The room is 11' 6" x 19'. I can set my 5" cans either 25.5" or 37" off the long wall(this due to framing). Which distance should I go for? I am thinking maybe 4 cans in 2 rows along the long walls, at one of the 2 distances off the wall specified. If I think I need more light I will add 3 cans down the center of the room, offset from the rows of 4. Comments are appreciated!