How do i naturally highlight my hair with out using lemon juice or highlighting products?

i heard lemon juice is really BAD for your hair.!!!How do i naturally highlight my hair with out using lemon juice or highlighting products?
I spray my hair with leave in conditioner and then go out in the sun. It takes awhile, but my highlights start to show up in time.How do i naturally highlight my hair with out using lemon juice or highlighting products?
peroxide, like what you put on cuts.
Go in the sun.


It sounds dumb, but it worked for me this summer.