Benefits and Risks of Artificial Light Exposure: Characterisation of Effects on Alertness, Sleep, Cognitive Performance, Mood and Biological Rhythms (LumEnColor)

  • End date
    May 1, 2024
  • participants needed
  • sponsor
    University Hospital, Strasbourg, France
Updated on 24 August 2023
Accepts healthy volunteers


The purpose of this project is to study the influence of light on sleep, wakefulness, EEG activity and cognitive performances.

Condition Human Sleep and Chronobiology
Treatment Red light, Green light, polychromatic light
Clinical Study IdentifierNCT05232383
SponsorUniversity Hospital, Strasbourg, France
Last Modified on24 August 2023


Yes No Not Sure

Inclusion Criteria

Male or female
Aged 18 to 40 years
With a hint of Bodymass index (BMI) between 17 and 30 kg.m - 2
healthy subject determined by a clinical examination, a psychological interview, a blood test, a urine analysis
Subject with a score<6 questionnaire PSQI ("Sleep Questionnaire Pittsburgh")
Subject agreeing to maintain a regular sleep/wake rhythm during the study
Subject agreeing to refrain from caffeine, nicotine, alcohol, psychotropic drugs, cannabis or other drugs, during the study
Signed informed consent
Subjectaffiliated to a social protection scheme

Exclusion Criteria

somatic diseases: cardiovascular, respiratory, gastrointestinal, hematopoietic, Visual
immune system diseases
kidneys and urinary tract diseases
endocrine and metabolic diseases
neurological diseases
infectious diseases
thrombocytopenia or other malfunction of blood platelets
Subject with risk of thrombosis, including subject with a history of phlebitis, smoker under oral contraceptive
Subject with an addiction to caffeine, nicotine, alcohol, psychotropic drugs, cannabis, or any other drug
Subject treatment contraindicated or inadvisable in combination with heparin
blood donation in the previous 3 months before the inclusion
Participation in other clinical trials
Work by shifts in the year preceding the inclusion
Trans-meridian travel (> 2 time zones) in the month previous the inclusion
Impossibility to give enlightened information (subject in an emergency situation, understanding difficulties,...)
Subject under safeguard of justice
Subject under tutorship or curatorship
Pregnancy (women of childbearing age)
Diet incompatible with the study's snack choices
Clear my responses

How to participate?

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What happens next?
  • You can expect the study team to contact you via email or phone in the next few days.
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Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

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If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

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Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

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