At a glance

ClinicalIndex Comparison Record

N/ACompleted· 27 enrolled

Drug / intervention

Dim light condition +2 moreother

Likely dose

Not stated in record

Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT05483296

NCT05483296N/ACompleted

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Modulating Evening Responses to Light by Afternoon Light Exposure in Adolescents

University Psychiatric Clinics Basel·interventional·Posted Aug 2, 2022·Updated Mar 30, 2025

In Brief

A clinical study evaluating Dim light condition, Moderate light condition, and 1 other intervention for Healthy and 2 related conditions. Completed, enrolled 27 participants across 1 site.

Detailed Summary

Many teenagers are familiar with this: on school days, they have to get up early; during the day, they hardly get any light exposure; in the evening, they go to bed late - and are then tired at school the next day! Around the world, teenagers are sleep deprived, with studies suggesting that almost half (\~45%) suffer from inadequate sleep. Previous investigations have shown that people's sleep-wake rhythm is related to the light conditions that they are exposed to during the day and at night. However, little is known about how different light levels in the afternoon can modulate teenagers' sleep and their bodily responses to light in the late evening. Therefore, the investigators aim to study which lighting conditions have a favourable effect on these aspects and how the potentially harmful effects of light at night can be prevented.

Study Details

Study Typeinterventional

Allocation--

Masking--

Primary Purpose--

ConditionsHealthy, Teenager, Healthy Lifestyle

CountriesSwitzerland

Collaborators--

Timeline

N/ACompletedFinished

2023202420252026

First PostedAug 2022

Enrollment StartSep 2022

Primary CompletionJun 2023

TodayJul 2026

First PostedAug 2, 2022

Enrollment StartSep 22, 2022

Primary CompletionJun 20, 2023

TodayJul 2, 2026

Enrollment to primary: 9 monthsPosted 3.9 years ago

Interventions

Dim light conditionother

During the "Dim" light condition, the four-hour afternoon light exposure at the participants' eye level will be dim (\<5 lx melanopic EDI). In the 4.5-hour evening light exposure, this will constitute a light intensity of \~100 lx melanopic EDI at the participants' eye level.

Moderate light conditionother

During the "Moderate" light condition, the four-hour afternoon light exposure at the participants' eye level will be dim (\~100 lx melanopic EDI). In the 4.5-hour evening light exposure, this will constitute a light intensity of \~100 lx melanopic EDI at the participants' eye level.

Bright light conditionother

During the "Bright" light condition, the four-hour afternoon light exposure at the participants' eye level will be dim (\>1000 lx melanopic EDI). In the 4.5-hour evening light exposure, this will constitute a light intensity of \~100 lx melanopic EDI at the participants' eye level.