Cities have long equated brightness with safety. From sodium vapour lamps to high-efficiency LEDs, the evolution of urban ...

Denmark is testing a different kind of streetlight, one that changes colour rather than brightness. In a suburb near ...

A couple admires the artwork “Aura,” a mirrored sensor that registers facial expressions and creates bursts of colorful light, in Copenhagen, Denmark on January 31, 2025. (Lasse Sørensen/Courthouse ...

Over the years, several studies have indicated that white streetlights can pose problems for some species of bats ...