Thomas Edison wanted a light bulb that didn't use oil or gas, and that didn't burnout quickly.
Thomas Edison started experimenting in creating light bulbs.
He experimented with carbon filaments, and then metals like copper and platinum. They all failed, none of them succeeded.
Finally, on October 22, 1879 his experiment was a success.
He improved on his design, and on November 4, 1879 Thomas Edison filed a patent for his light bulb. His patent was later approved. Thomas Edison's light bulb was the first commercially accessible light bulb. It shows how important is was because it is still used to this day.