The Photocell Light Sensor (dusk-to-dawn) is an efficient and reliable device for outdoor lighting. It can be easily installed with its 5 3/8" hole and 3/8" pipe thread. It operates on 120Vac and is compatible with both 50Hz and 60Hz power supplies. The 4" wire length allows for convenient positioning. It has a robust wiring configuration and can handle heavy loads up to 500W or 850VA. It is UL listed for added safety and meets all necessary safety requirements. Overall, it is a user-friendly solution for automatic outdoor lighting control in residential and commercial applications.