Let there be light

I’ve come across this a few times over the years, and been meaning to post it the next time I saw the numbers somewhere. And today I have, here:

In 1800, a candle providing one hour’s light cost six hours’ work. In the 1880s, the same light from a kerosene lamp took 15 minutes’ work to pay for. In 1950, it was eight seconds. Today, it’s half a second. In these terms, we are 43,200 times better off than in 1800.

The 1800 number I think is too high (I reckon you can go and find some wood in less than 6 hrs, or buy some for an amount smaller than 6 hrs of labour). Order of magnitude correct though.

I also think it takes less than half a second, by the way, today, plugging in average salary and electricity kw/h numbers for the UK.

But the thrust of the point is clear, we are massively better off than generations before because we have gotten more efficient at producing things. Four of the basic human needs, food, clothing, fuel, and housing, are now far cheaper in terms of the average wage.

And given it’s Easter, remember, stars died so that you could live.

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2 Responses to Let there be light

  1. Tony C says:

    A great talk on how technology and development will continue to out-pace our capcity to use available resources – some nice balance to scare-mongering

    • Marc Gawley says:

      Cheers Tony! Wait until you see tomorrow’s article using Physics to argue that economic growth can’t continue for more than a few hundred years. It doesn’t get more exciting than the laws of thermodynamics.

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