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In 1840, British scientist Warren de la Rue enclosed a coiled platinum filament in a vacuum tube and passed an electric current through it.The design was based on the concept that the high melting point of platinum would allow it to operate at high temperatures and that the evacuated chamber would contain fewer gas molecules to react with the platinum, improving its longevity.
He stated that he could "read a book at a distance of one and a half feet".
However, having perfected the device to his own satisfaction, he turned to the problem of wireless telegraphy and did not develop the electric light any further.
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Incandescent bulbs typically have short lifetimes compared with other types of lighting; around 1,000 hours for home light bulbs versus typically 10,000 hours for compact fluorescents and 30,000 hours for lighting LEDs.
An incandescent light bulb, incandescent lamp or incandescent light globe is an electric light with a wire filament heated to such a high temperature that it glows with visible light (incandescence).
The filament is protected from oxidation with a glass or fused quartz bulb that is filled with inert gas or a vacuum.
In a halogen lamp, filament evaporation is slowed by a chemical process that redeposits metal vapor onto the filament, thereby extending its life.
The light bulb is supplied with electric current by feed-through terminals or wires embedded in the glass.
Historian Thomas Hughes has attributed Edison's success to his development of an entire, integrated system of electric lighting.Tags: Adult Dating, affair dating, sex dating