Edison’s Real Light Bulb Breakthrough

Listen to this. Thomas Edison didn't actually invent the light bulb. He perfected it.

Twenty-two other inventors created versions before him, but they burned

out too quickly or cost too much. Edison tested over three thousand designs and six thousand

materials before finding a carbonized bamboo filament that lasted over a thousand hours.

His real genius wasn't the invention itself. It was making light bulbs cheap and

practical enough for every home in America. That's how he actually changed the world.