If I'm not mistaken...the lemon juice trick will work if you're out in the sun a lot. There is a product that you can buy that does the same thing as lemon juice. Idk much about it nor do I remember the name but I saw it at Walgreens I believe. I've never tried either one, but if it does lighten your hair it's not going to be drastic. Can't a 20 developer lighten your hair a bit?