I replaced my 8' fluorescents with LEDs about four years ago and they are fantastic! Especially good for instant startup in my cold Maine garage. When I expanded my garage last year I bought more lights from the same company, made in USA and excellent quality.
https://www.hyperikon.com/led/
I used this site's tool to determine lighting requirements:
http://www.visual-3d.com/tools/interior/default.aspx