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Effects of Combined Blue and Red Home-Based Light Therapy on Sleep in Adults With Self-Reported Sleep Difficulties

NCT07465250 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 20

Last updated 2026-03-12

No results posted yet for this study

Summary

The goal of this intervention is to learn if a combination of morning blue light and evening red light therapy can improve sleep quality in adults with subclinical sleep complaints (non-diagnosed difficulty initiating or maintaining sleep).

The main questions it aims to answer are:

Does combined morning blue light and evening red light therapy reduce sleep onset latency (the time it takes to fall asleep) and improve sleep efficiency? Does this light therapy intervention improve subjective alertness upon awakening? Researchers will compare each participant's objective and subjective sleep data during a 7-day baseline (habitual routine) with their data during a 7-day light therapy intervention to assess whether light therapy improves sleep and daytime alertness.

Conditions

  • Sleep

Interventions

OTHER

LED portable light therapy bulb

Unlike studies that use only bright white light or single-wavelength blue light, this intervention combines morning short-wavelength (blue) light with evening long-wavelength (red) light. This study specifically targets individuals with "subclinical" sleep complaints-those with a Pittsburgh Sleep Quality Index (PSQI) score \>1-rather than patients already diagnosed with clinical insomnia or Circadian Rhythm Sleep Disorders. The protocol requires a precise 4-hour daily total exposure (2 hours in the morning and 2 hours in the evening), which is more intensive than many standard 30-minute light box protocols. This is an at-home intervention where participants use portable lamp mounting options to integrate 4 hours of therapy into their regular daily activities, rather than receiving treatment in a controlled laboratory setting.

Sponsors & Collaborators

  • Colorado State University

    lead OTHER

Principal Investigators

  • Josiane L Broussard, PhD · Colorado State University

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2024-07-09
Primary Completion
2025-07-07
Completion
2025-07-07

Countries

  • United States

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07465250 on ClinicalTrials.gov