MED in UVB Devices in the Presence and Absence of UV Filter

Inclusion Criteria: * Male and female subjects older than 18 years of age. * Good health as determined by lack of clinically significant abnormalities in medical history and clinical assessment, as judged by the Investigator. * Subject is capable of understanding and willing to provide a signed and dated written voluntary informed consent before any protocol specific procedures are performed. * The subject is able to complete the study and comply with study instructions, including attending all study visits. * If a female subject of childbearing potential, subject has a negative urine pregnancy test. Exclusion Criteria: * Subject has a history of being non-responsive to UVB therapy * Subject received phototherapy in the past four weeks * Subject used topical therapy within two weeks from baseline (Excluding emollients) * Subject has used experimental drugs or devices at least one month prior to Baseline * Subject has a known history of Photosensitivity disorder (Including Xeroderma pigmentosum, SLE, Cockayne Syndrome, Bloom Syndrome) or is currently taking any medication that causes photosensitivity that requires they avoid sunlight. * Subject has other serious skin disorder or any chronic medical condition that is not well controlled. * Subject has major illness within 30 days prior to the Baseline visit. * Subject has history of any immunocompromising disease. * Subject is pregnant or nursing. Pregnant and nursing females will not be allowed in the study, and females of …