I got rid of my radions gen 2 and went with the 8 bulb 60inch ATI unit....SO glad I made the switch!!! Most coral were fine with the change, but a few acro started to bleach some, so I just cut down the photoperiod a bunch....I run 5 blue+, 1 actinic, 1 coral + and 1 aquablue special....I bought 2 Blue stunner strips for the front and back and does great for dusk/dawn type look!
What max percent were you running radions at?
And how long is your current photo period with the t5?

