Luma Light System Proof of Concept Study in Subjects With Mild to Moderate Psoriasis

Inclusion Criteria: * Male or female of any race, 18 to 65 (inclusive) years of age. * Verbal and written informed consent obtained from the subject. * Has a clinical diagnosis of mild to moderate psoriasis at the Screening and Baseline visits. * Has an IGA score of 2 or 3. * Target plaque assessment (TPA) score between 6-9 and a score of at least 2 for each of the 3 different psoriasis signs and symptoms (erythema, plaque elevation, and scaling) * Has at least 4 plaques of at least 10 cm2 with TPA scores not differing from each other by a score of more than 1 * Is in good general health as determined by the Investigator based on the subject's medical history, vital signs and physical examination. * Females of childbearing potential must have negative urine pregnancy test results. * Females of childbearing potential agree to use acceptable methods of contraception from the screening visit continuously until 30 days after end of treatment. * Subject agrees to use only the Sponsor provided cleanser and lotion during the study period. * Subject is willing and able to return for all study visits. Exclusion Criteria: * Presence of psoriasis that was previously treated with prescription medications prior to the Screening visit and was non-responsive to treatment, as determined by the Investigator. * Presence of any concurrent skin condition that could interfere with the evaluation of the study device, as determined by the Investigator. * Female who is pregnant, nursing an infant, or planning a pregnancy during the study period. * Treatment with any investigational drug or device within 30 days or 5 half-lives (whichever is longer) prior to the Baseline visit, or concurrent participation in another clinical trial with an investigational drug or device. * History of melanoma. * Subject has any medical, social or psychological conditions that, in the opinion of the Investigator, preclude them from receiving the pre-treatment, required treatment, and post-treatment procedures and evaluations.