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  • Bob Thomson

Illuminate Wellness: How Proper Lighting Nurtures a Healthy Circadian Rhythm

Updated: Mar 1

Lighting isn't just about illumination; it's a powerful tool that influences our internal clock, impacting sleep, mood, and overall well-being. Creating a lighting environment that mirrors the natural ebb and flow of daylight is crucial for nurturing a healthy circadian rhythm. Let's delve into the significance of proper lighting and its profound effects on our body's internal clock.

Understanding the Circadian Rhythm

Natural Rhythm: The circadian rhythm, a 24-hour cycle influencing sleep-wake patterns and hormone regulation, is highlighted by Roenneberg and Merrow (2016) as crucial for overall well-being. It's primarily influenced by exposure to light and darkness, regulating various physiological processes.

Impact of Light: Natural daylight, emphasized by Stothard et al. (2017), plays a pivotal role in synchronizing our internal clock, signaling wakefulness or rest. Light exposure helps regulate the body's internal clock, influencing when to be alert and when to wind down.

The Importance of Proper Lighting

Morning Boost: Exposure to bright, blue-enriched light in the morning suppresses melatonin production, promoting alertness and energy, as discussed by Vandewalle et al. (2013).

Evening Transition: Transitioning to softer, warmer light in the evening encourages relaxation and the release of sleep-inducing hormones like melatonin, according to Chang et al. (2015).

Tips for Implementing Proper Lighting

Morning Sunshine: Spend time outdoors or open curtains in the morning to absorb natural daylight, signaling wakefulness to your body, as suggested by Czeisler et al. (1999).

Blue-Enriched Light: Use lights with higher color temperatures (5000K to 6500K) in the morning to mimic daylight's energizing effects, as discussed by Welsh et al. (2010).

Dim, Warm Light: Transition to warmer, dimmer lighting (2700K to 3000K) in the evening to signal bedtime and facilitate relaxation, recommended by Czeisler et al. (1999).

Harnessing Technology for Circadian Health

Smart Lighting Solutions: Programmable lighting systems simulate natural daylight changes throughout the day, supporting a healthy circadian rhythm, according to Vandewalle et al. (2013).

Dimmable Fixtures: Use dimmable lighting to adjust brightness levels and create a soothing ambiance during the evening, as suggested by Chang et al. (2015).

Conclusion: Lighting for Well-being

Proper lighting isn't just about brightness; it's about nurturing our body's natural rhythm. By embracing lighting that aligns with the natural progression of daylight, we can support our circadian rhythm, improve sleep quality, boost energy levels, and promote overall wellness. Let lighting be your ally in fostering a balanced and harmonious relationship between the natural light of the day and the restful darkness of the night, enhancing your well-being every step of the way.


  • Roenneberg, T., & Merrow, M. (2016). The circadian clock and human health. Current Biology, 26(10), R432-R443.

  • Stothard, E. R., et al. (2017). Circadian entrainment to the natural light-dark cycle across seasons and the weekend. Current Biology, 27(4), 508-513.

  • Vandewalle, G., et al. (2013). Light as a modulator of cognitive brain function. Trends in Cognitive Sciences, 17(11), 642-654.

  • Chang, A. M., et al. (2015). Evening use of light-emitting eReaders negatively affects sleep, circadian timing, and next-morning alertness. Proceedings of the National Academy of Sciences, 112(4), 1232-1237).

  • Welsh, D. K., et al. (2010). Suprachiasmatic nucleus: cell autonomy and network properties. Annual Review of Physiology, 72, 551–577.

  • Czeisler, C. A., et al. (1999). Stability, precision, and near-24-hour period of the human circadian pacemaker. Science, 284(5423), 2177-2181).

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