Chronic pain is a major complaint among many individuals living with hypermobile Ehlers Danlos Syndrome (hEDS) and may have a severe impact on quality of life and activities of daily living. Given the complexity of the disease's pathophysiology, effective treatments are limited. This investigation will examine the impacts of green light exposure on subject-reported pain severity and symptoms. Knowing whether this intervention can improve pain and quality of life in this population may offer valuable guidance to clinicians who treat hEDS patients and to hEDS patients themselves.