Probably yes. If you have Dell Quickset installed, it may add various items to the Windows Mobility Center. On my older XPS, on Windows Mobility Center under the Customized by Dell section, in the Keyboard Backlighting tile, you would click the icon in the upper left corner. That opens a Keyboard Backlighting settings panel, within which you can change how long a delay before the backlight turns off.   [IMAGE]  
Hi I have Dell inspiron 5559 15.6 and the keyboard has backlight. Is it possible to make the time of being it On longer? 
Making backlight time longer (inspiron 5559)