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Bright morning light could sharpen Students' minds and moods

NCT ID NCT07685262

Symptom relief Sponsor: The Hong Kong Polytechnic University Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jul 06, 2026 · Last updated Jul 07, 2026 · Updated 1 time

Summary

This study tests whether a week of morning bright light therapy improves sleep, alertness, mood, and thinking in healthy university students. Participants use a 10,000-lux light box for 30 minutes each morning for one week, and their results are compared to a week with usual lighting. Sleep is tracked with a Fitbit and diary, and participants complete daily mood and thinking tasks. The goal is to see if a simple morning light routine can help students who often have irregular sleep and limited daylight exposure.

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 (10,000 lux light box)
What this could lead to
If it works, this could point toward a simple, drug-free way for students to improve sleep regularity, daytime alertness, and mood.
What could go wrong
This is a small, early-stage trial in healthy volunteers, so results may not apply to people with sleep disorders. The effect may be modest or not last beyond the study week.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 153 people

The number the study aims to enrol. It can still change while the study runs.

Started

May 2024

Expected to finish

Jun 2028

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Enrolled university student * Aged 18 years or older * Generally healthy, with no diagnosed sleep disorder (sleep quality screened using the Pittsburgh Sleep Quality Index) * Residing in shared student housing Exclusion Criteria: * Diagnosed insomnia or other diagnosed sleep disorder * Other medical, psychiatric, or neurological condition that could affect sleep, mood, or cognition

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Conditions

The condition(s) this trial relates to.

circadian rhythm sleep disorder cognitive disorder Disorders of Excessive Somnolence mood disorder sleep disorder

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Circadian rhythm Cognition Daytime sleepiness Healthy volunteers MOOD Sleep

How to take part

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  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • The Hong Kong Polytechnic University

    RECRUITING

    Hung Hom, Hong Kong

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