[arcticdude]

I also used the 4' T5's, sourced from Home Depot. I only used the 2 bulb fixtures, but still put up 20 in the 2400 sqft. I thought about multiple circuits, as I had done that in the previous building. I found I typically either needed only a little light or all the light and very little inbetween. So I just have 4 on one circuit and the other 16 on another. So far it's doing well. I don't think you can ever have too much light in a building.