This is a proof of concept, investigator blinded study to evaluate the efficacy and safety of a novel combination of a home narrow band ultraviolet B (NBUVB) lamp with an occlusive dressing in adult subjects with mild to moderate psoriasis vulgaris. Two interpatient arms will be used to compare the efficacy of combination of NBUVB with an occlusive dressing (active) to no treatment (control). 32 patients will be enrolled in this 30 week study.