The bulb itself has four terminals, two for the filament, and is filled with neon gas and metallic sodium. When the current is switched on, an arc light springs from the filament, takes on a red ...

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 ...

SUNY ESF will collect and recycle all fluorescent, mercury vapor, metal halide and high-pressure sodium light bulbs used on campus. While many of these bulbs may not actually be hazardous, they will ...

With a bewildering array of choices for new energy efficient light bulbs, this guide will help you find the right one for the right place ...

Traffic Technician for the Traffic Control and Engineering department for the City of Allentown, Brian Sigoda of Allentown changes the high pressure sodium light bulb in a lamppost on 6th Street ...

The energy crunch of the 1970s ushered in the energy-efficient light. Its even more-efficient cousin, the low pressure sodium vapor bulb, was never popular in the U.S. Its monochromatic light ...

The Finally Light Bulb promises superior light quality, but the numbers don't support the claims.

When the light-bulb industry labels its 5,000-kelvin bulbs “daylight,” it’s trying to helpfully indicate that you’re getting a blue light—never mind the fact that a dinky white light ...

The government’s light bulb ban is far from Schumpeter’s model of creative destruction. Simply put, it is economic ignorance.

FACT: If every American home replaced just one light bulb with an Energy Star qualified bulb, we would save enough energy to light more than 3 million homes for a year, more than $600 million in ...