I mounted a mercury vapor security light with a photo senser to the from of my home. The light has a dusk to dawn sensor.
I ran a electrical leg to the light from a recepticle that had one side open. The recepticle is always hot.
In front of my home about 50 yards is a city street light that gives my home some light regardless.
I installed the light per instructions. Put the sensor facing opposite the streetlight.
Did a test and it worked fine.....BUT
during the night, the light will go off and on automatically. Very strange. The recepticle that I tied into does not supply anything that is eating amps or volts, and the light just requires a small amount of electricity.
What could be causing the light to go off and on during the night time.
I even took it back for another one thinking that it was defective, but this one does it also.
Cannot find anyone that seems to know what is happening.