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Effects of Red Light on Circadian Rhythm: A Comparison Among Lamps With Similar Correlated Color Temperatures Yet Distinct Spectrums
- Source :
- IEEE Access, Vol 9, Pp 59222-59230 (2021)
- Publication Year :
- 2021
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2021.
-
Abstract
- Blue crest between the wavelength of 460 nm and 480 nm was reported to present melatonin suppression effects, whereas effects of red light on circadian rhythm regulation remain unclear. Spectrum plays an important role in circadian rhythm regulation, yet a lot of researches focused on the correlated color temperature, although a correlated color temperature value corresponds to various possible spectrums. Here, we performed human factor experiments with 3 lamps on 17 participants, comprising 9 males and 8 females. Our results showed that spectrums with high blue intensity tended to cause abnormal regulations of melatonin and cortisol, while the abnormalities were likely to be compensated by the 606-635-nm red light, which was indispensable for the photo-biological effects concerning circadian rhythm regulation. Abnormal circadian rhythm regulation was also found to be influenced by the illuminance, as abnormalities were significant in 500 lux whereas they were likely to disappear in 250 lux, implying the existence of threshold doses to trigger abnormities concerning circadian rhythm regulation. Furthermore, circadian rhythm responses were distinct between males and females. Our work may have implications for the development of light source, as we suggest that lighting source designers should increase the 606-635-nm intensity for bed room luminaires to decrease melatonin suppression effects.
- Subjects :
- long-wavelength red light
medicine.medical_specialty
General Computer Science
Spectral power distribution
Color temperature
Biology
01 natural sciences
narrow blue crest
Melatonin
03 medical and health sciences
0302 clinical medicine
Light source
Internal medicine
0103 physical sciences
medicine
General Materials Science
Circadian rhythm
Red light
Electrical and Electronic Engineering
010302 applied physics
General Engineering
TK1-9971
Endocrinology
Abnormal circadian rhythm
gender difference
circadian rhythm regulation
Electrical engineering. Electronics. Nuclear engineering
030217 neurology & neurosurgery
medicine.drug
Subjects
Details
- ISSN :
- 21693536
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- IEEE Access
- Accession number :
- edsair.doi.dedup.....2e2a1aebcf8e5aef159d40b837a9a19b