Evening light exposure to computer screens disrupts human sleep, biological rhythms, and attention abilities
Abstract
The use of electronic devices with light-emitting screens has increased exponentially in the last decade. As a result, humans are almost continuously exposed to unintentional artificial light. We explored the independent and combined effects of two aspects of screen illumination, light wavelength, and intensity, on sleep, its biological regulation, and related functional outcomes. The 2 × 2 repeated-measure design included two independent variables: screen light intensity (low ([LI] versus high [HI]) and wavelength (short [SWL] versus long [LWL]). Nineteen participants (11F, 8M; mean age 24.3 [±2.8] years) underwent four light conditions, LI/SWL, HI/SWL, LI/LWL, and HI/LWL, in counterbalanced order. Each light exposure lasted for two hours (21:00-23:00), following which participants underwent an overnight polysomnography. On each experimental night, oral temperature and urine samples (for melatonin analysis) were collected at multiple time points. Each morning, participants filled out questionnaires and conducted a computerized attention task. Irrespective of light intensity, SWL illumination significantly disrupted sleep continuity and architecture and led to greater self-reported daytime sleepiness. SWL light also altered biological rhythms, subduing the normal nocturnal decline in body temperature and dampening nocturnal melatonin secretion. Light intensity seemed to independently affect sleep as well, but to a lesser degree. Both light intensity and wavelength negatively affected morning attention. In sum, light wavelength seems to have a greater influence than light intensity on sleep and a wide-range of biological and behavioral functions. Given the widespread use of electronic devices today, our findings suggest that screen light exposure at evening may have detrimental effects on human health and performance.
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Short-wavelength light on the preceding evening reduced next-morning alertness because its alerting effects in the evening may have interfered with the subsequent sleep.
“Thus, short-wavelength light on the preceding evening reduced next-morning alertness because its alerting effects in the evening may have interfered with the subsequent sleep.”
From Preliminary Results: The Impact of Smartphone Use and Short-Wavelength Light during the Evening on Circadian Rhythm, Sleep and Alertness (2021) · cites this paper as [41]
Cites
The Pittsburgh Sleep Quality Index: a new instrument for psychiatric practice and research
Buysse, D. J., Reynolds, C. F., Monk, T. H., Berman, S. R., & Kupfer, D. J. (1989) · Psychiatry Research · doi:10.1016/0165-1781(89)90047-4 · Cited by 35,234 · see citing works
A New Method for Measuring Daytime Sleepiness: The Epworth Sleepiness Scale
Johns, M. W. (1991) · Sleep · doi:10.1093/sleep/14.6.540 · Cited by 17,364 · see citing works
The brief symptom inventory: an introductory report.
Derogatis, L. R., & Melisaratos, N. (1983) · Psychological Medicine · doi:10.1017/s0033291700048017 · Cited by 6,650 · see citing works
A self-assessment questionnaire to determine morningness- eveningness in human circadian rhythms
Home, J. K. (1976) · Medical Entomology and Zoology · Cited by 4,783 · see citing works
Hattar, S., Liao, H.-W., Takao, M., Berson, D. M., & Yau, K.-W. (2002) · Science · doi:10.1126/science.1069609 · Cited by 2,734 · see citing works
Action Spectrum for Melatonin Regulation in Humans: Evidence for a Novel Circadian Photoreceptor
Brainard, G. C., Hanifin, J. P., Greeson, J. M., Byrne, B., Glickman, G., Gerner, E., & Rollag, M. D. (2001) · The Journal of Neuroscience · doi:10.1523/jneurosci.21-16-06405.2001 · Cited by 1,930 · see citing works
Light Suppresses Melatonin Secretion in Humans
Lewy, A. J., Wehr, T. A., Goodwin, F. K., Newsome, D. A., & Markey, S. P. (1980) · Science · doi:10.1126/science.7434030 · Cited by 1,913 · see citing works
Chang, A.-M., Aeschbach, D., Duffy, J. F., & Czeisler, C. A. (2015) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1418490112 · Cited by 1,430 · cited 4× · see citing works
“Our results are consistent with previous reports on the effects of screen illumination on sleep which revealed prolonged sleep latency (Chang et al., 2015; Higuchi et al., 2005).”
BackgroundResultInfluentialRegulation of Mammalian Circadian Behavior by Non-rod, Non-cone, Ocular Photoreceptors
Freedman, M. S., Lucas, R. J., Soni, B. G., von Schantz, M., Muñoz, M., David-Gray, Z. K., & Foster, F. (1999) · Science · doi:10.1126/science.284.5413.502 · Cited by 841 · see citing works
Cajochen, C., Frey, S., Anders, D., Späti, J., Bues, M., Pross, A., Mager, R., Wirz-Justice, A., & Stefani, O. (2011) · Journal of Applied Physiology · doi:10.1152/japplphysiol.00165.2011 · Cited by 730 · see citing works
Regulation of the Mammalian Pineal by Non-rod, Non-cone, Ocular Photoreceptors
Lucas, R. J., Freedman, M. S., Muñoz, M., García-Fernández, J. M., & Foster, F. (1999) · Science · doi:10.1126/science.284.5413.505 · Cited by 525 · see citing works
Gradisar, M., Wolfson, A. R., Harvey, A. G., Hale, L., Rosenberg, R., & Czeisler, C. A. (2013) · Journal of Clinical Sleep Medicine · doi:10.5664/jcsm.3272 · Cited by 498 · see citing works
Melatonin, sleep disturbance and cancer risk
Blask, D. E. (2008) · Sleep Medicine Reviews · doi:10.1016/j.smrv.2008.07.007 · Cited by 452 · see citing works
Wood, B., Rea, M. S., Plitnick, B., & Figueiro, M. G. (2013) · Applied Ergonomics · doi:10.1016/j.apergo.2012.07.008 · Cited by 428 · cited 2× · see citing works
“Previous studies have shown that light from electronic devices can alter MLT secretion (Chang et al., 2015; Figueiro et al., 2011; Wood et al., 2013), thermoregulation (Higuchi et al., 2003, 2005), sleep physiology and sleepiness measures (Chang et al., 2015; Grønli et al., 2016; Higuchi et al.,…”
BackgroundResultThe effects of prior light history on the suppression of melatonin by light in humans
Hébert, M., Martin, S. K., Lee, C., & Eastman, C. I. (2002) · Journal of Pineal Research · doi:10.1034/j.1600-079x.2002.01885.x · Cited by 413 · cited 1× · see citing works
“Previous findings have shown differential daytime light exposure may affect nighttime light sensitivity in some individuals (Hébert et al., 2002).”
BackgroundMelatonin secretion and the incidence of type 2 diabetes
McMullan, C. J., Schernhammer, E. S., Rimm, E. B., Hu, F. B., & Forman, J. P. (2013) · JAMA · doi:10.1001/jama.2013.2710 · Cited by 369 · see citing works
Higuchi, S., Motohashi, Y., Liu, Y., & MAEDA, A. (2005) · Journal of Sleep Research · doi:10.1111/j.1365-2869.2005.00463.x · Cited by 358 · see citing works
Human responses to bright light of different durations
Chang, A., Santhi, N., St Hilaire, M., Gronfier, C., Bradstreet, D. S., Duffy, J. F., Lockley, S. W., Kronauer, R. E., & Czeisler, C. A. (2012) · The Journal of Physiology · doi:10.1113/jphysiol.2011.226555 · Cited by 295 · see citing works
Rüger, M., Gordijn, M. C. M., Beersma, D. G. M., de Vries, B., & Daan, S. (2006) · American Journal of Physiology-Regulatory, Integrative and Comparative Physiology · doi:10.1152/ajpregu.00121.2005 · Cited by 286 · see citing works
Efficacy of light therapy in nonseasonal depression: A systematic review
EVEN, C., Schroder, C. M., Friedman, S., & Rouillon, F. (2007) · Journal of Affective Disorders · doi:10.1016/j.jad.2007.09.008 · Cited by 249 · see citing works
Higuchi, S., Motohashi, Y., Liu, Y., Ahara, M., & Kaneko, Y. (2003) · Journal of Applied Physiology · doi:10.1152/japplphysiol.00616.2002 · Cited by 165 · see citing works
Measurement of melatonin in body fluids: Standards, protocols and procedures
de Almeida, E. A., Mascio, P. D., Harumi, T., Spence, D. W., Moscovitch, A., Hardeland, R., Cardinali, D. P., Brown, G. M., & Pandi-Perumal, S. R. (2010) · Child s Nervous System · doi:10.1007/s00381-010-1278-8 · Cited by 151 · see citing works
Shochat, T., Tzischinsky, O., Oksenberg, A., & Peled, R. (2007) · PubMed · Cited by 136 · see citing works
Cajochen, C., Kräuchi, K., Danilenko, K. V., & Wirz‐Justice, A. (1998) · Journal of Sleep Research · doi:10.1046/j.1365-2869.1998.00106.x · Cited by 130 · see citing works
Canadian Consensus Guidelines for the Treatment of Seasonal Affective Disorder
Lam, R. W. M. (1999) · Cited by 123 · see citing works
Heath, M., Sutherland, C., Bartel, K., Gradisar, M., Williamson, P., Lovato, N., & Micic, G. (2014) · Chronobiology International · doi:10.3109/07420528.2013.872121 · Cited by 122 · see citing works
The impact of light from computer monitors on melatonin levels in college students.
Figueiro, M. G., Wood, B., Plitnick, B., & Rea, M. S. (2011) · PubMed · Cited by 115 · see citing works
Grønli, J., Byrkjedal, I. K., Bjorvatn, B., Nødtvedt, Ø., Hamre, B., & Pallesen, S. (2016) · Sleep Medicine · doi:10.1016/j.sleep.2016.02.006 · Cited by 103 · see citing works
Effects of light on human circadian rhythms
Skene, D. J., Lockley, S. W., Thapan, K., & Arendt, J. (1999) · annales de biologie animale biochimie biophysique · doi:10.1051/rnd:19990302 · Cited by 88 · see citing works
Circadian rhythm sleep disorders (CRSD)
Dagan, Y. (2002) · Sleep Medicine Reviews · doi:10.1053/smrv.2001.0190 · Cited by 83 · see citing works
Self-citationRångtell, F. H., Ekstrand, E., Rapp, L., Lagermalm, A., Liethof, L., Búcaro, M. O., Lingfors, D., Broman, J.-E., Schiöth, H. B., & Benedict, C. (2016) · Sleep Medicine · doi:10.1016/j.sleep.2016.06.016 · Cited by 83 · see citing works
Temporal dynamics of late-night photic stimulation of the human circadian timing system
Zeitzer, J. M., Khalsa, S. B. S., Boivin, D. B., Duffy, J. F., Shanahan, T. L., Kronauer, R. E., & Czeisler, C. A. (2005) · American Journal of Physiology-Regulatory, Integrative and Comparative Physiology · doi:10.1152/ajpregu.00232.2005 · Cited by 76 · see citing works
Lavie, P., & Segal, S. (1989) · SLEEP · doi:10.1093/sleep/12.6.522 · Cited by 74 · see citing works
Acute and Phase-Shifting Effects of Ocular and Extraocular Light in Human Circadian Physiology
Rüger, M., Gordijn, M. C. M., Beersma, D. G. M., de Vries, B., & Daan, S. (2003) · Journal of Biological Rhythms · doi:10.1177/0748730403256650 · Cited by 58 · see citing works
Vigilance Levels During and After Bright Light Exposure in the First Half of the Night
Lavoie, S., Paquet, J., Selmaoui, B., Rufiange, M., & Dumont, M. (2003) · Chronobiology International · doi:10.1081/cbi-120025534 · Cited by 53 · see citing works
Suppression of melatonin by 2000-lux light in humans with closed eyelids
Hätönen, T., Alila‐Johansson, A., Mustanoja, S. M., & Laakso, M. (1999) · Biological Psychiatry · doi:10.1016/s0006-3223(98)00357-6 · Cited by 42 · see citing works
Effects of evening bright light exposure on melatonin, body temperature and sleep
Bunnell, D. E., TREIBER, S. P., Phillips, N. H., & Berger, R. J. (1992) · Journal of Sleep Research · doi:10.1111/j.1365-2869.1992.tb00003.x · Cited by 38 · see citing works
Effects of bright light pre‐exposure on sleep onset process
Komada, Y., Tanaka, H., Yamamoto, Y., Shirakawa, S., & Yamazaki, K. (2000) · Psychiatry and Clinical Neurosciences · doi:10.1046/j.1440-1819.2000.00717.x · Cited by 26 · see citing works
Effects of LED-backlit computer screen and emotional selfregulation on human melatonin production
Sroykham, W., & Wongsawat, Y. (2013) · Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) · doi:10.1109/embc.2013.6609847 · Cited by 21 · see citing works
The Effects of Evening Bright Light on Next-Day Sleep Propensity
Tzischinsky, O., & Lavie, P. (1997) · Journal of Biological Rhythms · doi:10.1177/074873049701200307 · Cited by 15 · see citing works
Effects of evening light on body temperature
Kubota, T., Uchiyama, M., Hirokawa, G., Ozaki, S., HAYASI, M., & Okawa, M. (1998) · Psychiatry and Clinical Neurosciences · doi:10.1111/j.1440-1819.1998.tb01057.x · Cited by 11 · see citing works
Zubidat, A. E., Nelson, R. J., & Haim, A. (2007) · Physiology & Behavior · doi:10.1016/j.physbeh.2007.08.024 · Cited by 9 · see citing works
Self-citation
Flagged first, then by citations
Cited by
Sorted by citations
Circadian rhythm dysregulation and restoration: the role of melatonin
Vasey, C., McBride, J., & Penta, K. (2021) · Nutrients · doi:10.3390/nu13103480 · Cited by 351 · see citing works
Neophytou, E., Manwell, L. A., & Eikelboom, R. (2021) · International Journal of Mental Health and Addiction · doi:10.1007/s11469-019-00182-2 · Cited by 231 · see citing works
Is Melatonin the Cornucopia of the 21st Century?
Ferlazzo, N., Andolina, G., Cannata, A., Costanzo, M. G., Rizzo, V., Currò, M., Ientile, R., & Caccamo, D. (2020) · Antioxidants · doi:10.3390/antiox9111088 · Cited by 189 · see citing works
Electronic media use and sleep in children and adolescents in western countries: a systematic review
Lund, L., Sølvhøj, I. N., Danielsen, D., & Andersen, S. (2021) · BMC Public Health · doi:10.1186/s12889-021-11640-9 · Cited by 188 · see citing works
Liu, S., Wing, Y. K., Hao, Y., Li, W., Zhang, J., & Zhang, B. (2019) · Sleep · doi:10.1093/sleep/zsy213 · Cited by 128 · see citing works
Bhat, S., Pinto-Zipp, G., Upadhyay, H., & Polos, P. G. (2018) · Sleep Health · doi:10.1016/j.sleh.2017.12.004 · Cited by 114 · see citing works
Bauducco, S., Pillion, M., Bartel, K., Reynolds, C., Kahn, M., & Gradisar, M. (2024) · Sleep Medicine Reviews · doi:10.1016/j.smrv.2024.101933 · Cited by 102 · see citing works
Pedersen, J., Rasmussen, M. G. B., Sørensen, S. O., Mortensen, S. R., Olesen, L. G., Brønd, J. C., Brage, S., Kristensen, P. L., & Grøntved, A. (2022) · JAMA Pediatrics · doi:10.1001/jamapediatrics.2022.1519 · Cited by 79 · see citing works
Höhn, C., Schmid, S. R., Plamberger, C. P., Bothe, K., Angerer, M., Gruber, G., Pletzer, B., & Hoedlmoser, K. (2021) · Clocks & Sleep · doi:10.3390/clockssleep3010005 · Cited by 61 · see citing works
“In our study display brightness was kept constantly at maximum, but different display brightness levels might affect the alerting effects in addition to the spectral characteristics in a similar manner as viewing distance or angle [41,47].”
BackgroundHenriksen, T. E. G., Grønli, J., Assmus, J., Fasmer, O. B., Schoeyen, H., Leskauskaite, I., Bjorke‐Bertheussen, J., Ytrehus, K., & Lund, A. (2020) · Journal of Sleep Research · doi:10.1111/jsr.12984 · Cited by 40 · see citing works
Kazemi, R., Alighanbari, N., & Zamanian, Z. (2019) · Health Promotion Perspectives · doi:10.15171/hpp.2019.32 · Cited by 15 · see citing works
Sleep Medicine - Asleep or Awake?
(2024) · doi:10.5772/intechopen.104201 · Cited by 5 · see citing works
- Authors
- Green, A., Cohen-Zion, M., Haim, A., & Dagan, Y.
- Affiliations
- Assuta Medical Center (IL)
- The Sleep and Fatigue Institute, Assuta Medical Center, Tel Aviv, Israel
- Tel Hai Academic College (IL)
- Corresponding author
- Green, A.
- Venue
- Chronobiology International
- Publisher
- Informa UK Limited
- Published
- 2017-05-26
- Volume
- 34
- Issue
- 7
- Pages
- 855-865
- ISSN
- 0742-0528 (ISSN-L)
- 1525-6073
- OpenAlex
- W2620369803
- Cited by
- 158
- References
- 42
- Citations by year
- 2026: 14 · 2025: 10 · 2024: 15 · 2023: 22 · 2022: 19 · 2021: 27 · 2020: 16 · 2019: 22 · 2018: 11 · 2017: 2
- FWCI
- 8.53
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Chronobiology International (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and Work-Related Fatigue
- Keywords
- evening light exposure, light wavelength, light intensity, sleep disruption, biological rhythms, melatonin secretion, body temperature, daytime sleepiness, attention, nocturnal light exposure, electronic devices
- MeSH terms
- Adult, Attention, Body Temperature Regulation, Circadian Rhythm, Computers, Female, Humans, Light, Male, Melatonin, Random Allocation, Risk Factors, Sleep, Sleep Wake Disorders, Time Factors, Biomarkers, Risk Assessment, Young Adult
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