Affiliations: Design Concepts Unlimited, P.O. Box 454, Sausalito, CA 94966, USA. Tel.: +1 415 332 8382; Fax: +1 415 332 9022; E-mail: Betsybrawley@att.net; Website: www.betsybrawley.com | Tree of Life Services, Richmond, VA, USA
Abstract: Good lighting is perhaps the most important and least understood element in designing healthcare environments. Both physically and mentally challenged individuals become more vulnerable and dependent on their environment to compensate for sensory impairments, including dimming eyesight, which interferes to some degree with daily activities as well as social and leisure activities – the things that provide emotional and social well-being. Too few building designs today result in lighting that meets the needs of these individuals, regardless of age. Typical lighting in most care environments is inadequate to meet lighting needs affecting both vision and the photobiological (non-visual) needs of synchronization of circadian rhythm, which impacts sleep and depression. Well-designed lighting is one of the most important design elements that will support an individual's ability to perform normal daily activities and decrease the level of disability associated with these impairments. Daylight contains the spectrum to which the circadian clock is most sensitive and provides higher light levels during the day. Easily accessible outdoor gardens encourage individuals outside, providing the necessary regular exposure to direct bright light that sunlight provides. The combination good interior lighting and regular daylight exposure contributes to regaining and maintaining an active and fulfilling lifestyle – greatly improving quality of life.
Keywords: Lighting, adaptive healthcare environments, rehabilitation, light for vision, light for health, light quality, daylighting, glare, sunlight, sleep
