Light sensor

Senses the ambient light intensity. These sensors can be found in various forms including photodiodes, photoresistors, and phototransistors. They convert local changes in light conditions into corresponding changes in voltage, current, or resistance. Commonly used in robotics, home automation systems, security systems, and outdoor lighting control systems. One common use case is automatic adjustment of indoor lights based on the amount of natural sunlight entering a room during daytime hours. Another example is camera exposure optimization, wherein they allow the camera to capture better images by optimizing exposure.

References:

https://www.analog.com/en/design-center/glossary/light-sensor.html

https://www.digikey.com/en/articles/light-sensors-an-overview