I have redone about half my shop with LED lighting so far. My approach is to move displaced florence fixtures to other less critical areas that either have bad lights or need more lights. Then replaced with these two style of LED lights singles where I didn't need as much light and doubles over work areas. They plug into each other end to end so whole sections can be fed with one set of wires.
https://www.lowes.com/pd/Utilitech-Pro-Strip-Shop-Light-Common-4-ft-Actual-1-61-in-x-48-03-in/1000007666https://www.lowes.com/pd/Utilitech-Pro-Strip-Shop-Light-Common-4-ft-Actual-3-23-in-x-48-03-in/50352822I love them. I have to hold myself back from replacing all of them now.