Man, i don't know about all that, but my SPS looks awesome under the LEDs. In fact my Stuber has a deep rich color under the LEDs that it never had under the MH.

And the zoas seem to pop as well. Armor of God zoas always looked rather bleh to me, but now after several months of being under the LED, they are beginning to glow. And Dan's tank where he's got them under LED they are sick looking.

One thing I've noticed, and it doesn't bother me, is that growth is somewhat milder under the LEDs. Not sure if it's because I've got the white at 70-75% for only a few hours a day, but less growth means less cutting and fragging, so I'm good with that.