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Humprey Davis invented the first electric light called the Davy light which miners would where to see while mining.
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"Warren De la Rue enclosed a platinum coil in an evacuated tube and passed an electric current through it.' http://inventors.about.com/library/inventors/bllight2.htm
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Edward Shepard invented an electrical incandescent arc lamp using a charcoal filament
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"Henricg Globel, a German watchmaker, invented the first true lightbulb. He used a carbonized bamboo filament placed inside a glass bulb". (http://inventors.about.com/library/inventors/bllight2.htm)
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Joseph Swan invented a carbon filament light bulb that burned up very quickly.
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In 1877, Charles Brush made carbon arcs to light a public square in Cleveland, Ohio.
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"In 1879, Edison discovered that a carbon filament in an oxygen-free bulb glowed but did not burn up for 40 hours"(http://www.enchantedlearning.com/inventors/edison/lightbulb.shtml).
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In 1882, Latimer developed and patented a method of manufacturing his carbon filaments.
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In 1903, Willis R. Whitney invented a treatment for the filament so that it wouldn't darken the inside of the bulb as it glowed
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In 1910, William Coolidge invented a tungsten filament which lasted even longer than the older filament.
