Can bright light fix Parkinson's sleep problems?
NCT ID NCT04291014
First seen Mar 11, 2026 · Last updated May 16, 2026 · Updated 9 times
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 received either bright-white or dim-red light at different times of day. The goal was to find a safe, effective way to ease sleep troubles and fatigue.
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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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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
Conditions
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