This twisted wire illustrates how the filament in the Edison bulb is twisted, but at a micro-scale – when the light's wavelength matches the length of the twist, the lightwaves twirl as they go ...

According to the researchers, twisted light can be produced using the same technology as the 100-year-old Edison bulb (filament light bulb) technology.

Manufacturers and the government have sought new types of fixtures that would use less energy than Edison's pear-shaped glass bulb with a heated tungsten filament glowing inside.

Manufacturers and the government have sought new types of fixtures that would use less energy than Edison's pear-shaped glass bulb with a heated tungsten filament glowing inside.

The original Thomas Edison-patented bulbs — characterized by the burning-hot tungsten filament inside — cast a particular mood around a space.

But Edison didn't invent it. The modern light bulb has a glass bulb filled with an unreactive gas, such as argon. The filament is made of tungsten, which resists high temperatures magnificently.

BIDEN: "Why in God's name don't we teach history in history classes? A Black man invented the light bulb, not a white guy named Edison." — in Kenosha, Wisconsin, on Thursday.

Edison’s first practical light bulb used a carbonized cotton thread for that purpose; modern bulbs use tungsten filaments in an inert gas. But incandescents are not very efficient.

Halogen bulbs, a relative of incandescents containing a tungsten filament and halogen gas, enjoyed a vogue for decades and are still common for some applications, but have been phased out in ...