These defective purple-appearing street lights have made ... Due to the nature of the human eye and how it perceives blue-hued light, as objects get closer and come into focus, they become more ...

The thickness of that layer determines the warmth of the light ... a purple-hued street might seem fun, it could potentially be hazardous. Photoreceptors in our eyes are less attuned to blue ...

Traditionally, paved roads and pedestrian walkways have been illuminated by streetlights emitting a bright white, orange, or yellow glow. The aim is visibility, not aesthetics, and rarely will ...