What skin creams can I use to make my skin lighter by 3 shades permanently?

Ive done a lot of research on products about skin bleaching & lightening. Now im not extremely dark but i am darker than i was as a teen... Can anyone tell me any skin creams that i can use that will permanently lighten my skin & not make me go back to my original color after i have stopped using the cream? I can never get a straight answer from anyone on names of creams. I do not want to be white but i want to be at least 3 shades lighter, I can not show picks so please answer as best you can.