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Transcript of Haley
The light bulb was invented by Humphry Davy
in the year 1800. Everybody thought the light bulb was invented by Thomas Jefferson but he really just helped.
The oldest working light bulb has been glowing
for 108 years.
In most homes, up to 25 percent of our electric bills are for lighting.
Almost half of the electricity used by industry is for lighting.
Electricity travels at the speed of light
more then 186,000 miles per second.