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Effect of Morning Light Exposure on Mood
Regulating Mood and Suicidal Ideation With Morning Light Exposure Treatment
Who can join
Ages 18 to 60 · All sexes · Healthy volunteers welcome
Full eligibility 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
About the study
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.
What is being tested
- Active light exposure (other)
- Placebo light exposure (other)
Sponsor: University of Arizona · Participants: 480 · Started: Jul 1, 2023
Contact the study team
- William D Killgore, Ph.D. · Phone: (520) 621-0605
Official record on ClinicalTrials.gov — NCT05616819
Locations in the U.S.
| Arizona | University of Arizona, Tucson |
Conditions
From ClinicalTrials.gov, data retrieved Sep 30, 2026. Each study sets its own eligibility; the study team decides who can join.