Measurements

Leibniz-Institute of Astrophysics, Potsdam

http://verlustdernacht.aip.de/cgi-bin/index.cgi

University of Vienna, Department of Astrophysics

http://astro.univie.ac.at/en/institute/light-pollution/

Citizen Science Projects

BuioMetria partecipativa
Dark Sky Meter
Globe at Night
Night Sky and Insects (FR)