Did Edison invent the first electric lamp with tungsten?
Sustainable for more than 1000 hours, to achieve the purpose of durability. In one respect, this invention is Edison's life to achieve the culmination of the achievements.
In order to extend the life of the filament, he re-test, about 6,000 kinds of trial fiber materials, only to find a new luminous body - Japanese bamboo
Edison finally made a breakthrough in the study of the lamp after countless failures. On October 22, 1879, Edison lit the first light with a wide range of practical value.
The first only use the carbon wire, and later switch to bamboo wire, tungsten filament is invented by future generations.
