Do you need new photocell if light keeps going off and on at night?

Yes, if your outdoor light is cycling on and off frequently at night, it may indicate a malfunctioning photocell. Photocells can wear out or become sensitive to ambient light changes, causing erratic behavior. Replacing the photocell is a good way to resolve the issue and ensure consistent lighting. However, also check for other issues like wiring problems or faulty bulbs before replacing it.