I run SPS AB+ on my tank. I have 2 AI Hydra 52 HD+ and 1 Kessil A360 Tuna Blue in the middle. On my Kessil, I run my color channel at 62 for SPS AB+
How I came to it originally may not be logically sound, but I have since found supporting information that I may have the right number anyway. Originally I went on the assumption that 0-50 were the blues, and 51-100 were the red green and white. Since SPS AB+ is defined as 100% on the blues and 24% on red green white, I used 50 for the 100% blues and 12 for the 24% red green white for a total of 62.
Since then I questioned how I came to my number and did some more research. Ideally what I was looking for was a table from Kessil that showed color value and color temp. I could not find that. Kessil should really publish something like that.
I reread the document where SPS AB+ is defined
here and while there is no color temperature mentioned on the SPS AB+ page, the next page that defines SPS PHX14 (which is very close in definition to SPS AB+) says it is modeled after a 14k bulb.
I came across another thread
here where 1) many members reported testing and getting the most PAR at 60 and 2) one member got a response from Kessil stating “In regards to the color, the tuna blue ranges from 20,000 k to 10,000 k. The lower the color %, the bluer the light and higher color % is the white spectrum. 14,000 k is around 60-70%. Please let us know if you have questions. ”
did he just say "14,000 k is around 60-70%"?!?!?
I'm sticking with my 62
Once you have color, max intensity should be set based on the height of your fixture.