How many times did Edison fail to invent the electric light?

Edison experienced tens of thousands of failures in the process of developing electric lights, and the specific figures cannot be considered. 1879,10,21,Edison's electric lamp was finally developed successfully. Edison tried nearly 1600 kinds of materials for this purpose and found a material that can be used continuously for 45 hours. This is the first electric lamp with wide practical value. This kind of electric lamp has many names, such as high resistance incandescent lamp, carbonized cotton silk lamp, and it is made of carbonized cotton.

1880, Edison sent assistants and experts around the world to find suitable bamboos, about 6,000 species. Among them, Japanese bamboo carbon fiber is the most practical, which can last for more than 1000 hours, achieving the purpose of durability. This kind of lamp is called carbonized bamboo filament lamp. At the beginning of the 20th century, carbonized filament was replaced by tungsten filament, and tungsten filament incandescent lamp is still in use today.

Extended data:

In fact, the electric light was not invented by Edison at first. As early as 1854, Henry Gaubert, a German watchmaker who immigrated to the United States, made the first practical electric lamp with carbonized bamboo wires in a vacuum glass bottle, which lasted for 400 hours, but he did not apply for a patent in time. 1860, joseph swan, an Englishman, also made a carbon filament lamp, but he failed to obtain a good vacuum environment to make the carbon filament work for a long time. Edison developed on the basis of predecessors and invented the electric lamp that can be used continuously for a long time.

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