Gladsaxe replaced its standard white LED fixtures with specialized red LED streetlights along Frederiksborgvej. The installation was strategically placed near a known bat colony to mitigate the impact of artificial light on the nocturnal ecosystem. https://dailygalaxy.com/2026/03/denmark-switched-to-red-streetlights-gladsaxe-bats/
Denmark Just Switched to Red Streetlights to Solve an Urban Crisis Most Modern Cities Still Ignore

Drivers in Denmark are facing a surreal sight as a primary corridor is suddenly bathed in an intense, unearthly red light.

The Daily Galaxy - Great Discoveries Channel