Women who are lactating, pregnant, or planning to become pregnant;

Patients with a recent history of vitiligo, melasma, and other disorders of pigmentation with the exception of post-inflammatory hyperpigmentation;

Patients with a known history of photosensitivity disorders;

Photosensitizing medications may be continued throughout of the study at the discretion of the investigator ;

Patients with a known history of melanoma or non-melanoma skin cancers;

Concomitant use of tanning beds;

Sun exposure of the irradiated or control areas;

Patients with serious systemic disease.

Patients with a known history of hypersensitivity to adhesives including adhesive tape.

Visible Light Study