Worksheet · Workplace
Circadian lighting does not reliably raise daytime alertness
The measured gains are sleep and mood: Boubekri and colleagues recorded 37 minutes more sleep under optimised daylight; on daytime alertness Grant reported a gain in 2021 and Schöllhorn found none in 2023.
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The evidence behind this sheet
23 factorsheets carry the studies for and against, each with how firm that evidence is.
- Circadian lighting probably raises sleep quality.
- Melanopic EDI raises sleep quality.
- Correlated colour temperature (CCT) probably raises sleep quality.
- Correlated colour temperature (CCT) probably lowers error rate.
- Circadian lighting probably raises circadian alignment.
- Correlated colour temperature (CCT) probably lowers fatigue.
- Correlated colour temperature (CCT) has a non-linear effect on mood.
- Correlated colour temperature (CCT) has a non-linear effect on visual comfort.
- Melanopic EDI probably raises circadian alignment.
- Melanopic EDI probably lowers fatigue.
- Correlated colour temperature (CCT) probably raises circadian alignment.
- Correlated colour temperature (CCT) has a non-linear effect on comfort.
- The evidence is very uncertain whether correlated colour temperature (CCT) affects working memory.
- The evidence is very uncertain whether melanopic EDI affects visual comfort.
- Circadian lighting probably lowers fatigue.
- The evidence is very uncertain whether circadian lighting affects visual comfort.
- The evidence is very uncertain whether correlated colour temperature (CCT) affects heart rate.
- The evidence is very uncertain whether correlated colour temperature (CCT) affects satisfaction.
- Correlated colour temperature (CCT) probably raises information processing.
- Circadian lighting shows no effect on sustained attention.
- The evidence is very uncertain whether melanopic EDI affects mood.
- Correlated colour temperature (CCT) has a non-linear effect on cognitive control.
- Circadian lighting probably raises mood.