What can cause your dusk to dawn light to go off and on?

A dusk-to-dawn light may turn off and on due to several factors, including a faulty photocell sensor that fails to detect ambient light correctly. Other potential causes include electrical issues, such as loose connections or fluctuations in voltage, and environmental factors like obstructions that block light from reaching the sensor. Additionally, if the bulb is nearing the end of its life, it may flicker or fail intermittently. Regular maintenance and inspection can help identify and resolve these issues.