Before kerosene lamps, people actually used candles for lighting. At that time, in addition to using paraffin to make candles, animal fat was also used to make fuel. But at that time, we were relatively poor, so people would not slaughter animals casually, so they often spent their nights in the dark. In ancient China, people worked at sunrise and rested at sunset. It was because there was no light at night that they could not carry out any night activities. All I can do is sleep.
Later, before the industrial revolution, people knew how to use kerosene. However, because the purity of kerosene at that time was very low and unrefined, it contained many impurities, so after it was lit, the house was filled with very thick black smoke. It was so smokey that I couldn't open my eyes. Later, the method of distillation was used to refine kerosene. At that time, it was very expensive to refine it, so we did not dare to use too much kerosene.
In 1059, oil was discovered in the United States, and people began to purify the oil. The resulting kerosene was not only very bright, but also low-cost, so it was widely used. Moreover, oil was discovered one after another at that time, which caused the market price of this fuel to fall, and people could afford kerosene refined from oil.
By the eighteenth century, many scientists began to do research. Faraday invented the world's first generator, and people began to realize the existence of electricity. Coupled with Edison's efforts, the first electric light appeared. Electric lights are much more convenient to use than kerosene lamps, and they do not cause pollution, so people gradually became accustomed to using electric lights.
After Edison invented the electric light, he applied for many patents and promoted his own power system, which also enabled more people to use electric lights. It only took 40 years for 80% of the areas in the United States to have access to electricity. Until now, people still mainly use electricity for lighting, and the current electricity bill has also dropped a lot. Basically every household All can afford it.