LED Motion Security Light Doesn't Work in Cold

Originally Posted by DexterII

Fogging can be a problem, but I doubt that's the case here because that will typically cause them to stay on, not off. Possible that they are on a 3-way switch, and the other switch got flipped at some point, making this one work just the opposite of what it used to? I know that you said that they come on when you flip the switch off then back on, but just something to confirm. I assume that there are adjustments that you can make on the light itself, i.e. "always on", "on for 2 hours", "4 hours", etc? If so, one more thing that I would try would be to swich the power off to that circuit, switch the adjustments back and forth a few times, then flip the breaker back on, and see if that eliminates the problem. Those are pretty small switches, most likely made in a sweat shop overseas, and sometimes it doesn't take much for a little corrosion to set in.