economics, electicity, energy, lighting

1,5 seconds earn you an hour of artificial light

I have stumbled upon an interesting stats while reading Rational Optimist by Matt Ridley. Lighting folks could make good use of it. Mind it was written in 2010!

Ridley poses a question how much artificial light one can earn with an hour work.

  • Sesame-oil lamp in 1750 BC: more than fifty hours of work
  • Tallow candle in eighteen hundreds: around 6 hours
  • Kerosene lamp in 1880: 15 minutes
  • Incandescent lamp in 1950: 8 seconds
  • Fluorescent lamp on the brink of the first decade of the new millennium: half a second

“From six hours to half a second – a 43,200-fold improvement – for an hour of lighting: that is how much better off you are than your ancestor was in 1800, using the currency that counts, your time,” says the author.

Kudos to Tim Ferriss and Naval Ravikant for a great reading tip.


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