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. Th… ...

Their conclusions are detailed in the article "Light-emitting Diodes Can Replace High-pressure Sodium Lighting for Cut Gerbera Production," found in HortScience.

Their conclusions are detailed in the article "Light-emitting Diodes Can Replace High-pressure Sodium Lighting for Cut Gerbera Production", found in HortScience.

Grand Rapids will replace 665 high-pressure sodium lights in the Government Center ramp - beneath City Hall and the Kent County administration building - with more-efficient LED lights.