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The Effect of a Dynamic LED Light Intervention on Sleep Quality of Adolescent Students

Andersson Eriksson, Stina LU and Wingren, Karin LU (2016) BMEM01 20161
Department of Biomedical Engineering
Abstract
Objective: Previous studies have revealed positive effects on subjective alertness, performance and general sleep patterns, with exposure to light conditions adapted to time of day according to the circadian system. This study aimed to investigate the impact of a dynamic LED light intervention on sleep quality of adolescent students. Methodology: Twenty eight seventh-grade subjects were recruited for the intervention study divided into one control group and one intervention group. After ensured baseline comparability of the groups, the intervention group was exposed to a dynamic light regime (ranging from 2700 to 6500 K and 535 to 1050 lux), during two one-week periods. Jawbone activity trackers, Karolinska sleepiness scale (KSS) and sleep... (More)
Objective: Previous studies have revealed positive effects on subjective alertness, performance and general sleep patterns, with exposure to light conditions adapted to time of day according to the circadian system. This study aimed to investigate the impact of a dynamic LED light intervention on sleep quality of adolescent students. Methodology: Twenty eight seventh-grade subjects were recruited for the intervention study divided into one control group and one intervention group. After ensured baseline comparability of the groups, the intervention group was exposed to a dynamic light regime (ranging from 2700 to 6500 K and 535 to 1050 lux), during two one-week periods. Jawbone activity trackers, Karolinska sleepiness scale (KSS) and sleep logs were used for objective and subjective assessments of sleep quality. Result: Statistically significant effects were observed between groups, during the second study week (Mon-Wed), implicating an increased sleep quality in terms of number of awakenings (p = 0.024, p = 0.064 and p = 0.087) and sleep efficiency (p = 0.050, p = 0.077 and p = 0.052). Self-reported sleepiness showed no significant difference between studied groups. Conclusion: The present study suggests that the dynamic light intervention leads to improved sleep quality in terms of less number of awakenings and increased sleep efficiency. Future research are required for validation of the result. (Less)
Popular Abstract
THE EFFECT OF LIGHT
- How Dynamic LED Lighting can improve Sleep Quality

Until recently, light has only been defined in terms of the human visual system. However, discoveries in the late 1990s revealing the relationship between light exposure and the inner biological clock, led to an understanding of the importance of light regulation for human health, wellbeing and furthermore maintaining the sleep-wake cycle. This master’s thesis presents an interventional study revealing results suggesting that a dynamic light intervention, programmed to follow the natural daylight pattern, leads to improved sleep quality.
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author
Andersson Eriksson, Stina LU and Wingren, Karin LU
supervisor
organization
course
BMEM01 20161
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Sleep quality, Adolescence, Light measurements, Activity tracker, Circadian rhythm, School environment, Keywords: Dynamic LED light
language
English
additional info
2016-04
id
8876069
date added to LUP
2016-06-02 13:37:09
date last changed
2016-06-02 13:37:09
@misc{8876069,
  abstract     = {Objective: Previous studies have revealed positive effects on subjective alertness, performance and general sleep patterns, with exposure to light conditions adapted to time of day according to the circadian system. This study aimed to investigate the impact of a dynamic LED light intervention on sleep quality of adolescent students. Methodology: Twenty eight seventh-grade subjects were recruited for the intervention study divided into one control group and one intervention group. After ensured baseline comparability of the groups, the intervention group was exposed to a dynamic light regime (ranging from 2700 to 6500 K and 535 to 1050 lux), during two one-week periods. Jawbone activity trackers, Karolinska sleepiness scale (KSS) and sleep logs were used for objective and subjective assessments of sleep quality. Result: Statistically significant effects were observed between groups, during the second study week (Mon-Wed), implicating an increased sleep quality in terms of number of awakenings (p = 0.024, p = 0.064 and p = 0.087) and sleep efficiency (p = 0.050, p = 0.077 and p = 0.052). Self-reported sleepiness showed no significant difference between studied groups. Conclusion: The present study suggests that the dynamic light intervention leads to improved sleep quality in terms of less number of awakenings and increased sleep efficiency. Future research are required for validation of the result.},
  author       = {Andersson Eriksson, Stina and Wingren, Karin},
  keyword      = {Sleep quality,Adolescence,Light measurements,Activity tracker,Circadian rhythm,School environment,Keywords: Dynamic LED light},
  language     = {eng},
  note         = {Student Paper},
  title        = {The Effect of a Dynamic LED Light Intervention on Sleep Quality of Adolescent Students},
  year         = {2016},
}