went all LED for a year, rapid cw and rb. Softies, LPS and some SPS did well underLED and looked great. Some acropora like green slimmer, red planet grew very well under the LED. However millepora would not grow much at all, would lay down a good base but not branch upwards.
I did not run "full spectrum" LED
Its been six months since adding two 80w ATI blue plus T5, and just added two more 80w T5 on a std 150g. The Mille are now growing and have gotten more growth in a few months than in a year under LED.
So, NO I was not 100% happy with LED
I am now 100% happy with LED and T5, the LEDS give the shimmer and an extra pop that T5 alone could not produce
My advice would be to keep the T5 and add some blue and royal blue LEDS.