La bombilla

The bulb

It was invented by Thomas Edison. It was in 1897, the United States.
Before the invention, the way they light up a room or somewhere else was by candles, fires, oil lamps, etc.
The first materials were: glass bulb, a carbon filament and connectors.
It was a great success leave a lit incandescent filament for several days.
Since then, the bulb was recognized as a new invention.
It was very useful, because with the previous lighting methods many of the homes were victims of fires for any fall or misuse them.