certainly is working better than I expected.
Just my experience.
-Mark