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light bulb
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The first electric light bulb, invented by Thomas Edison, had carbonized thread as its filament, and burned for 45 hours. Edison experimented with many other filaments, including red hair and a mixture of lamp black and tar.

Incandescent filament lamp, first demonstrated by Joseph Swan in the UK in 1878 and Thomas Edison in the USA in 1879. The present-day light bulb is a thin glass bulb filled with an inert mixture of nitrogen and argon gas. It contains a filament made of fine tungsten wire. When electricity is passed through the wire, it glows white hot, producing light.
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VAN NUYS -- Assemblyman Lloyd Levine -- who has proposed legalizing euthanasia, banning the incandescent light bulb and prohibiting cruelty to elephants -- has done it again.
LEVINE WANTS TO PUT TEETH IN PET POPULATION CONTROL by Daily News (Los Angeles, CA)
Public Energy Solutions and Con Edison are urging New Yorkers in selected zip codes and targeted load areas who are using 25 or more incandescent light bulbs in their buildings to sign up for free Compact Fluorescent Lamps (CFLs) through Operation Kill-A-Watt (table lamps are excluded).
Operation Kill-A-Watt to give away some green by Real Estate Weekly
Such structures may dramatically boost the efficiency of incandescent light bulbs and of thermophotovoltaic devices, which convert radiated heat into electricity, says research leader Shawn Yu Lin of the Sandia National Laboratories in Albuquerque, N.
Tiny tungsten beams lord over light. (Physics) by Science News
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