As for par, I don't know because I have no meter to check this. Never had in the past either. My lights are mounted 13" above the top of my tank which is 24" deep. I had the 16,000k running with two AI SOL blues side by side for about three weeks now and have replaced the AI's last week with the 10,000k Razor. The side my 16,000k has been running on my corals all seem to be doing great. The other side with the 10,000k looks OK also after a week of running. I am not home right now (currently offshore) but if memory serves me correctly, the 16000k is running at 80% on one channel and 50% on the other. My 10000k is running 80% on one channel and 35% on the other. The higher % channels being the more blue channel. I will get some pictures posted when I get in next week Wednesday. That's about all I can offer now other than there is a color difference from the AI & the Razor. Also I have a mixed reef, some SPS, LPS and Softies.