Summary
This study protocol describes a controlled sleep laboratory investigation into how two hours of post-awakening monochromatic light exposure at varying wavelengths affects the cortisol awakening response, with the goal of building a spectral sensitivity model for lighting design. Secondary outcomes include effects on sleepiness, mood, and cognitive vigilance, which have direct implications for designing morning lighting environments in homes, workplaces, and healthcare settings.
Key Findings
- Pilot data collected for blue light (λmax = 476 nm) and red light (λmax = 649 nm) in a within-subjects sleep lab design with 4 healthy male adults (mean age 25.25 ± 3.59 years).
- Post-awakening light exposure window of 6:00â8:00 AM was used to capture the cortisol awakening response (CAR), which naturally peaks within the first hour after waking.
- This is a protocol paper; no outcome findings are reported yet, as the study was ongoing at time of publication.
Categories
Sleep & Circadian Health: Investigates how post-awakening light exposure of different spectral wavelengths affects the cortisol awakening response, a key circadian biomarker.
The Science of Light: Aims to derive a spectral sensitivity model for light-induced cortisol secretion using quasi-monochromatic light at controlled peak wavelengths.
Mood & Mental Wellness: Explores secondary outcomes including mood, sleepiness, and vigilance as potentially modulated by light-enhanced cortisol secretion.
Author(s)
S Babilon, P Myland, J Klabes, J Simon, TQ Khanh
Publication Year
2022
Number of Citations
2
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