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Updated: Jun 4, 2025

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The role of light exposure in infant circadian rhythm establishment: A scoping review perspective

Ee Yin Kok1, Satvinder Kaur2, Nurul Husna Mohd Shukri3

  • 1Faculty of Applied Sciences, UCSI University, Cheras, Kuala Lumpur, Malaysia.

European Journal of Pediatrics
|December 31, 2024
PubMed

Insights

Cycled lighting exposure helps entrain infant circadian rhythms, improving sleep and wakefulness for better growth. Implementing cycled lighting in homes and healthcare settings is recommended for infant development.

Area of Science:

  • Chronobiology
  • Developmental Pediatrics
  • Environmental Health

Background:

  • Infant circadian rhythm development is vital for growth and well-being.
  • Environmental light exposure is a key factor in circadian rhythm entrainment.
  • Understanding light's role is crucial for optimizing infant development.

Purpose of the Study:

  • To conduct a scoping review of literature on light exposure and infant circadian rhythm development.
  • To evaluate the evidence linking light exposure to the entrainment of infant circadian rhythms.
  • To identify best practices for light exposure in infants.

Main Methods:

  • Scoping review adhering to PRISMA-ScR guidelines.
  • Searched six databases (PubMed, Cochrane, Science Direct, Google Scholar, Taylor & Francis, Wiley) up to August 2024.
  • Included reviews, narrative, observational, and experimental studies from 2012-2024.

Main Results:

  • 25 studies were included: 3 observational, 6 experimental, 16 reviews.
  • Evidence supports cycled lighting aligning with the 24-hour light-dark cycle for circadian entrainment.
  • Cycled lighting enhances nighttime sleep and daytime alertness, supporting optimal growth.

Conclusions:

  • Cycled lighting is beneficial for infant circadian rhythm development.
  • Implementation in healthcare and home settings is recommended.
  • Promotes improved sleep-wake cycles, crucial for infant growth and development.

Keywords:
Circadian rhythmEnvironmental lightInfant growthNeonatalScoping review

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