Published Feb 9, 2024
In the beginning God said, “Let there be light”….
Today, we delve into the profound importance of light in our lives. From the dawn of history, light has been intertwined with human existence, shaping our biology, psychology, and overall well-being.
Recent research has shed light on the significance of exposure to low-angle sunlight in the morning and evening for our circadian rhythm. Our bodies have an internal clock that regulates our sleep-wake cycle, known as the circadian rhythm. This rhythm is deeply influenced by light, particularly natural light. It is very important to get exposure to the evening and morning light with it array of oranges, pinks and purples. Our eyes are tuned to find those colors and thus help synchronize our internal clocks, promoting better sleep quality and overall health.
To optimize our exposure to natural light, experts recommend spending about 10 minutes or so in the morning and evening soaking in the low-angle sunlight with its characteristic orange-pink hue. This specific type of sunlight provides the ideal wavelength to synchronize our circadian rhythm and boost mood-enhancing serotonin levels. Although goes without saying just don’t stare directly into the sun.
Also, one study published in the Journal of Clinical Sleep Medicine [1] demonstrated that individuals exposed to more natural light during the day experienced improved sleep quality and duration compared to those with limited exposure. Furthermore, researchers have found that aligning our sleep-wake cycle with natural light patterns can lead to enhanced alertness and cognitive function throughout the day.
Beyond its impact on our sleep patterns, light also plays a crucial role in regulating our mood. Sunlight exposure triggers the release of serotonin, a neurotransmitter associated with feelings of happiness and well-being. Conversely, lack of sunlight, particularly during the winter months, has been linked to seasonal affective disorder (SAD), a type of depression that occurs cyclically with the changing seasons.
In addition to the benefits of light, it’s essential to recognize the importance of darkness, particularly at night, for the production of melatonin, often referred to as the sleep hormone. Melatonin is crucial for regulating our sleep-wake cycle and promoting restful sleep. Exposure to artificial light, especially blue light emitted by electronic devices, in the evening can suppress melatonin production, disrupting our sleep patterns.
Moreover, beyond its effects on sleep and mood, light also offers numerous physical health benefits. Sunlight exposure is essential for the production of vitamin D, which plays a vital role in maintaining healthy bones, supporting the immune system, and reducing the risk of chronic diseases such as osteoporosis and certain types of cancer.
So, the ancient Biblical wisdom of “Let there be light” holds profound truth in our modern understanding of health and well-being. By embracing the natural rhythms of light and darkness, and ensuring adequate exposure to sunlight, we can optimize our sleep, mood, and physical health.
References:
Wright Jr KP, McHill AW, Birks BR, et al. Entrainment of the human circadian clock to the natural light-dark cycle. J Clin Sleep Med. 2013;9(5):423-433. doi:10.5664/jcsm.2704
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