Alliant Energy had been studying replacing the high-pressure sodium light bulb casting a yellowish-orange glow on downtowns and residential streets around Iowa with a more efficient, brighter white ...

CEDAR RAPIDS - Alliant Energy has begun to replace the first of about 12, its high-pressure sodium streetlights with LED ones here and in 58 other communities in its Cedar Rapids metro service area.

Wickliffe is embarking on an ambitious city-wide project which will see all of the city’s streetlights replaced with more energy-efficient LED lighting. The nearly 1,600 streetlights within the city’s ...

Eco-friendly light-emitting diode (LED) bulbs used in streetlamps produce more light pollution and are killing off insects, a new study shows. Researchers in England found LED streetlights kill off ...