I was putting up some new lights at my house. The first couple were
wired so that the bare metal ground on the light and in the house wiring
were connected together using a wire nut. There were also a couple where
these two wires were connected to a screw on the mounting bracket. I
went ahead and just wirenutted the two together as above. Now I get to
thinking any particularly important reason I shouldn't do that and use
the screw on the mounting instead?