Guys, will you please help me to seek the purpose and application of a night switch sensor? Eventhough you can't give the complete information, just help me as long as you can. I will appreciate all of your replies/help here. Thanks a lot, GOD BLESS. 
PS: like Gorgon said, a night switch is an electronic switch that turn the light on when it gets dark(night).
It turn the light on when it gets dark because of the sensor, that's why we called it night switch.
PS: like Gorgon said, a night switch is an electronic switch that turn the light on when it gets dark(night).
It turn the light on when it gets dark because of the sensor, that's why we called it night switch.
