This was a interesting look at how we've evolved from tallow candles, beeswax candles, whale oil and kerosene to gas and electric lighting to now having so much light it makes it hard to see the stars. It really is incredible how quickly things changes in such a short time. We take electricity and lighting as a given these days, but we're not that far removed from the days where it wasn't. This history was an easy read that reads more as a novel than a textbook.