There is an Ambient Light Sensor with Microsoft Band, and some apps in the Windows Store show the ALS value in Lux, But I can\'t find a way in the Band SDK to read the ALS Lux v
The ALS is not currently exposed by the Public SDK for 3rd party apps. You can add a feature request for access to this sensor in a future version of the SDK at: http://microsofthealth.uservoice.com/