I have several exterior flood lights that are controlled by motion detectors and have variously been in place for 6 to 10 years. The manufacturers vary but most are made by RAB Electric Manufacturing. A couple were made by Heath Zenith.
They fail "ON" at temperatures below about 0 F. The absence of operating temperature range in the product information should have been a warning that they weren't proud of their performance but I guess my architect didn't pay attention to it. I would think a New Jersey based company would make an outdoor product that could operate at these temperatures but it's not so.
Does anyone have any experience with motion detectors that function well over the -20F to 100F range?
RB