Inclusion criteria:  Must be able to understand and provide written informed consent Must have a diagnosis of systemic scleroderma with cutaneous sclerosis, morphea, or sclerodermatous Graft vs. host disease based on the presence of characteristic clinical findings Age of at least 18-years-old Ability to engage in 30 UVA-1 treatments in a maximum of 100 days.  Exclusion criteria:  Inability to complete study visits UV light therapy in the 4 weeks prior to entering the study Commercial tanning in the 4 weeks prior to entering the study Current pregnancy or planned pregnancy during the study period History of intolerance to ultraviolet light Any other condition that will disqualify the patient from the study in the opinion of the investigator