Garmaine Staff asked 2 years ago

We have been working on running electric to our outdoor shed recently, and are wondering what is the preferred way of attaching the romex along the vaulted/pitched ceiling for the lights.

The light boxes are about 5 feet apart from one another, and have 2 or so joists running in between them. From what I've read, we shouldn't drill holes, so would you just staple the romex to the underside of the joists? Or possibly run conduit between them and attach the conduit to the underside of the joists?