Who invented incandescent bulb?

Thomas Edison developed the first commercially practical incandescent light bulb in 1879, using a carbonized bamboo filament that could burn for over 1200 hours. While earlier inventors like Humphry Davy and Warren de la Rue created electric lighting, Edison's design was the first viable for widespread use. The key innovation was the high-resistance filament that required less current and a better vacuum to prevent oxidation.