person who invented the light bulb, he actually improved upon previous inventions to create the first commercially efficient, widely used light bulb. The creation of the light bulb is thought to have begun in 1800 with Italian inventor Alessandro Volta s invention of the voltaic wire, which provided the first electrical current. That same year, English scientist Humphrey Davy created the first electric light. Throughout the next several decades, it is estimated that as many as 20 inventors worked on inventing a long-lasting incandescent light bulb. In 1879, Edison became the first to succeed. His bulb could burn for about 1,500 hours, compared with previous versions that lasted only minutes."
Just as Bardeen's and Brattain's invention was not the least bit practical. Haven't you seen the images of that goofy contraption? A huge triangle of plastic with gold leaf on the edges resting on a silicon slab. Not really smaller than the tubes of the day and *much* more fragile. It was others who made it practical and effective. How is that different?