Why did Edison invent the electric light?

Edison bought a newspaper from a man who claimed to be from modern times. In the middle of the night, Edison looked at the candle and began to move away. He couldn't see anything clearly. Later Edison got a little closer, but the candle burned the newspaper mercilessly. Edison vowed to invent something that can glow by itself, not fire, of course. Edison saw a small column in the newspaper: there is little information about famous inventors at home and abroad. It says: "Edison (actually wrote my name) invented thousands of things in his life, the most famous of which was the electric light." Seeing this, Edison decided that history cannot be changed. In order to invent the electric light, I want to invent the electric light. There is a joke in the newspaper, which reads: "The family is watching TV and is at the critical moment of power failure. The daughter said eagerly, mom, light the candle quickly. Let's watch it. Edison sighed, how can I let such a lovely little sister watch TV with a candle on? Don't worry, I will invent something to stop you from watching TV with a candle. Edison found that his eyes were nearsighted. At the class party, in the middle of the night, the candles flashed, and he couldn't see clearly which students were. He just guessed in the newspaper, but none of them were right. What a pity! Even on blind date, I didn't see what the other person looked like, so I took a beautiful woman as an ugly woman. Edison made up his mind to invent something that can shine.