Citizen science illuminates the nature of city lights (nature.com)

Very cool and hopefully will help influence policy in the future. (Here’s [not] looking at you, insanely overbright LED shop window ads blasting well into the late night in my city)

Looks like anyone can get involved here https://lichter.nachtlicht-buehne.de/

> We find that in German city centers, more total light sources are used for advertising and aesthetic purposes than for street lighting.

I hope we get harsher light-pollution regulations for ads.