These two charts were created from data presented in Matt Ridley's The Rational Optimist. Note that both graphs are using a logarithmic scale.
The second chart says the time worked to earn one hour of light fell from 50 hours to half of a second.
The Cost of Artificial Light – 1750 BCE to Present
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2 responses to “The Cost of Artificial Light – 1750 BCE to Present”
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In 1950 the primary source of lighting was cathode ray tubes, and in 2011 it’s backlit LCD’s. 🙂
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LOL. Something like that.
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