You absolutely can, the right way. If we are talking about lightening using harsher methods like bleach, that is the fastest way to ensure a damaged head of locs, protein treatments, keratin treatments, and any other "treatment" may help, but the lightened hair will never be the same and with that may come shedding or breaking, and even worse loss of that entire lighter portion. Do your research, think on it, and if you so choose reach out to us!