In your case of wanting to use these lights for deterring predators, I would point these lights along the outside low to the ground where you think they might be digging, climbing up to a window or on the roof, etc...predators are vulnerable themselves at ground level where they already are. I keep white solar lights all around my coop and run. They are at ground level and I point them right at the coop about a foot up along the sides. I have found this is enough to keep the coyotes, cougars, coons, skunks, etc... from prowling. Nothing likes to be seen at night, including the predators. However I don't allow these lights to shine into any windows to disturb the sleeping birds. Some of my solar lights have been burning for 7 years now and other than a battery change around the 5th year, I have never done any maintenance to these things.