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OpenTrials
Completed

NCT Number: NCT02216318

Energy-efficient and Health Promoting Light for Elderly People

to investigate the effect of two lightning conditions on sleep hypothesizing that sleep length is influenced by the color of light during daytime

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Key information

Conditions

Sleep

Age range

65 year–85 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

About this study

Lightning conditions seems to be important for the length and quality of sleep, as light have an influence on the production of the sleep hormone (melatonin) and the the circadian rhythm. Entrainment of the circadian rhythm to the surroundings is accomplished by light-sensitive retinal ganglion cells and these cells are sensitive to blue light.

Based on previous research, blue light early in the day and abscence of blue light during evening is important for the entrainment.

In this study, lightning conditions in the home of healthy subjects are set to either blue enriched or red enriched from 8 a.m to 1. p.m. The lightning condition is based on a randomization protocol in a cross-over study for 3 weeks in each condition, separated by a one week pause.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • age 65 to 85 years

Exclusion criteria

  • Conditions which will interfere by the primary endpoint as evaluated by the medical doctor

Treatment and study plan

Blue Light

Other

Primary outcomes

  1. Sleep length

    Time frame: 1 week

    The mean of sleep length during the last week of each light period

Secondary outcomes

  1. actigraphy

    Time frame: 1 week

    mean sleep efficiency during the last week in each light period

Other outcomes

  1. pupillometry

    Time frame: the last day of each light period

    the pupillary response to blue and red light

  2. melatonin

    Time frame: the last day of each light period

    timing of melatonin onset

  3. Questionnaire

    Time frame: 3 weeks

    Questionnaire count

Sponsors and collaborators

Lead sponsor

Glostrup University Hospital, Copenhagen

Other

Collaborators

  • AF Lightning
  • Albertslund Kommune
  • DTU Fotonik
  • Elforsk
  • Gate 21
  • Philips Healthcare
  • Statens Byggeforskningsinstitut
  • VISO systems

Registry information

Official study title

A Study of Two Different Light Conditions for Healthy Subjects Above 65 Years

Acronym: light-age

Important dates

Study start
2013
Primary completion
2013
Study completion
2013
First posted
Aug 13, 2014
Registry last updated
Aug 6, 2018

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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