The light sensor in your device is continually monitored and when the detection level is crossed, the counter is increased by one. Can be used to count each time a light source shines on the sensor. Or alternatively, shine a light on the sensor and count each time the light beam is broken. • Illuminance values in lux (lumens per square meter) or foot-candles. • Detect on rising or falling past the detection level. • Reduce double counts with optional no-count wait after detection. •