I answered Kris's PM but will put here for others as well.
Hi Kris. I have the 160's on a 240 tank. I'm running 90 blue and 40 white. Prob. close to 20K. I have LPS and SPS so needed the higher light. Plus I like a bit more white look to my tank. You can check out their library. I had planned to go 100 blue and 50 white but everything is happy and doing well, so leaving it as is. For now anyway! Hope this helps. It pretty much is a trial and error to see what you like and what your tank likes.