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Why do people become gloomy when they see too little daylight?

The link between lack of daylight and gloominess is complex and involves several physiological and psychological factors. Here are some reasons why people may become gloomy if they don't get enough daylight:

  1. Impact on biological clock: Daylight plays a crucial role in regulating our biological clock. This internal clock influences our sleep-wake cycle, hormonal balance and other bodily functions. A lack of sufficient daylight can lead to a disruption of this clock, which can negatively affect mood and energy levels.
  2. Reduced production of serotonin: Daylight stimulates the production of serotonin, a neurotransmitter known as the "happiness hormone." Serotonin deficiency is often associated with mood disorders, including depression. The lack of daylight can lead to a decrease in serotonin, which can cause gloominess.
  3. Melatonin production and sleep quality: Daylight suppresses the production of melatonin, a hormone involved in regulating sleep. Too little exposure to daylight, especially in the morning, can lead to disturbed sleep patterns and reduced sleep quality. Sleep problems, in turn, affect mood and general well-being.
  4. Seasonal affective disorder (SAD): Some people experience a form of depression that is seasonal, known as Seasonal Affective Disorder (SAD). It often occurs in the winter months when days are shorter and there is less natural light. Lack of exposure to daylight is associated with the development of SAD and associated gloominess.
  5. Impact on stress hormones: Daylight affects the regulation of stress hormones, such as cortisol. A lack of daylight can lead to an imbalance in these hormones, which can contribute to feelings of stress, anxiety and gloom.
  6. Psychological aspects: Psychologically, many people associate daylight with positive feelings and outdoor activities. In the absence of daylight, people can feel trapped, tired and less motivated, which can affect their overall mood.


It is important to note that the extent to which people are affected by a lack of daylight can vary individually. Some people are more sensitive to seasonal changes and associated changes in daylight, while others are less affected. Addressing this gloominess can often be improved by consciously incorporating more exposure to natural light into one's daily routine.




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