These are Blue Moon Aquatics P30s. I am running 6 of them on a 5' tank. I got these about a year ago.
I think I could have gotten away with using only four units, I didn't know they would be so intense.
The growth is the same as when I had my halides. I just fraged a green slimmer Acropora and in two weeks It had buds all over where the frags were removed.
I got these lights because of their simplicity, no dimmers or controllers, they work on timers just like the old days. :nerd:
I also liked how the optics cast light almost like my halides and have minimal shadowing.
I prefer On-Off over dimming up and down because corals receive the most amount of light from start to finish throughout the day.