Circadian Health Glossary
Light Pollution
Light pollution refers to the excessive or inappropriate use of artificial light, which disrupts natural darkness during nighttime. This environmental issue can interfere with circadian rhythms, affecting sleep, health, and ecosystems.
Types of Light Pollution
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Glare: Excessive brightness that causes visual discomfort.
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Skyglow: The brightening of the night sky in urban areas, reducing visibility of stars.
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Light Trespass: Unwanted or intrusive light spilling into homes or natural areas.
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Clutter: Overcrowded or excessive use of artificial lights, common in urban spaces.
How Does Light Pollution Affect Circadian Health?
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Melatonin Suppression: Artificial light, especially blue light, reduces melatonin production, delaying sleep onset.
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Circadian Disruption: Constant exposure to artificial light can misalign the body’s internal clock, leading to sleep and metabolic disorders.
Ways to Reduce Light Pollution
- Use warm-colored lights at night.
- Use blackout curtains to block outdoor light, ideal for shift workers sleeping during the day or anyone avoiding early summer sunrises.
- Limit use of screens and dim indoor lighting in the evening.
Understanding and addressing light pollution is essential for promoting better circadian health and protecting the natural balance of ecosystems.