📅 Guess the Year
In what year was the first practical light bulb invented?
The answer
1879
Lamps had glowed since 1802, but Thomas Edison’s carbon filament, tested in October 1879, was the first that lasted: about 13½ hours.
Source: The Carbon-Filament Lamp – Thomas A. Edison Papers, Rutgers
Sent in by Ines R
Asked in Plain #17 on Tuesday, November 3, 2026.
More questions
- 📅 In what year was LEGO founded?
- 📅 In what year was Bitcoin launched?
- 📅 In what year did SpongeBob SquarePants first air?
- 📅 In what year was Harvard founded?
- 📅 In what year did TikTok launch internationally?
- 📅 In what year did Apple first present the iPod?