Hi,
I can’t find documentation regarding reading the ambient light sensor values.
The idea is to save battery life with AOD on amoled devices(with a light sensor) by shutting down the pixels if fully dark(ie under jackets sleeve).
Also, it may be used to draw less bright watch face when it’s darker to lower the brightness(and save some battery). Especially helpful when the 3 minutes pixel on time limit will be relaxed.