The light flickers or turns on and off at night, what do I do?

There could be a couple reasons why the light flickers or cycles on and off:

1. Light is reflecting back onto the sensor - Light from the fixture reflecting off a nearby wall, window or other surface, or light from another fixture, can make the sensor turn the light off. Make sure the sensor is not facing a reflective surface or another light source.
2. The fixture is connected to a dimmer switch - Replace the dimmer with a standard on/off switch.
3. A bulb is loose - Turn off power, let the bulbs cool and check that each bulb is seated securely.
4. Loose wire connection - Turn off power at the circuit breaker and check that all wire connections are secure. Contact a professional electrician if you're unsure.