Swear you been around longer than me.
Testing people?
I have always kept my lighting from 14k to 20k spectrum. I haven't really looked into the overall spectrum works best for SPS specifically for coloring. I would think they all grow but people who can help better about SPS coloring up and how lighting spectrum can really affect SPS growth and color. I think people like Vio and forget the other guy on here with a SICK SPS tank. I am sure there are others but to me those two have stood out and I know Vio changed with different lighting.
There was the guy who did some sick SPS on the secluded little island near JFK. I haven't seen him post in awhile and remember seeing a f/s thread on his tank but he had a few.
Sorry can't help with this question.
However, how is the coloring under a more blueish spectrum?