My garage is 30X30X10 with a 4X13 bump out on one corner to handle the garage door. The 13'X34 section will be the pass thru vehicle bay and be lit or controlled separately. The remaining 17x30 will be the shop area and again controlled separately. I'm fixin' to use dual tube 4' LED fixtures, but don't know the spacing I should be looking at. My eyes aren't close to what they once were, so a few more fixtures may be necessary. What would you recommend?