Late 80's construction, porch and yard light turn themselves off after roughly 30 minutes. There is no photo cell to control when they turn on or off, only switches in the house. Both the yard and porch light get power from the same source, but are on separate switches (other lights that get power from the same source function properly).
I have replaced the switch for the yard light, but it still happens. Another curious thing that happens is if you turn the lights on, off, then back on again the light flashed 3 times. This is for both the porch and yard light.
I have replaced the switch for the yard light, but it still happens. Another curious thing that happens is if you turn the lights on, off, then back on again the light flashed 3 times. This is for both the porch and yard light.

