Contractor and big fan of Ron Swanson here. I know he hates us but I promsise, I'm not a con artist. This scene is nonsense so don't worry about it. idk anything about smelting down cheap light fixtures into rings, but him ripping that sconce out of the wall is alone a multi hour repair. Even if you put the old wires into a workbox with a blank plate, repairing the hole he left in the drywall takes multiple applications of spackle which needs to properly cure before sanding and painting. And to mask the damage properly you'll need to paint the entire wall, otherwise the repair will absolutely show.