This is a step-by-step manual of protocols for ultraviolet light therapy in the dermatologist's office. It provides technical information for UVB, PUVA, outpatient daycare, RePUVA, UVA/UVB combination, hand and foot therapy, scalp treatments, and hydrotherapy. It contains examples of patient education handouts, consent forms, laboratory flow sheets, forms for insurance companies, tools for the quantitative measurement of psoriasis severity, and more.