I am using 4 X 24w T5 for my nano. I have a sump which house a macro skimmer(taiwan made). lights running at 12 hrs. 2 X aquablue + (D&D), 1 D&D actinic pure & 1 aquablue special (ATI). I am running carbon thru filter bag in sump.
I also have a nano for SPS.
Actually, my first ever saltwater tank. It took me 7 months of staring at rocks and sand and learning how to stabilize the water parameters, before I had the guts to buy corals. (Reefer Madness is where I got them, very, very pleased with their service.)
Of course being hard headed I did just the opposite of what I was told and started with SPS. It has been 3 months now since the first corals were introduced. All are healthy and growing(knock on wood).
I love my little box of water, but I can't wait to go bigger.