Exposure to Light Pollution Harms Your Health
Artificial light at night doesn’t just block out the stars, it harms us too. Research shows that light pollution increases risks for obesity, depression, sleep disorders, diabetes, breast cancer, and more. As the American Medical Association noted:
“Many species (including humans) need darkness to survive and thrive.”
How Light Pollution Disrupts Our Bodies
Circadian Rhythm and Melatonin
Our bodies follow a natural sleep-wake cycle called the circadian rhythm. Darkness triggers the production of melatonin, a hormone that induces sleep, strengthens the immune system, and supports vital organs. Artificial light at night suppresses melatonin, leaving us more vulnerable to illness.
Blue Light Is the Most Harmful
Blue-rich light, from LED streetlights, TVs, phones, and laptops is especially disruptive. It brightens the night sky more than other colours and interferes with sleep and health. Even energy-efficient lighting, if too blue, comes at a hidden cost to human wellbeing.
Glare Is a Safety Hazard
Poorly shielded lighting doesn’t just waste energy; it creates glare that reduces vision and contrast, making it harder to see at night. This puts everyone at risk, especially older adults.
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Image: Wikipedia, shows three different white lights with blue, yellow and orange tints to them. The orange 2700K light is the healthiest and most environmentally positive type to chose.
There’s Hope for Healthier Nights
Unlike other pollutants, light pollution is reversible. By choosing warmer light sources (2700K–3000K or lower), shielding outdoor fixtures, and using apps that reduce screen brightness and blue light at night, you can protect your sleep, your health, and your loved ones.
Every time we bring back a little darkness, we bring back balance to our bodies.
Start at home – take simple steps today to make your nights healthier.
