I have found that battery powered lights, at least the ones I have bought, are not reliable, if left out and exposed to single digit temps. In the pic I posted, the windows are shut. In the warmer months, the side windows slide open, and the upper windows are hinged at the top, and open out. The wire front, is ALWAYS open. I'll get to that light and switch someday. But right now, I'm like the one-legged man, at a butt kicking contest.
Hey JackE I have five of these led solar operated lights. They go on by motion and stay on up to 2 minutes or as long as you keep moving. lol I love them and if you get the Harbor freight warranty you are golden.
http://www.harborfreight.com/60-led-solar-security-light-69643.html
The battery lasts over a year so far, they have smaller ones but I like the 60 led one. I have one on the coop to ward off predators.