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Because of the heat, out of all the metals, tungsten has the highest melting point.
http://wiki.answers.com/Q/Why_are_light_bulb_filaments_...
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Incandescent light bulb - Wikipedia, the free encyclopedia
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The incandescent light bulb , incandescent lamp or incandescent light globe is a source of electric light that works by incandescence (a general term for heat-driven light emissions which includ...
en.wikipedia.org/wiki/Incandescent_light_bulb
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out of a glass enclosure containing a spiral made out of high resitance material (W, Ti) and placed in an inert gas medium to avoid burning. the spiral heats up and starts radiating according to its temperature (first approximation to find ...
http://answers.yahoo.com/question/index?qid=20090211172...
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What is the filament of a regular light bulb made of? ... Did you know that Thomas Edison experimented for two years to find a suitable material for a light bulb filament? His first successful light bulb used a filament made from burned sewing thread. Tungsten, which has the highest melting point of all metals,
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www.mailtribune.com/archive/2000/april/041900n6.htm
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Circa 1991 Question: Different designs for light bulbs: How is one light bulb created to be powered by a 6 volt battery while another light bulb can be designed to operated from 120 V ac? For example, the material the filament is made of can greatly vary its resistance with the amount of heat (watts) that it dissipates.
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www.newton.dep.anl.gov/askasci/phy99/phy99016.htm
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He even thought about using tungsten, which is the metal used for light bulb filaments now, but he couldn't work with it given the tools available at that time ... The Edison lamp from our Attic is dated January 27, 1880. It is a product of the continued improvements Edison made to the 1879 bulb. Even though it is over...
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www.fi.edu/learn/sci-tech/edison-lightbulb/edison-light...
www.fi.edu/learn/sci-tech/edison-lightbulb/edison-lightbulb.php?cts=electricity
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An electric lamp in which a filament is heated to incandescence by an electric current. Today's incandescent light bulbs use filaments made of tungsten rather than carbon of the 1880's. ... He even thought about using tungsten, which is the metal used for light bulb filaments now, but he couldn’t work with it given the...
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www.ideafinder.com/history/inventions/story074.htm
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Light bulb filaments are made by sintering (melting) powdered tungsten metal into feed stock and then extruding (pulling out) the metal through a series of diamond extruding molds into fine wire. These extrusion marks are also evident in this image.
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invsee.asu.edu/ImageGallery/Real/PhysicalSciences/em/tu...
invsee.asu.edu/ImageGallery/Real/PhysicalSciences/em/tungsten/Wfilamentlll.html
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The amazing thing about this historical turn of events is that the light bulb itself could hardly be simpler. The modern light bulb, which hasn't changed drastically since Edison's model, is made up of only a handful of parts.
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www.howstuffworks.com/light-bulb.htm
www.howstuffworks.com/light-bulb.htm
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