OK, so.... lots of pics to follow. First up, the front half of the garage showing two surface-mount 4' fixtures and two shop lights:
In these pics you can see my electrical sub-panel and electric garage heater, my parts storage rack and tools, as well as the 4' fixtures:
Now the front half of the garage:
None of the lights or outlets run through the ceiling conduit are fully hard-wired. They all converge into a double-gang box where they plug into the outlet above the garage door opener:
These shots show views of the garage, but this time with the center lights turned off via a switch in the middle of the ceiling:
Ultimately, I'm going to build an armature that turns off the center lights automatically when the garage door is opened, and flips them back on when it closes. That's why the switch was placed close to the center track of the door opener:
Finally, a few shots with a car parked in the garage so you get some idea how well lit everything is for detailing purposes:
Just a thought, but if you have or can find someone who has old light fixtures for 4' T12 lamps and is looking to get rid of them, you can retrofit them for use with T8s for about half the cost of a new 4' fixture. I found that I'd have paid about $30 for a new fixture, but buying the ballasts only and retrofitting them into some old fixtures it cost me $15 per fixture.
I'll grant that you have to be somewhat comfortable doing electrical work to put a setup like this together (and I've done a ton of wiring over the last few years), but really it's not that difficult. You just have to use common sense and be thorough about your connections being secured with quality wire nuts and electrical tape.