Vitiligo is a chronic acquired cutaneous disease of pigmentation that affects patients' quality of life across all degrees of involvement and severity. Phototherapy is a clinically indicated treatment for skin lesions. Treatments are usually administered in an outpatient setting, typically three times per week. This is a proof-of-concept study as there are few well-designed prospective clinical studies showing the efficacy of NB-UVB phototherapy in the treatment of vitiligo in terms of repigmentation and quality of life. The following are the proposed objectives of this study: