Lux Auto Brightness 1.13 Full APK. Auto brightness works. Lux is not normal application of light. It intelligently adjusts the screen brightness depending on the environment you are in. If, for example, enter a dimly lit room, Lux will automatically lower the brightness of the screen to make it not only fun to read but also to save battery power. Lux provides the ability to automatically adjust the backlight at fixed intervals (periodic mode) when it detects a change in the environment (dynamic mode), or when the phone wakes from sleep. You can also manually adjust the backlight. Simply turn off the automatic mode and can be used as a tool to traditional light!