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in january of 1879 thomas eddison invented the light bulb. the reason he invented the lightbulb was so people wouldnt need to use lamps and they could use electric light. this made it much more safe.
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this change to the light bulb was in 1882. this was the first recorded mini incandescent light bulb. these lights were used for christmas trees. they were not in hoses for a while.
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this change to the light bulb was in 1898. this was the osmium lamp. it was invented by carl auer von welsbach. it was the first metal filament incandescent lamp.
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this change to the light bulb was in 1904 on dec 13. this was the tungsten filament lamp. it was invented by hungarian sandor just and crotian franjo hanaman. this lamp was made to last longer and give off brighter light.
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this chang to the light bulb was made in 1906. the general electric company made filaments sintered tungsten
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this change to the light bulb was made in 1911. ductile tungsten wire was used for incandecent
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tthis change to the light bulb was in 1913 irving langmuir filled a lamp with inert gas not a vacuum. wich equalled 2 luminous efficiancy. it also reduced bulb blackening.
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this change to the light bulb was made in 1930. lamps were filled with krypton gas rather than argon. this was invented by hungarian imre brody
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efficancy and production had been improved. incandecent lamps were less.
