And it will have taken about eight years in all to swap out all of those old-style streetlights across Mankato with high-efficiency LED lights. It was the summer of 2017 when a private electrician ...

Think back to mixing primary-color paint in grade school. Remember how mixing in yellow changes white, blue and red? Lighting is no exception. A problem too often overlooked is how the yellow-tinted ...

A University at Buffalo-led study analyzes the chemical binding behind sodium's transformation from shiny metal to transparent insulator under high pressure. Photo: Dnn87, Creative Commons Attribution ...

GRAND RAPIDS, MI -- Grand Rapids leaders have approved a $9.46 million contract to convert all city street lights to LED lights. City officials say the move will generate about $350,000 annually in ...

For almost two generations of Chicagoans, orange has been the color of night. High pressure sodium vapor lights, which create a glow reminiscent of a tire fire, have lit Chicago since the 1970s. They ...