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In 1879, Thomas Edison created the first public demonstrated light bulb. Light Bulbs were invented to give off light. (Thomas Edison's sketch of the first light bulb)
https://dp.la/primary-source-sets/electrifying-america/sources/719 -
Peter Cooper Hewitt created a blue- green light. Using a way around electric current he was able to make the bulb with mercury Vapor. -
In 1904 European inventors came up with the idea of using tungsten filament. This addition helped the light bulb last longer and it made it much more brighter. -
In 1913, Irving Langmuir inserted gas into light bulbs. Langmuir used a gas like nitrogen in the bulb which doubled its efficiency. -
European Researches were experimenting with a neon tubes that were coated with Phosphors. Phosphorus is a material that absorbs light and turns it into light that is useful such as white light. -
In 1976 Edward Hammer discovered how to bend the fluorescent tube into a spiral shape. It was later created into the first Compact Fluorescent Light (CFL).
