- Number of Sensors
Use separate sensors for each area that has a different response to exterior changes in sunlight. For example ,use separate sensors for spaces that face in different directions, and for spaces that fall into the shadow of adjacent buildings at different times of day.
One sensor can control any number of fixtures, either directly or through a power relay. However, sensors are cheap in comparison with the cost of wiring labor. This makes it more economical to install a sensor in each lighting circuit, rather than extending the wiring to allow a single sensor to control a larger area.