The Impact of Artificial Sunlight on Human Sleep and Circadian Rhythms

NCT ID: NCT03636360

Last Updated: 2021-03-30

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

10 participants

Study Classification

INTERVENTIONAL

Study Start Date

2019-07-01

Study Completion Date

2021-03-01

Brief Summary

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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

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Conditions

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Sleep Circadian Dysregulation Mood

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

CROSSOVER

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

SINGLE

Participants
Participants will be aware that the lighting conditions will vary during their visits, but will not be aware of the nature of the difference in the lights.

Study Groups

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LED - Sunlike

LED lighting with spectral pattern similar to that of sunlight

Group Type EXPERIMENTAL

Light

Intervention Type DEVICE

15 hours of light exposure

Fluorescent

Fluorescent light at same illuminance (lux) as LED light

Group Type ACTIVE_COMPARATOR

Light

Intervention Type DEVICE

15 hours of light exposure

Dim

Dim fluorescent light with same spectrum as "Fluorescent" condition

Group Type PLACEBO_COMPARATOR

Light

Intervention Type DEVICE

15 hours of light exposure

LED

Standard LED lighting

Group Type ACTIVE_COMPARATOR

Light

Intervention Type DEVICE

15 hours of light exposure

Interventions

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Light

15 hours of light exposure

Intervention Type DEVICE

Eligibility Criteria

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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
Minimum Eligible Age

18 Years

Maximum Eligible Age

35 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Seoul Semiconductor

UNKNOWN

Sponsor Role collaborator

VA Palo Alto Health Care System

FED

Sponsor Role lead

Responsible Party

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Jamie M. Zeitzer, Ph.D.

Associate Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Locations

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VA Palo Alto Health Care System

Palo Alto, California, United States

Site Status

Countries

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United States

Other Identifiers

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Sunlike

Identifier Type: -

Identifier Source: org_study_id

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