If the alternative of Metal Halide comes to mind I have a like new 250w set up Ill let go for cheap.
I think 2 x 250 watt metal halides would work great over a 90...if you choose to go that way.
Would I need t5's to go with them?
After doing some reading on halides I don't think I can use them in my canopy. How limited would I be on corals/clams with the tek or nova lights?