Design and implementation of a PIR luminaire with zero standby power using a photovoltaic array

This project further reduce the standby power consumption of a PIR luminaire. Generally, although a PIR luminaire will turn on when motion is detected and turn off when any motion is no longer present, it still consumes 1 to 3 W of power when the lamp is off. In this design the luminaire consumes 1 mW when the light is turned off. The power consumption is much lower than that in present products, and the zero standby power luminaire is not only easy to set up but also inexpensive. A more effective circuit design is used to reduce the power consumption which does not affect original functions. Furthermore, the photovoltaic array is included in this design to reduce the consumption from the local electric power company. The standby power consumption of the luminaire is 1 mW in a darkroom and less than 1 mW in a non-darkroom. When the illumination intensity is higher than 150 lx, the consumption from the local electric power company is 0 W.