What is Motion Lightening in Samsung H Series TV?

In your Samsung TV, when Motion Lightenting feature is set to On, the TV automatically adjusts the brightness of the screen in response to the brightness of the room. That works in below mentioned ways :
 
● In Bright room light : The screen brightens. 
● In Dim room light : The screen dims. 

Below mentioned are few conditions to be taken care of while using Motion Lightening in Samsung TV as follows :
 
● Only available in Standard mode.
● This feature is not supported in 3D mode.
● When you change the Backlight / Cell Light, Contrast, or Brightness, the TV sets Motion Lighting to Off.