Manufacturers originally designed double-ended high-pressure sodium light bulbs so they would be compatible with double-ended metal halide fixtures. Traditional single-ended high-pressure sodium bulbs ...

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 ...

Bedding plant seedlings were grown at 21C under ambient solar light and supplemental lighting from either high-pressure sodium lamps or LED arrays with varying proportions of red:blue light. Seedling ...

Most talk glowingly about their neighborhoods’ new nighttime look. But some residents are taking a dim view of bright new streetlights that are popping up across Los Angeles. Energy-saving ...

NILES — The city will be replacing more than 260 street lights with LED fixtures in the coming months. Mayor Steve Mientkiewicz said the city has been replacing the old, high-pressure sodium bulbs ...

Elk Grove residents will notice something different about their street lights as the city retrofits nearly 10,000 lamps with energy-saving LEDs.The light emitting diode lights were selected after a ...

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 ...

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.

CULPEPER, Va. (WUSA9) -- Things may look a little brighter the next time you go to downtown Culpeper. Town officials tell us that crews have started replacing high-pressure sodium bulbs with more ...

The newly designed E40 LED lamp ranges from 40 watt to 120 watt, and is a good replacement for high bay lights using high pressure sodium, MH lamps and compact fluorescent lamps. The ANTS E40 LED lamp ...

On Wednesday, City Council signed off on its $160 million plan to change the color of Chicago, replacing its 270,000 high-pressure sodium lights, which give the city its, um, distinctive orange glow, ...