Alternatively, one can use a thermal sensor, like I did in this project [1], where the light is turned on when somebody is standing still in front of the mirror

Alternatively, one can use a thermal sensor, like I did in this project [1], where the light is turned on when somebody is standing still in front of the mirror [1] https://github.com/iver56/auto-light https://github.com/iver56/auto-light