Okay,,,, I got a good idea about MH, now, what about the T5's also, could a person run an LED strip with this setup and slowly add until had enough to go all LED? How many would it take for a 100g 20' deep and lights 11" off of water. what would be a good combination of T5's ( for growth and color) that would go good with MH. I have 4-80w T5's( 2 outside come on together,then the 2 inside). Right now I have 4 80w (420 actinic)(3 months old), they seem to have a whitish blue color( don't help with the color of the corals). Thanks for the input.