Edison may be most known for his invention of the light bulb, however; few people realize the light bulb had been around for some years before it became an Edison innovation. Electric lights at the time were expensive and unreliable, and Edison was looking to fix that. Edison created a vacuum inside the bulb, found the right filament to use and ran lower voltage through the bulb. These substantial improvements led to additional ones throughout the years, which made the light bulb a standard, everyday use device. An important side note to the light bulb is it led to Edison’s creation of the electrical utility system to power the light bulb.