The project "Improvement of night quality" carried out by the Ballons des Vosges Regional Natural Park responds to the national and regional strategic issues of biodiversity, the SRADDET and the charter of the Park. This project is structured around three modules spread between 2023 and 2026: knowledge and planning of a black grid throughout the Park, implementation and evaluation of solutions on pilot sites, communication and enhancement of actions. For all modules, public, private and associative actors as well as citizens will be consulted. The nocturnal issues, still little aware despite their importance, deserve to be highlighted and appropriated by all to live better at night and protect and restore the ecological continuities of this mountain territory with rich and fragile landscapes and biodiversity.