From sodium vapour lamps to high-efficiency LEDs, the evolution of urban lighting has focused on clarity, coverage and ...

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

Some things are so ubiquitous that it's easy to forget they're designed for a reason. With more than 300,000 traffic lights set up across the United States, it's easy to take how they look for granted ...