Over the past decade, scientists found, the #night #sky has become nearly 10 percent #brighter each year because of artificial lights, mainly #LEDs emitting too much glare. Streetlights are part of the problem, as are sources such as illuminated billboards and stadium lights.
Those same outdoor lights are also affecting our health. Common types of LED lights contain higher proportions of bluer wavelengths, which can affect people’s nighttime patterns. They disrupt our circadian rhythms, lower the performance of our immune systems and increase the occurrence of certain diseases.
https://www.washingtonpost.com/climate-environment/interactive/2023/glaring-problem-how-led-lights-worsen-light-pollution/