The moon's phases will determine how much light the building should actually use. (via hakaimagazine)
Camilla Rathsach walked along the lichen-covered sand, heading out from the lone village on Denmark’s remote Anholt island—a spot of land just a few kilometers wide in the middle of the Kattegat Strait, which separates the Danish mainland from Sweden. As Anholt Town’s 45 streetlights receded into the distance, moonlit shadows reached out to embrace the dunes. Rathsach looked up, admiring the Milky Way stretching across the sky. Thousands of stars shone down. “It’s just amazing,” she says.
This dark-sky moment was one of many Rathsach experienced while visiting the island in 2020 for work on her master’s thesis on balancing the need for outdoor lighting and darkness. Having grown up in urban areas, Rathsach wasn’t used to how bright moonlit nights could be. And after speaking with the island’s residents, who value the dark sky deeply and navigate with little outdoor light, she realized that artificial lighting could be turned down at night depending on the moon’s phase.
At Aalborg University in Denmark, she worked with her graduate supervisor, Mette Hvass, to present a newfor Anholt’s church. Rathsach and Hvass picked the church for their project because it is a central meeting place for the community yet it currently has no outdoor lights. They thought lighting would make it easier for people to navigate but wanted to preserve the inviting ambiance of moonlight.
One of the guiding principles of designing sustainable lighting is to start with darkness, and add only the minimum amount of light required. Darkness and natural light sources are important to many species, and artificial light can be downright dangerous. “Lights can attract and disorient seabirds during their flights between colony and foraging sites at sea,” says Elena Maggi, an ecologist at the University of Pisa in Italy who is not involved in the project. Anholt’s beaches host a variety of breeding seabirds, including gulls and terns, and the island is a stopover for many migrating birds. The waters around the island are also home to seals, cod, herring, and seagrass.
France Dernières Nouvelles, France Actualités
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