ive been in the hobby 30 years wirh fresh water and had a marine tank 8 yrs ago then a family tragedy had me out of the hobby for 2yrs and never returned to salt. Freshwater is one thing but marine is a whole new animal and as with my freshwater I want to do it right the first time
Np - just letting you know lighting is one of those things that you will get a zillion different answers. The Kessil a series gives you mounting options due to the lens feature. Dense array vs panel is going to provide a different spread but compensated by mounting height with the kessils.
As I mentioned you may want to do a quick scan of the ReefFi 2.0 panel. Cheaper and more light with many hobbyist standing behind it. Me personally I prefer to not add supplemental bars as that means I'm doing something wrong right out of the gate with the design. Also less maintenance, cords, and power supplies.