A combination of snow and cloud cover can make light pollution in the sky over 180 times brighter, potentially affecting the sleep cycles of nocturnal animals
Source:
https://www.newscientist.com/article/2212735-snowglow-can-cause-the-night-sky-to-be-twice-as-bright-as-a-full-moon/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home