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OpenTrials
Completed

NCT Number: NCT03636360

The Impact of Artificial Sunlight on Human Sleep and Circadian Rhythms

The purpose of this study is to examine, in healthy controls, whether LED lighting that has a color spectrum similar to that of sunlight is able to differentially impact mood, circadian rhythms, sleep, and behavior, as compared to standard fluorescent lighting.

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Key information

Conditions

Sleep Chronobiology Disorders Circadian Dysregulation Mood Nervous System Diseases

Age range

18 year–35 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

VA Palo Alto Health Care System

Palo Alto, California, 94304, United States

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

  • Good self-reported health
  • Normal color vision

Exclusion criteria

  • No sleep disorders
  • No extreme chronotype
  • Regular smoker
  • Significant hearing loss
  • Depression
  • Alcohol use disorder
  • Use of illegal drugs
  • Pregnant

Treatment and study plan

Light

Device

15 hours of light exposure

Primary outcomes

  1. Alertness

    Time frame: 15 hours

    Change in median reaction time score on the auditory psychomotor vigilance test

  2. Melatonin suppression

    Time frame: 3 hours

    Amount of reduction in the concentration of salivary melatonin concentrations during an experimental light stimulus

Secondary outcomes

  1. Mood

    Time frame: 15 hours

    Change in total positive and negative affect scores on the Positive and Negative Affect Schedule (PANAS)

Sponsors and collaborators

Lead sponsor

VA Palo Alto Health Care System

Fed

Collaborators

  • Seoul Semiconductor

Registry information

Important dates

Study start
2019
Primary completion
2021
Study completion
2021
First posted
Aug 17, 2018
Registry last updated
Mar 30, 2021

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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