AmbientLightSensor { id: ambientSensor }
LightSensor { id: lightSensor }
Switch {
    property real scaleFactor: {
        if (!ambientSensor.reading) return 1.0;
        return ambientSensor.reading.lightLevel / 5;
    }
    enabled: ambientSensor.active
    checked: ambientSensor.reading &&
        (ambientSensor.reading.lightLevel !==
              AmbientLightReading.Undefined)
    automaticCheck: false
    scale: Math.min(parent.width, parent.height) *
           scaleFactor / Theme.iconSizeSmall
}
Label {
    text: lightSensor.reading ?
        lightSensor.reading.illuminance : " "
    color: Theme.highlightColor
}