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Senior Living

Older adults are susceptible to circadian disruption that can affect their sleep quality, alertness, and mood. To help improve their quality of life, it is recommended that seniors in eldercare environments receive defined amounts of light at the correct spectrum to better entrain their circadian systems. The lighting patterns were designed to provide these seniors with appropriate amounts of circadian stimulus at the right time of day, and thereby improve their circadian entrainment and quality of life.


Adolescents’ tendency to be “late to bed and late to rise” puts them at odds with structured school schedules. As they approach college age they experience progressively later sleep onset and reduced sleep times. The resulting sleep disorders can lead to poor scholastic performance and behavioral problems. Improved classroom lighting design can foster better scholastic and health outcomes by helping to shift the timing of sleep and promote entrainment to the 24-hour solar day.


Healthcare environments have diverse populations with a variety of visual and circadian needs. Healthcare providers require lighting for alertness and circadian entrainment for shift workers. Patients require lighting to stimulate their circadian system while providing enough light for examinations. With both patients and healthcare providers sharing the environment, lighting tailored for both populations’ circadian needs is necessary.




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