Acute exposure to evening blue‐enriched light impacts on human sleep

Chellappa, Sarah Laxhmi; Steiner, Roland; Oelhafen, P.; Lang, Dieter; Götz, Thomas; Krebs, Julia; Cajochen, Christian

doi:10.1111/jsr.12050

Cited by 220 publications

(162 citation statements)

References 28 publications

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“…According to the National Sleep Foundation (NSF), the recommended room temperature for effective sleep is around 18°C (NSF, 2017). Blue spectrum light, which suppresses melatonin production necessary for sleep onset, is emitted by electronic devices such as laptops, tablets and smartphones (Chellappa et al, 2013). These, and other light emitting sources, are ubiquitous to HE student life and we need to know more about any strategies students use to decrease sleep inhibiting exposure before bed.…”

Section: Contributing Factors To Sleep Deficiency and Help Seeking Bementioning

confidence: 99%

“…A second example are the strategies, reported by many students, of reading a book and watching TV to ease into sleep. However, TVs and e-books may also increase exposure to blue spectrum light, therefore suppressing melatonin production and altering circadian rhythm (Chellappa et al, 2013).…”

Section: Interpreting Residence-living Students' Sleep Patterns and Bmentioning

confidence: 99%

“…Finally, temperature, light exposure and sound are frequently overlooked detrimental effects on sleep (Li & Lian, 2016;Chellappa et al, 2013;Mestre, 2008). Student accommodations can be challenging environments with high-density living, little choice of roommate, and limited control over noise and/or temperature.…”

Section: Contributing Factors To Sleep Deficiency and Help Seeking Bementioning

confidence: 99%

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Sleep Practices of University Students Living in Residence

Qin

Brown

2017

IJHE

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Sleep plays an important role in both students' academic and personal life. Despite widespread sleep problems among young adults, few studies focus on higher education students living in campus residence. This study investigated residence-living students' sleep patterns, sleep promoting practices, sources of help seeking, and preferred ways to receive information. Results highlighted that 66.8% of the participants did not think they had enough sleep. However, only 18.9% of the students sought help. The campus residence sleep environment was challenging for many students. Problems such as uncomfortable room temperature and noise were frequently identified. Students used different strategies to promote sleep such as opening the window, reading books, listening to music, and alcohol. Efficient knowledge translation activities to facilitate the understanding of sleep physiology and sleep problem solving are needed at both the student and the organizational planning/administration level. Further studies focusing specifically on sleep environment scans and developing best practice guidelines are recommended.

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Section: Contributing Factors To Sleep Deficiency and Help Seeking Bementioning

confidence: 99%

Section: Interpreting Residence-living Students' Sleep Patterns and Bmentioning

confidence: 99%

Section: Contributing Factors To Sleep Deficiency and Help Seeking Bementioning

confidence: 99%

See 1 more Smart Citation

Sleep Practices of University Students Living in Residence

Qin

Brown

2017

IJHE

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“…Short wavelength light has been shown to reduce accumulated sleep pressure and this effect was seen at light levels as low as 40 lux [26]. This blue-light sensitivity has led to the recent development and testing of both blue light and blue-enriched polychromatic light in a variety of populations [27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Blue-Enriched Lighting for Older People Living in Care Homes: Effect on Activity, Actigraphic Sleep, Mood and Alertness

Hopkins

Morgan

Schlangen

et al. 2017

CAR

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Environmental (little outdoor light; low indoor lighting) and age-related physiological factors (reduced light transmission through the ocular lens, reduced mobility) contribute to a light-deprived environment for older people living in care homes. This study investigates the effect of increasing indoor light levels with blueenriched white lighting on objective (rest-activity rhythms, performance) and self-reported (mood, sleep, alertness) measures in older people. Eighty residents (69 female), aged 86 ± 8 yrs (mean ± SD), participated (MMSE 19 ± 6). Overhead fluorescent lighting was installed in communal rooms (n=20) of seven care homes.Four weeks of blue-enriched white lighting (17000 K  900 lux) were compared with four weeks of control white lighting (4000 K  200 lux), separated by three weeks wash-out. Participants completed validated mood and sleep questionnaires, psychomotor vigilance task (PVT) and wore activity and light monitors (AWL). Restactivity rhythms were assessed by cosinor, non-parametric circadian rhythm (NPCRA) and actigraphic sleep analysis. Blue-enriched (17000 K) light increased wake time and activity during sleep decreasing actual sleep time, sleep percentage and sleep efficiency (p < 0.05) (actigraphic sleep). Compared to 4000 K lighting, blueenriched 17000 K lighting significantly (p < 0.05) advanced the timing of participants' rest-activity rhythm (cosinor), increased daytime and night-time activity (NPCRA), reduced subjective anxiety (HADA) and sleep quality (PSQI). There was no difference between the two light conditions in daytime alertness and performance (PVT). Blue-enriched lighting produced some positive (increased daytime activity, reduced anxiety) and negative (increased night-time activity, reduced sleep efficiency and quality) effects in older people.Keywords: care home, light therapy; mood; elderly; rest-activity; sleep. 3 Graphical AbstractThe effect of blue-enriched 17000 K lighting (right) on the rest-activity, sleep and mood of older people living in care homes has been investigated compared to control 4000 K lighting (middle) (left, original lighting) 4

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“…Comme autre exemple, augmenter l'intensité lumineuse dans les institutions pour patients âgés souffrants de démence ralentit la progression des symptômes, augmente l'activité le jour et la diminue la nuit, et améliore donc potentiellement la qualité du sommeil (un facteur important dans la difficulté de la prise en charge et l'activité nocturne des patients) [31]. Il ne faut cependant pas s'exposer tout le temps à trop de lumière : une lumière excessive en soirée peut rendre le sommeil plus difficile à initier et moins profond en début de nuit [32], et peut retarder notre horloge circadienne [1]. ‡…”

Section: Conclusion : La Lumière Pour Optimiser La Cognitionunclassified

La lumière comme stimulant de l’activité cognitive cérébrale

Vandewalle

2014

Med Sci (Paris)

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Acute exposure to evening blue‐enriched light impacts on human sleep

Abstract: Keywords non-image-forming system, non-rapid eye movement sleep, polychromatic blue light, sleep electroencephalographic power density, slow wave activity Correspondence

Cited by 220 publications

References 28 publications

Sleep Practices of University Students Living in Residence

Sleep Practices of University Students Living in Residence

Blue-Enriched Lighting for Older People Living in Care Homes: Effect on Activity, Actigraphic Sleep, Mood and Alertness

La lumière comme stimulant de l’activité cognitive cérébrale

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