HomeNewsShedding Light on Well-being: Breakthrough Studies Illuminate the Impact of LED Technology on Human Health

Shedding Light on Well-being: Breakthrough Studies Illuminate the Impact of LED Technology on Human Health


A research team, following in the footsteps of Seoul National University in Korea and Basel University in Europe, discovered that exposure to light with a spectrum similar to daylight, particularly those enriched in short wavelengths, positively influences crucial aspects of learning. This includes enhancements in working memory, the speed of cognitive processing, and accuracy in tests.


In 2019, a clinical trial spearheaded by the Division of Sleep and Circadian Disorders at Brigham and Women’s Hospital, affiliated with Harvard Medical School, commenced. This study, involving college-aged adults, demonstrated significant improvements in procedural learning, showcasing the effectiveness of the intervention.


The research team at Brigham and Women’s Hospital, led by Dr. Shadab Rahman, PhD MPH, an Assistant Professor of Medicine at Harvard Medical School, and including Drs. Leilah Grant, Melissa St. Hilaire, Steven Lockley, and others, conducted a notable study. Dr. Rahman emphasized that despite similar color temperature and brightness, light with varying spectra can differently impact non-visual responses, including circadian rhythms and cognitive functions. The team observed that under daylight-like spectrum lighting, young adults showed improvements in working memory, cognitive processing speed, procedural learning, and test accuracy compared to conventional-LED spectrum lighting. Dr. Rahman highlighted the significance of these findings, suggesting that they could guide indoor lighting choices to boost learning and memory functions in students. 


Recent years have seen a surge in studies exploring how light influences human biology. One notable research led by Prof. Christian Cajochen at the University of Basel, Switzerland, delved into the impact of light spectrum on sleep quality, visual comfort, mood, and daytime alertness. This study, titled ‘Effect of Daylight LED on Visual Comfort, Melatonin, Mood, Waking Performance, and Sleep,’ was published in the Journal of Lighting and Research Technology on March 24, 2019. Additionally, a 2018 experiment at Seoul National University College of Medicine revealed that using LED lighting significantly boosted vitality and alertness. This growing body of research underscores the profound effect of light on various aspects of human health and well-being.




In conclusion, the emerging research spearheaded by leading institutions like Brigham and Women’s Hospital, the University of Basel, and Seoul National University College of Medicine underscores the critical role of light enhancing human cognitive functions and overall well-being. These studies, exploring the effects of light on everything from learning and memory to sleep quality and alertness, are paving the way for a deeper understanding of our intricate relationship with light. They highlight the potential of thoughtfully designed lighting solutions in improving various aspects of daily life, aligning with our natural rhythms and promoting optimal health and productivity. This body of research is not just illuminating in a literal sense; it offers valuable insights for future advancements in lighting technologies and their applications in our everyday environments.

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