Thomas Edison famously tested bamboo as a carbon filament material for incandescent lamps.
During the development of a practical incandescent lamp, Edison and his assistants tested thousands of materials. The filament had to become hot enough to glow while lasting inside a glass bulb from which most air had been removed. Bamboo became one of the most successful early materials because carbonized bamboo could produce a durable filament.
Edison’s laboratory examined bamboo from different regions, and Japanese bamboo was especially associated with successful early lamp filaments. The choice was part of a much broader search that included cotton thread, paper, wood fibers, and other carbonizable materials.
Bamboo was not the only filament Edison used, and it was not the permanent answer for all later bulbs. Commercial lamp technology eventually moved toward other carbon filaments and, later, metal filaments such as tungsten. The important achievement was creating a complete, usable lighting system rather than merely finding one filament material.