The WWP-TAP17C is a wireless, battery-free task ambient photo sensor. The sensor uses EnOcean wireless technology and requires very little power to operate, allowing ambient energy sources to power the sensor eliminating the maintenance burden of replacing batteries and disposing of them. The Photo Sensor is hidden behind a unique opaque lens that monitors the interior light level and transmits the value to it's associated relay controller. The controller determines whether to turn it's associated relay ON or OFF.