Outside lights that turn on automatically when the sun goes down and turn off when the sun comes up are one of the modern world’s handy conveniences and a great home security feature. But what if these lights are no longer working properly? What if after replacing the bulb, these lights don’t come on at night? Or what if they never turn off? It may be time to replace the photo sensor switch.
About Photo Sensor Switches
Some outside lights are equipped with this automatic switch so you don’t have to remember to turn the lights on at night and turn them off in the day. This photo sensor switch is activated on and off by sensing light level around it. At night, in low light levels, the switch is activated and the lights comes on. When the sun comes up, high light levels deactivate the switch and turn the lights off. Simple. Pictured are a couple of examples of photo sensors. One stayed on all the time (possibly because the plastic over the sensor had gotten old and discolored), the other no longer turned on (not to built to last forever). How do you know the sensor is the problem?