The T5's are for suppliment, and I am running two 48" high outputs. One of the bulbs is a Actinic and the other is 460nm. They are run by a hamilton electronic ballast and waterproof endcaps. I also use two 36" regular output T12 that power Corallife actinic bulbs which really pop out the greens. I use a Iwaki 100mdx for flow which is sent through an oceanmotions 4way that helps stir sediment. I have four returns for the close loop (one in each corner to maximize flow dispersal). I love how the oceanmotions simulates tidal activity so closely, you can really see the shift in flow and how the fish respond.