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Senior Living

Older adults often experience visual impairment and increased risk for falls. They are also 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 spectral power distribution to better entrain their circadian systems. The lighting patterns presented here 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.

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