This app logs the ambient brightness as detected by the appliance's brightness sensor. Does the light in the refrigerator really go out and stay off? When is a lamp with a motion sensor activated and for how long? Does it really get dark in the walk-in wardrobe when the door is closed? And does the UV steriliser work as described in the operating instructions?
The function of this app depends on the built-in brightness sensor of the appliance. When used with a UV light source, it depends on the UV light source and the brightness sensor whether the app provides helpful information at all. In small rooms, the display of the unit can influence the result of the brightness measurement.