Bedrosian and Nelson studied how being exposed to light at night influences wellbeing and mood. They share that “Many systems are under circadian control, including sleep–wake behavior, hormone secretion, cellular function and gene expression. Circadian disruption by nighttime light perturbs those processes and is associated with increasing incidence of certain cancers, metabolic dysfunction and mood disorders. . . .
Perceptions trump reality and moods matter
Lamb and Kwok looked at the effects of workplace stressors on performance. They report on a study that collected data from office workers over 8 months: “Participants completed a total of 2261 online surveys measuring perceived thermal comfort, lighting comfort and noise annoyance, measures of work performance, and individual state factors underlying performance and wellbeing.
Lasauskaite and Cajochen linked mental effort intensity and light color. The team “tested effort-related cardiac response under four lighting conditions and found that it decreased with color temperatures [i.e., as light got bluer]. Thus, blue-enriched light in offices and schools might . . . preserve resources during cognitive activities.”
Ruta Lasauskaite and Christian Cajochen. 2016. “Influence of Lighting Color Temperature on Mental Effort.” Psychology of Architecture Conference (December 4-5, Austin, TX) Program, p. 26.
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