Paper Title
Effects of Ambient Lighting Conditions on Sleep Quality on Various Age Groups: A Systematic Review

Abstract
Light is the main stimulus which regulates circadian rhythm, seasonal cycles and the neuroendocrine responses in many species, including humans. Many studies have demonstrated that lighting impacts sleep quality of people and, therefore, influences individuals' overall health, well-being, and quality of life. The association of light and sleep quality depends,however, on many factors including the lighting characteristics (intensity, spectrum, timing, distribution, and duration). The characteristics of appropriate lighting conditions to improve peoples’ sleep quality, health and well-being vary for different age groups. It also varies depending on building types. The main purpose of this study is to evaluate the impacts of ambient lighting conditions on people’s sleep quality in three age groups: children and adolescents (6 – 17), adults (18 – 64), and older adults (>65) in the context of schools, offices, and long-term care environments respectively in order to identify the optimal lighting design parametersfor various age groups. Our findings suggest that there are valid data about the significant associations of ambient lighting and sleep quality of occupants in all age groups. However, further research is required to apply these data in an actionable lighting design guidelines for each age group and environmental contexts. Keywords - Lighting, Sleep Quality, Circadian Rhythms, Sleep Disorders, Students, Older Adults, Schools, Offices