Beautiful tank

I have a question though,,, I am no lighting expert,,, so most reefers,,, myself included,,, would buy all four puck LED light units,, space them out over the tank,,, that's not what you did,,, back row looks like four puck, 2 puck, four and two then another two ,,, front row,,, just a couple of two pucks,,, I can understand the front row,, maybe just didn't want as much light at the front of the tank,,, the back row though,,, thats what gets me,,, its not like you have a big gap in there,,, could have just run 4 puck units all the way across,,,, so there has to be a reason
So educate us,,, why this set up?