Wow, that's a lot of lights! I know the look you are talking about in the rows and I do really think it looks classy. If I went with lumitec or recessed lights I would have wanted 6 or 8 in my living room area for that effect. The 3 led lights I decided upon are supposedly pretty bright so I opted to go just for the four. That also cuts down the number of holes.
Finally, a 2x2 configuration works sell for spacing as one light will be in each void between ribs and over the corresponding window in my trailer. Spacing out 3 on each side would have meant optimal spacing would have out the middle one directly on a rib. I'm sure I could have fudged the spacing to work it out but I get really weird about that kind of geometry. Four on each side would space out nicely in my configuration, however.
Texas Gulf Coast Unit, Texas Airstream Harbor
Angelina National Forest, Zavalla, TX