I have two 150 over a 40 cube. They seem to work ok, but I don't like that they aren't dimmable. I am running a 10k and a 15k. After adding the 15k the coralline took off. Growth seems ok.
Yes the 360 is far better light. I still think the rapid led or the diy led are better choice. You can change the spectrum or add light easily and doesn't cost as much. I love my rapid led over my kessil
I had 2 kessill a350's and went to reef radiance dm 155e's instead and got much higher par values and more growth in general. I did love the look of the kessills though.