Determines the level of the backlight intensity. You can adjust the backlight from low to high depending on the environment in which you are using the computer.
Options for Backlight Level may include Low, Level 1, Level 2, Level 3, Level 4, and High.
Level 2 (CK61)
High (CK3, CN3, CN4, and CV30)
Device Settings > Display > Backlight > External or Battery Power > Backlight Level