What we need here is someone with an established SPS tank who ran MH or T5s and had amazing colors to start with, then switch to LED and had the same result or even better with LED as far as growth and coloration is considered.
I know most are newer to SPS, including myself, and went straight to LED or quickly went to LED so haven't really seen first hand stable coloration from other technologies over their tank besides LED.
Closest comparison I have is the showtank at aquatek. I thought it was stunning when they ran just MH but when they switched to LED, I was far less impressed. I don't know if they had other spectrums like the reds, UV, and green in their LEDs but I did not like the look of the tank after they switched.
I would have liked to have seen Tim's tank (wizard) with LEDs over it (longterm... not just really quick). He had amazing coloration and he used a combo of 400 watt MH and T5.
Didn't someone like Don Duncan or someone else who had a great SPS collection switch from MH to LED within the last year? Wonder how their tank looks now. I just remember someone had their tank half lit with LED s and the other half with MHs for a brief transition period before fully going LED.
-Ty