The Impact of Artificial Sunlight on Human Sleep and Circadian Rhythms
Not Applicable
Completed
- Conditions
- MoodSleepCircadian Dysregulation
- Interventions
- Device: Light
- Registration Number
- NCT03636360
- Lead Sponsor
- VA Palo Alto Health Care System
- Brief Summary
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.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 10
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
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- CROSSOVER
- Arm && Interventions
Group Intervention Description LED Light Standard LED lighting Dim Light Dim fluorescent light with same spectrum as "Fluorescent" condition LED - Sunlike Light LED lighting with spectral pattern similar to that of sunlight Fluorescent Light Fluorescent light at same illuminance (lux) as LED light
- Primary Outcome Measures
Name Time Method Alertness 15 hours Change in median reaction time score on the auditory psychomotor vigilance test
Melatonin suppression 3 hours Amount of reduction in the concentration of salivary melatonin concentrations during an experimental light stimulus
- Secondary Outcome Measures
Name Time Method Mood 15 hours Change in total positive and negative affect scores on the Positive and Negative Affect Schedule (PANAS)
Trial Locations
- Locations (1)
VA Palo Alto Health Care System
🇺🇸Palo Alto, California, United States