Looks very well thought out. I put in flourecent lights in mine and will never do that again. That was before all the LED options came out.
Welder and Air Compressor are on their own breakers.
Lots of outdoor lighting. It's amazing how quickly it gets dark in winter and how there is never enough light out there when you need it.
I have an outdoor line for my air compressor that gets used more then the indoor line
I only have one outside water spicket. Two would be better.
A sink is invaluable. Even if it's only cold water, it's a must have!!!!
I have two work benches. A metal one close to my roll up door that I do all my welding on. I actually do most of everything on that bench. It's ten feet long. Then I have a low spot for my chop saw so wood that I'm cutting sit level on the work benches. Then I have a wood work bench on the right of the chop saw that is farther inside my shop. This allows me to cut just about any length of material on the chop saw easily.
All my shelves are open. No doors. You can see what's up there at a glance. I also store stuff in five gallon buckets, and I mark on the bucket whats in there in black marker. Same with my tool boxes, they are all marked so you can see which one is what at a glance.
This has worked out very well for me, and when I build my barn, this is what I will do in there too.