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1. See if your electric utility meter is close by, "smart" meters make harmonics and hash within a few feet. A demand control may be time of day based, which would explain your symptoms.
2. Try looking at any outdoor light fixture nearby that comes on automatically at night.
Streetlights could be the source as controls regulating line voltages are placed in convenient, shrinking and increasingly weather-exposed packages. I have found few residential controls that last more than a few years but most DO go very erratic and noisy before a final failure to light again.
DC to LED's gets dicey once those cheap materials get wet. Try to pinpoint when the "sundown" point occurs, so you can scout around outside and see what went on.
The circuits that used larger cadmium sulfide photocells didn't have more than a simple triac to latch them on. Those older type photocells that dont "close" right away can make mercury lights noisy and flicker like something diabolically employed in a David Lynch movie.
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"When resistors increase in value, they're worthless"
-Dave G
Last edited by DavGoodlin; 04-21-2023 at 12:50 PM.
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