I'm finishing up a 30 x 40 with an 11' ceiling. I have four banks of three T5 two-tube units with some additional zone lighting in an area where I do some sign work. For the most part I'm happy with them although I rarely have the entire shop fully lit.
You'll find the older you get the more light you need!!!! [img]<<GRAEMLIN_URL>>/crazy.gif[/img]
Lots of good info
here.