Can a light box help Parkinson's patients sleep better?
NCT ID NCT04291014
First seen Jun 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study tested different doses of light therapy to see which works best for improving sleep in people with Parkinson's disease. 203 participants used either bright-white or dim-red light boxes at different times of day. The goal was to find the most effective dose to ease sleep problems and fatigue.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
SunRay light boxes (light therapy device)
What this could lead to
If it works, this could point toward a simple, non-drug way to improve sleep and reduce fatigue in Parkinson's disease.
What could go wrong
This is a completed dose-finding study, not a proof of effectiveness. The results may not show clear benefit, and light therapy might not work for everyone or could be inconvenient to use daily.
Disclaimer
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This is a summary of
the original study
.
Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Locations
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Barrow Neurological Institute
Phoenix, Arizona, 85013, United States
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Beth Israel Deaconess Medical Center
Boston, Massachusetts, 02215, United States
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Massachusetts General Hospital
Boston, Massachusetts, 02114, United States
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Mount Sinai - Icahn School of Medicine
New York, New York, 10029, United States
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Northwestern University
Chicago, Illinois, 60611, United States
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Ohio State University
Columbus, Ohio, 43221, United States
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SUNY Stonybrook
Stony Brook, New York, 11794, United States
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SUNY Upstate
Syracuse, New York, 13210, United States
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UC Davis
Sacramento, California, 95817, United States
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UC Irvine
Irvine, California, 92697, United States
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University of Alabama
Birmingham, Alabama, 35233, United States
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University of Cincinnati
Cincinnati, Ohio, 45219, United States
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University of Iowa
Iowa City, Iowa, 52242, United States
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University of Miami
Miami, Florida, 33136, United States
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University of Michigan
Ann Arbor, Michigan, 48109, United States
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University of Pennsylvania
Philadelphia, Pennsylvania, 19107, United States
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University of Pittsburgh
Pittsburgh, Pennsylvania, 15213, United States
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University of Rochester
Rochester, New York, 14642, United States
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University of Utah
Salt Lake City, Utah, 84132, United States
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University of Virginia
Charlottesville, Virginia, 22903, United States
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Vanderbilt University
Nashville, Tennessee, 37232, United States
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Wake Forest University
Winston-Salem, North Carolina, 27104, United States
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Washington University in St. Louis
St Louis, Missouri, 63110, United States
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Weill Cornell
New York, New York, 10021, United States
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Yale University
Fairfield, Connecticut, 06824, United States