Light level detection

Measures the level of ambient light in your bedroom using the ambient light sensor (lux sensor)

Settings → Sleep tracking → Awake detection → Light

You will see light level plotted on your sleep graph (in the same way as heart rates or breath is plotted), in LUX units.

The #dark tag is added when you have less than 30 lux for at least 90% of the night.
The #light tag is added when you have more than 60 lux for at least 33% of the night.

If there is disturbing light (see the table below for details) after sunset, we consider it as an Awake period.