he right amount of light. Unison Echo™ Light Sensors help you cut down on wasted energy. When a space is lit by natural light coming in through windows or skylights, it doesn't make sense to have the electric lighting running at full. Light Sensors are able to detect and measure the amount of natural light in an area, and raise or lower the output of lighting fixtures accordingly, to maintain a consistent lighting level. Echo light sensors can manage up to two zones independently, so you need fewer sensors for multi-zone spaces.
Unison Echo Light Sensors Datasheet