Will cinnamon lighten my hair?

My hair is chocolate brown with natural bronze and blonde highlights. I don't wanna damage my hair anymore by dyeing it lighter, so I looked up natural ways. Is it true that if you mix equal parts of cinnamon and conditioner that it will lighten your hair? If so, how much does it lighten hair? How much lighter would my hair be? Do I have to do it a few times? Is it gradual? I am going to leave it on overnight. :) Thanks!