losing color with good parameters?

I am losing color from almost all of my corals...I just replaced my bulbs and I have solid parameters from temp, sal, phos, nitra, niri, amon, calc, alk, mag...I don't get it...anyone?
 
please list
1.your corals that are loosing color
2. what type of lighting (MH, VHO)
3. bulbs are you using (kelvins)
4. lighting times each day
 
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