(p. 112) We forget just how painfully dim the world was before electricity. A candle – a good candle – provides barely a hundredth of the illumination of a single 100-watt light bulb. Open your refrigerator door and you summon forth more light than the total amount enjoyed by most households in the eighteenth century. The world at night for much of history was a very dark place indeed.
Bryson, Bill. At Home: A Short History of Private Life. New York: Doubleday, 2010.