Thank you for the input.
I have used Evergrow IT2040 (Chinese) fixtures, which produced the same beautiful colors as Phoenix 14K lamps during a side by side comparison on my 180. The lights grew corals very well, but after five years they lost the punch. So, I replaced them with Kessil 360X lights. Unfortunately, Kessil 360X is somewhat underpowered and the pink corals are not as bright as they were under Evergrow. I am adding another Kessil lamp to see if I can get the pink corals look as pretty as under Evergrow.