how can i get my hair from black to light brown naturally?

You can use use good product. or contact hair parlor.

Just go to the hair salon and explain what'd you like. Something like that will probably involve bleach, and that's best to leave to the professionals.

sit in the sun with lemon juice a lot or maybe use sun in

That is impossible, if you died your hair black, but you naturally have it brown, then you have to let it grow out, but if you have natural black hair, you can not change the color without dying it.

You can't really do it naturally, especially with having black hair.. I had really dark hair, almost black, and I wanted it blonde, so I had to bleach it.. Good luck in whatever you do though! :)

You can get a dark brown by putting lemon juice in your hair and sitting in the sun, but getting light brown with that method is almost impossible.