I am sure I will have more questions as I go along

The lighting ended up having a lot of constraints—I abandoned the recessed/can lighting idea because any penetrations to the drywall are supposed to somehow maintain the fire rating of the garage envelope because the garage roof structure connects to that of the main house (or if there is living space above the garage) which meant I would have been spending probably $2k just in parts. The existing fluorescent fixtures come down like 4" and, if I get a lift, that loss in headroom might be the difference between me being able to stand up under the car vs. not, so that strategy wasn't acceptable.
After going surfing a bunch of forums looking for ideas I ordered 30 surface mount 4', 5000K, T8 LED tubes with the connectors that let you butt them right up against the next fixture. I didn't realize they had ones you could butt up against each other like that until I saw the picture below. I think I am going to try out this guys rectangular strategy since I can use surface mount fixtures without losing any headroom in the area of concern AND I can avoid having wires strung across the ceiling (which is aesthetically unacceptable to me) without having to get into the ceiling to run more wiring. Not that I wouldn't get into the ceiling and wire up whatever if I had to but going that route would exponentially increase the duration of the project.
The guy below used 8' tubes, making a 8' x 16' rectangle. I got 4' because I don't think 8'x16' is the right size rectangle for me. Our cars are all about 15½' long so I decided to try 8'x20' to keep the ends of the cars out of the shadows, which was always a huge problem in my old legally temporary building. It was 22ft long and I had no lights (and no way to mount lights) within about 4' of the ends. If I find shortcomings in the setup, I will probably optimize one bay for detailing and the other for mechanical work. The setup in the old LTB did have 5 transverse lights over the middle of the car which was awesome for working on the hood and roof which is obviously missing here. I am also concerned that I may not get as much light as I want into engine bays for mechanical work. Current ideas to resolve this include a removable hanging fixture to bring light down a few feet from the ceiling or track lighting since vertical space over the hood is not at a particular premium with a lift and it would be much easier to install and more configurable than cans. We'll see how it develops.
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