Daylight is so much more than just a source of light. It plays a crucial role in our daily functioning, our health and our well-being. From regulating our internal clock to improving our mental health, daylight has a powerful influence on our bodies and minds. But what makes daylight so important, and why can’t we live without it? In this blog, you’ll discover everything about the impact of daylight on our health, our internal clock and how to make sure you get the most out of it.
What is daylight and why do we need it?
Daylight is the natural light that comes from the sun. It differs greatly from artificial light, not only in intensity but also in composition. Daylight is measured in lux , a unit of light intensity. While a sunny day outside can reach up to 100,000 lux, the light intensity indoors is often no more than 500 lux.
Why is this difference important? Our bodies are programmed to respond to daylight. Its presence or absence affects our sleep, energy, and mood. Without adequate daylight exposure, we can feel exhausted, sleep worse, and experience a lower quality of life.
The connection between daylight and our internal clock
What is the internal clock?
Our internal clock, or circadian rhythm , is a biological rhythm that regulates all of our bodily processes within a 24-hour cycle. It determines when we feel awake or sleepy, regulates our body temperature, hormone production, and even our appetite.
Daylight is an important trigger for this rhythm. As soon as we are exposed to light in the morning, our body sends signals to stop the production of melatonin (the hormone that makes us sleepy). At the same time, cortisol , the hormone that makes us awake and alert, is produced.
What happens without enough daylight?
A lack of daylight can seriously disrupt our circadian rhythm. For example:
- Difficulty falling asleep or getting up in the morning.
- Decreased energy during the day.
- Higher risks of conditions such as depression and diabetes.
People who work in dark rooms or spend a lot of time indoors often experience these effects the most.
Health Benefits of Daylight
1. Boost for vitamin D production
Sunlight is the most important source of vitamin D, an essential nutrient that contributes to strong bones, a healthy immune system and a well-functioning heart. A vitamin D deficiency can lead to health problems such as osteoporosis and a weak immune system.
2. Improved mental health
Daylight stimulates the production of serotonin, a hormone that improves mood and reduces stress. This explains why a sunny day often makes us happier and why a lack of daylight in winter can lead to seasonal affective disorder (SAD).
3. Supporting a healthy sleep pattern
Daylight helps regulate our sleep-wake cycle by signaling the right difference between day and night. People who receive a lot of light during the day sleep better and deeper at night.
4. Benefits for the eyes
Natural light helps with the development and health of our eyes. It reduces the risk of myopia, especially in children, and prevents digital eye strain from too much time in front of screens.
How can you integrate more daylight into your life?
1. Start your day outdoors
A 10-minute morning walk can do wonders for your energy and mood. It's an easy way to properly synchronize your internal clock.
2. Work near a window
Position your desk so that you get as much natural light as possible during the day. If this is not possible, consider using daylight lamps.
3. Plan activities outside
Whether it's exercising, walking or taking a lunch break in the fresh air, any activity in daylight helps you feel better. Even on cloudy days, the light outside is much stronger than indoors.
4. Bring daylight into your home
Use light colours on walls and furniture to reflect daylight. Consider adding mirrors to diffuse light and keep curtains open when possible.
Conclusion
Daylight is one of the most powerful natural resources for our health and well-being. It influences our internal clock, helps us sleep better and supports our physical and mental health. By consciously spending more time in daylight and adjusting your environment, you can give yourself a huge health boost.
