If you want to lighten your hair I would honestly not trust anyone even the instructors. I would go to a professional and yes I know it's going to cost more but worth it. I did a blonde retouch and the girl left the bleach on over an hour I called her and her instructor out on it. They tried saying it's fine but it wasn't. They fried the shit out in my poof virgin hair :( my hair was pretty much grown out just the tips were blonde. Im not exaggerating I'm just very disappointed. I haven't colored my hair in 8 months then I do and that's what I get for it I guess. I understand they are learning so that's why I said go see a professional to lighten hair.