Thomas Edison is widely credited with developing the light bulb, although several inventors contributed to its creation. He improved upon existing designs and developed the first commercially viable incandescent light bulb in 1879. Edison's version utilized a carbon filament in a vacuum bulb, which significantly increased its longevity and effectiveness. His successful demonstration of electrical light in homes and businesses marked a turning point in society, leading to the widespread adoption of electric lighting, revolutionizing how people interacted with the world after dark and facilitating advancements in various industries.