To continue reading this content, please enable JavaScript in your browser settings and refresh this page. Think back to mixing primary-color paint in grade school ...

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 ...

The city recently completed two-years of work to install LED lights that are brighter, use less electricity and last 10 times longer.

Here’s how astronauts see us, or at least used to, back when we had astronauts: That’s set to change, at least a bit, as the city rolls out 16,300 ceramic metal halide street lights with the help of ...

Here’s a photo of a building’s night lighting after some retrofitting with LEDS. The Fire and Emergency Services building for the US Army’s Camp Humphreys (Pyeongtaek, Korea) replaced some of its ...

Clear your calendar the week of Oct. 8. We all have a big test to take. It’s the streetlight test. And, thankfully, it’s multiple choice. Do you like LED? Or ceramic metal halide? Or good old high ...

A problem too often overlooked is how the yellow-tinted light of high-pressure sodium (HPS) fixtures, which are typically found lighting streets and some parking lots, impacts your perception of the ...