Ambient light sensor
ALS
How bright a space is, measured the way the eye sees it.
Measures the overall brightness of a space with a sensitivity close to the human eye. It shows when artificial light is on although daylight would be enough and helps adjust lighting to the time of day and the weather, indoors and outdoors.
- Measures
- Brightness in lux
- Typical use
- Offices, corridors, stores, car parks



