Well, my naturally dark brown so I brought a dye its say light
Brown on it (HerbaShine) then I dyed my hair, but still same
Colour, that's mean it was not work on my hair:-( I'm wondering how long
Should I dye my hair again? 4 or 6 weeks? Because I really want to getting
My hair light brown.

Can you give me any advice, thank you:-)

I would wait the 6 weeks. Dying your hair again too soon can cause serious irreversible damage to your hair. If you are in doubt, consult a licensed beautician for advice.

Thanks for your advice:-) Yes I believe you it could damage my hair if I dye early or quickly that why I aksed a question to make sure if am I correct it.

Thank you again:-)

And also I heard if I'm putting Honey and cinnamon mix up into the shmapoo to make my hair light brown, its more healthy than dye but Im not sure if its working, isn't?

I know that you can use lemon juice to lighten hair color, but I'm not sure if this would be good for dark brown hair because it might make it reddish color. I've never heard about honey and cinnamon to make hair a lighter brown. This might work if you had blonde hair trying to make it darker, but you need something that will lighten or bleach the hair a little bit.