My main shop is 16’ X 32’ with 11’ walls.
The top 3’ around most of it is transom windows.
The front has double doors with a single door on the back wall which aligns with one of the front doors.
On a clear day, it’s plenty of light for milling, ripping and cross cutting.
There are 6 double-tube 8’ LEDs (5500’s) on 4 individual switches: one switch for each set closest to the wall and one switch for the next pair. This allows me to light any specific area of the shop or all of it as needed.
They were originally 12T fluorescent lights but I converted them to LED using tubes from Greenlightdepot.com
I procrastinated on the conversion but it was really easy. The hardest part was moving the ladder around.