Light at the end of the tunnel? new trial tests bright light for bipolar depression
NCT ID NCT05357313
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study tests whether sitting under a bright light for 30 minutes each day for six weeks can improve mood in people with bipolar depression who also tend to be evening types. Seventy adults will be randomly assigned to either the bright light or a placebo device. The goal is to see if this simple, drug-free approach can reduce depressive symptoms.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
bright light therapy
What this could lead to
If it works, this could offer a simple, drug-free way to ease depression in people with bipolar disorder who tend to be night owls.
What could go wrong
This is a small, early-stage trial with only 70 people. The placebo effect is strong in depression studies, and results may not apply to everyone with bipolar disorder.
Disclaimer
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This is a summary of
the original study
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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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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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The Chinese University of Hong Kong
Hong Kong, Hong Kong