<i>Nightfall</i>, as mentioned at the end of the piece, is a great little early Asimov story - a culture to whom candles are alien and the idea of artificial light is bizarre. Thoroughly recommend. In fact, here it is: <a href="https:&#x2F;&#x2F;www.uni.edu&#x2F;morgans&#x2F;astro&#x2F;course&#x2F;nightfall.pdf" rel="nofollow">https:&#x2F;&#x2F;www.uni.edu&#x2F;morgans&#x2F;astro&#x2F;course&#x2F;nightfall.pdf</a>