Zadjustable irradiance prototype of smart street lighting system by using simple optical components

In this study, an adjustable irradiance prototype of street lighting system with several optical components and simple control circuit interface are demonstrated. By using several photoresistor sensors and data acquisition (DAQ) card, the control center of system can adjust suitable irradiance of street lamps automatically. The system will respectively supply 50% or 100% of irradiance of the street lamps depending on its detection of the insufficient environment light or sensing vehicles and pedestrians. Therefore, this street lighting system can provide sufficient irradiance to vehicles and pedestrians whenever needed. As a result, when we use LEDs street lamps and smart street lighting system simultaneously, both of the electric energy wasted by traditional street lamps and cost could be saved as well.