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2. Incandescent light bulb - Wikipedia

   en.wikipedia.org/wiki/Incandescent_light_bulb

   A 230-volt incandescent light bulb with a medium-sized E27 (Edison 27 mm) male screw base. The filament is visible as the mostly horizontal line between the vertical supply wires. A scanning electron microscope image of the tungsten filament of an incandescent light bulb Elaborate light in Denver, Colorado

3. Alexander Lodygin - Wikipedia

   en.wikipedia.org/wiki/Alexander_Lodygin

   1890s: He invented a few types of filament lamps with metallic filaments; some say he was the first scientist to use a tungsten filament. He got a patent for lamps with tungsten filaments (US Patent No. 575,002 Illuminant for Incandescent Lamps , Application on 4 January 1893) [ 1 ] and sold it to General Electric (1906), [ citation needed ...

4. Edison light bulb - Wikipedia

   en.wikipedia.org/wiki/Edison_light_bulb

   Edison light bulb enclosed in a cage. Edison light bulbs, also known as filament light bulbs and retroactively referred to as antique light bulbs or vintage light bulbs, are either carbon- or early tungsten-filament incandescent light bulbs, or modern bulbs that reproduce their appearance.

5. Centennial Light - Wikipedia

   en.wikipedia.org/wiki/Centennial_Light

   The bulb was made by hand, using a carbon filament (of greater thickness and strength than the tungsten filaments used in most modern lightbulbs) along with brass and glass components of high quality. The low wattage (originally 60 watts, now approximately four) and high nitrogen atmosphere inside the bulb have also contributed to its longevity.

6. Tungsram - Wikipedia

   en.wikipedia.org/wiki/Tungsram

   The name "Tungsram" is a portmanteau of tungsten (/ ˈ t ʌ ŋ s t ən / TUNG-stən) and wolfram (/ ˈ w ʊ l f r əm / WUUL-frəm), the two common names of the metal used for making light bulb filaments. Before becoming nationalized by the Communist government in 1945, the company was the world's third largest manufacturer of light bulbs and ...

7. Nernst lamp - Wikipedia

   en.wikipedia.org/wiki/Nernst_lamp

   The lamps were quite successfully marketed for a time, although they eventually lost out to the more efficient tungsten-filament incandescent light bulb. One disadvantage of the Nernst design was that the ceramic rod was not electrically conductive at room temperature, so the lamps needed a separate heater filament to heat the ceramic ...