How Long Does Melalite Take To Lighten The Skin?

hi i have been using melalight 15 cream but i dont see much of changes, kindly let me know for how many days do i have to use it to lighten my skin???? & i am using it ion the night only..... i feel it is my skin is little dry & skin is peeling off , is there a day cream which i can use in a day for office use which will help me???....