Nights in the German federal states (Bundesländer) have been getting increasingly bright—but not everywhere at the same rate, and with one peculiar exemption: Light emissions from Thuringia decreased between 2012 and 2017. This is the result of a recent study by scientists Chris Kyba and Theres Küster from the GFZ German Research Centre for Geosciences, together with Helga Kuechly from Luftbild—Umwelt—Planung, Potsdam. Kyba and colleagues have published the study in the International Journal of Sustainable Lighting IJSL. This week, they updated the maps by including the 2017 data from a satellite-born instrument.