I installed a 200-lumen battery-powered dark-and-motion sensor spotlight with a 20 second cycle under the carport on Viv’s driver side. It’s all plastic, so we’ll see how it fare amidst the elements. I note the install date here via this post so that I will have a sense of how long both it and the 3 D-cells it uses last.
EDIT, September 21, 2023: I changed the batteries yesterday. So that’s six and a half years on one set of batteries, not bad.