This story is about the envention of the incandescent bulb.
It was invented by Thomas Edison.
The incandescent bulb was invented in 1892.
There were a lot of scientists who had tried to invent it before.
The invention was really important because such a bulb could work with the electrical system and used a small amount of energy.
Nowadays,we use such a bulb everywhere and we can`t imagine our life without this invention.