Second cup not kick in yet ?
I don't want to get into the #14 Vs #12.
I thought you already answered this?
Why aren't you running your lights in series?
Ok, give them a branch circuit box beside your light and give future electricians something to talk about!
I took a look out on the Wild Web and can only summarize one way that volume for area fill calculations is determined by using water displacement testing. In this case it would be pre-punch Area or sheet metal - Volume displacement.
Frankly, I was thinking the inside dimension minus all the area of the coins indented into the space and the 8 round corners (punched 4sq) added up to the smaller area calculation of a four sq box, as mentioned ealier.