I had 2 AI sol blues over my 75 at one time replacing my MH and t5's. After 6 months I switched back to my MH/t5 and never looked back.
This past year I purchased some d120 full spectrums and had 3 over my 150. At first everything looked great! especially with all blues. I acclimated my sps kept my softies in their locations and enjoyed what I saw but still wasn't 100% happy. After a few months I went back to my 12 bulb t5 fixture and added some panoramas for accenting my corals. I am now 100% happy with my light setup.
Reason why I switched back:
1. The water didn't look crisp. Under t5's the water had a cool blue ice look. Under the leds the water looked thick, dense, as if fishes and coral were swimming in a tub of blue jello...
2. My corals didn't do to well with the new light. I know I probably needed more time but I experimented with led grown sps and now switching back to t5s, I had no idea some of my sps had different colors or changed colors entirely.
I'm not doubting led's as I use my AI's over my softie frag tank. Unfortunately, I have yet to use or see a led unit that can give me the same colors as t5's.