This Daylight Sensor can read and measure the surrounding light and convert the amount of light to 1-10V electronic signal output. An integrated metre allows for end users to set the brightness level so that the daylight sensor can read measure the available natural daylight against the target value and calculate how much light is required. This demand is then converted to 1-10V signal to be sent to the 1-10V dimmable ballast or LED driver which will then adjust the light output relative to the available ambient light. Approximate 50000 hour lifespan.