On Sep 28, 7:59*am, stryped wrote:
I planned to use a motion detector with the two flood lights centered
above my garage door. I started cutting thinking I would put a plastic
box behind the metal siding inside the garage. However, being centered
it is over a raised rib where two panels meet and it looks like I made
a mess. It was hard to cut and I just stopped. Any ideas on how to
properly mount this light and make it look ok and not leak?

I'd use a thin octagon / round box on the outside, that way only 2
small screw holes needed + the one for the wire, and it would at least
look as good as what you are proposing.