I depends on the color your hair starts out as. If your hair is really dark brown or black, then trying to lighten it without a professional is a poor choice. Your hair already has to be somewhat light for anything with chemicals to work without leaving hair brassy/orangey.I know a couple of girls who use sun-in, but in moderation because it has a tendency to do damage.You may also try a 50/50 mixture of hydrogen peroxide and water. Just make sure you spritz it on your hair, don't bathe in the stuff. The former two choices may damage, so you may try lemon juice, honey, cinnamon, or chamomile tea.