Does the shop have house water, gas and electric lines routed through the joists?

Ease of access is important, when something needs service.
I just tacked up reflective foil intended for attic insulation (I had leftover material.)

It's not neat, but it keeps light down where I'm working and has cut down
on spiderwebs - too slick for them to attach, I suppose.

It required a stapler and scissors.

http://www.ecofoil.com/All-Products/...125-500-sq-ft-