The Kessil 150 with the 10k is a white color temperature some say yellow I do not see that I have a 10k Kessil, I placed on one my 120 tank for four hours and caused one of my yuma's to move and it left a baby, so I would put screen material over the tank and remove one layer a week.
I am not sure if you can change your mind of the 10 k or not or if they have not shipped you might like the 15k better more blue. Marine Depot had a really comparison showing the different models. They are a sponsor here.
From what little i have read the PAR readings are a fair amount better with the 10,000ks I have plenty of supplemental actinic lighting already on the tank. Worse case scenario ill buy two of the 15ks or 20ks and add them in later for a total of 4.
Im lucky enough right now that i dont need to worry about the dimmible/color options at the moment as i have 6 settings of light intensity/color spectrums hat i can control/bring on line gradually with my additional supplemental lights that are already on the tank.
Also not concerned with the my tank being 60 inches. There is noting on the outer 8 inches of each side of the tank as its basically just extra swimming room for the fish...plus i do have that T5 system sitting in the middle. I read some where that mixing T5s with LEDs is actually a good thing (for some sort of light spectrum reasons that were over my head). I have the wonky center brace on my tank to contend with also which left me thinking i might be better off with those 18 inch x6 T5ho bulbs over the center rather than having to shoe horn a spot light style LED to one side or the other (of the center brace).
...actually, adding two additional A150s in either 15 or 20k might make a nice upgrade path. It would increase the total PAR and give me yet another phase of intensity in the light schedule.
I should add that im a total newb and have only kept leathers, zoa's, gsp and a maze coral (that doesnt look great right now). I really know almost nothing about lps/sps corals (or corals in general) but im hoping to expand "a little" with these lights.
Ill be happy if i can keep just a few of the more demanding corals in the upper 12-16 inches of the tank, ive no need for sps on the sand bed. I would like to keep a clam one day on the sand bed along with my maze coral....
Am i way off base or on track with my thinking?