A review of the effects of full-spectrum fluorescent lighting (FSFL) on human physiology and health, and on the protective or therapeutic effects that this type of artificial light may have. The study reviewed research conducted between 1941 and 1999 by various authors. Their research approach gives an overview of the present state of knowledge on the influences of FSFL on a wide variety of behaviors, mental health outcomes, and physical health effects. The authors surveyed three areas of inquiry: (1) whether the role that natural daylight plays in physiological processes (also known as the evolutionary hypothesis) may be duplicated with artificial lighting, particularly FSFL; (2) whether FSFL has been shown to improve health and well-being as compared to other types of artificial lighting; and 3) whether the ultraviolet light (UV) component of FSFL is critical to its behavioral effects.