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 ...

FirstEnergy Corp.’s FE unit Penelec converted more than 2,300 high-pressure sodium streetlights into smart LED streetlamps in downtown Erie and along the Bayfront during the period between November ...

The City of Lathrop is looking to replace its existing High-Pressure Sodium streetlights to that of an energy-efficient light emitting diode or LED fixtures.

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 ...

A new study has revealed the chemical bonding behind sodium's high-pressure transformation from shiny metal to transparent insulator. Travel deep enough below Earth's surface or inside the center of ...

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