The fact that your first row of lights is where the air hits first makes it so more air goes to the first row, then the second row. You want to have equal amounts of air flowing through both rows. So what I said before, was a solution to your problem.
I am referencing your 2nd schematic.
I don't quite understand
I am referencing your 2nd schematic.
Do you think I should make the furthest right port on the manifold have a 10 to 8" reducer from the manifold so it will pull more air?
I don't quite understand