Skip to content
Bored Studies
RecruitingAccepts healthy volunteers

Effect of Morning Light Exposure on Mood

University of Arizona · with U.S. Army Medical Research Acquisition Activity · NCT05616819

View Study & Apply (opens in a new tab)

Opens the official ClinicalTrials.gov record, with the study team’s contacts. Bored Studies doesn’t enroll anyone.

Key facts

Compensation
Not posted. Ask the study team before screening.
Who can join
Ages 18–60 · All sexes
Healthy volunteers
Accepted
Study type
Interventional · Not applicable
Target enrollment
480
US sites recruiting
1
Study start
July 1, 2023
Record last updated
November 4, 2025

Status re-checked against ClinicalTrials.gov within the last 12 hours.

What the study is about

Mood dysregulation and suicidal ideation are closely associated with disruption of sleep and circadian rhythms. Moreover, sleep problems and circadian disruption are commonplace features of military life. Critically, specifically timed light exposure plays a powerful role in regulating mood, circadian rhythms, and sleep-wake patterns. Therefore, investigators propose to conduct a large-scale clinical trial on the effectiveness of morning light exposure treatment for improving sleep-wake patterns, emotional and mental health, and suicidal thoughts in military personnel.

Being studied: Active light exposure; Placebo light exposure

Conditions: Suicidal Ideation; Regulation, Emotion

Eligibility criteria

Copied from the official record. The study team makes the final decision at screening.

Show full criteria

Inclusion Criteria

  • Ages 18-60 years
  • At least an 8th grade reading level
  • Score ≥ 5 (i.e., mild depression or greater) on the Patient Health Questionnaire 9 (PHQ-9)
  • Service member of any Armed Forces branch, including active duty, Reserve, or National Guard

Exclusion Criteria

  • Not actively serving in an Armed Force branch
  • Scored (i.e., \< 5) range on the PHQ-9 (non-depressed)
  • Pregnant or trying to become pregnant
  • Breastfeeding
  • History of psychotic disorder or manic episodes
  • Bipolar disorder
  • Diseases of the eye
  • Have had cataract surgery
  • Frequent and light-sensitive migraine headaches
  • Self-reported plan to regularly engage in nightshift work during the 6-week course of the study

Recruiting US locations

  • University of Arizona

    Tucson, AZ 85719

    Site contact: William DS Killgore · 520-621-0605 · killgore@psychiatry.arizona.edu

Study contacts (from the official record)

  • William D Killgore, Ph.D. · (520) 621-0605 · killgore@arizona.edu
  • Camryn Wellman · camrynwellman@arizona.edu
All sleep studies in Arizona →
Effect of Morning Light Exposure on Mood (NCT05616819) | Bored Studies