Most motion sensor lights can be reset by simply turning off the power source—at either the wall switch or the circuit breaker—for 30 to 60 seconds. This “power cycle” clears the sensor’s internal memory and restores the device to its default automatic settings. Whether you installed your lights to deter…

Motion sensors work by monitoring a specific environment for changes in energy, heat, or waves. When a person or object enters the sensor’s “field of view,” the device detects a disruption—such as a shift in infrared radiation or a change in wave reflection—and sends a signal to a processor to…