10 seconds is the default. Access the BIOS, F2 at boot, and under System Configuration/Miscellaneous Devices  you will find the keyboard backlight setting for both the battery and when on adapter. That information is also available in the setup information of the owner's manual here.
Title. There is a special button for turning ON/OFF the Keyboard Lights, but, after 10 seconds, the Keyboard always dims. Is there a way to keep it lit all the time?
Dell Latitude 7410, is there a wayo to make keyboard to not dim?