Types of T5 lighting intensity

[YellowFinsReef]

So, I've been asking around and doing a bit of research on the various intensity of light intensity for coral growth. I've seen 10K, 12K, 14K, & 20K for the white light. What are the differences between each level of intensity? Does one grow corals better than the other? Currently, I plan to create a biotope with various macroalgae with some softies, lps, and sps corals.

 

[saltyfilmfolks]

Most all of them are pretty close in par out put.