kontodimos Not  all  Inspiron SE 7720 comes with a backlit  keyboard, it is not standard on some models.     Z.................................. 
I have got an Inspiron SE 7720. Dell page informs that a backlit keyboard is standard, but when i bought my laptop NO backlit keyboard. When i tried to contact DELL_GREECE  and receive some answers they were extremely rude and they wanted me to pay for an extra backlit keyboard. I am 20 years DELL customer with 4 laptops from DELL and i never thought that i would have this kind of behaviour fron customer support. I need some plain and clear answers. Why my Inspiron SE 7720 has not a standard backlit keyboard as your webpage and DELL-GREECE webpage informs us
Inspiron 17R SE 7720, backlit keyboard