After buying the shop from the widow of a woodturner/friend/neighbor, I was running some additional circuit wiring thru the attic and found lots of shards of shattered PVC pipe on top of the insulation layer. One piece even penetrated the steel pole barn siding. Must've been one hell of a bang. I wish he was still around to ask him if he was there when it let go.
I used 3/4 and 1/2" sweat-fit copper water piping for my compressor at home. I ran a couple drops in my basement workshop, and one out to my garage. I had planned something similar in my barn shop, but so far, I've just run a 50' rubber hose alongside my dust collection piping to near the lathe.
I have 8' ceiling in my shop space, but instead of hanging a shop light over the lathe, I build a large plywood box/shelf for over the lathe. It has LED tubes on the underside, and a generous shelf for chucks, paper towels, stereo receiver, etc. It also gives a "wall" space at each end for hanging tools and a track on the back for dust collection hose drop. It's not pretty, but effective.