Ray wrote:

I planning on installing a light at each corner of a metal building in my
backyard. I would like the lights to come on at dusk and turn off at
daylight.


Why? So the theives won't trip over the watch dog and sue you? Security
lights offer little security and only serve to point out a spot where
something valuable is kept. Unless you're up all night watching, you'll
never see an intruder.
Besides, lights at night can bother the neighbors. Maybe you live isolated
and that's not a problem, but the light may shine in your bedroom window as
well. That could be good as it would keep you up so you can watch for the
invaders. If you must, use motion sensor lights that don't shine all night.
Please research and think about what you are about to do.
My 2¢ worth.

Steve
southiowa