If your thinking about getting new lighting in your shop, look no further than fluorescent lighting. Why use fluorescent? That is easy, its cost effective to install, and efficient to operate.
I have seen it done a few ways. I feel the direction that I took gave me the most light for my dollar. My shop is a 36 x 54. Its all open space, and the ceiling is 10ft 6inch tall.
I put 4 rows of these light on 9ft centers. The first row started 4ft 6inchs from the wall. There are 5 lights on each of these runs which gives me 20 fixtures in all (well plus 2 directly over the bench). So 22 fixtures in all. I paid $9.99 a fixture minus 11%. The store had an 11% discount at the time. A 10 pack of 40 watt bulbs is around $30. This will tack another $6 onto each fixture.
Bulbs $6 40watt T12
If we take this by the number of fixtures we need (22) this comes to $352. If you want your shop lit up, this is the most economical way to go. I seen one guy spend $89 bucks on a fixture that held 6 of the same bulbs I use. His shop had a slightly smaller footprint and he needed 8 of those fixtures. If he wanted to run 24 2bulb fixtures like the ones I ran, he could have gotten away with a $400 setup, compared to an $800 setup.
The other reason I went this direction was maintenance. If a ballast goes bad in one of these fixtures, I will not replace the ballast, I will just throw the bad fixture away and buy a new one. $9.99 is far cheaper than a new ballast. Its a fact that if a burned out bulb is replace immediately after they burn out, the ballast will last longer. Burned out fluorescent bulbs are the highest cause of ballast deaths in the United States.