Japan's First Fluorescent Lamp

It was 1934 when the fluorescent lamp invented by Dr.George E.Inman of GE was made fit for practical use.

Tokyo Electronic Company sent three engineers to GE in 1939 to help get their fluorescent lamp business operations underway.
These three engineers received technical training directly from Dr.Inman.
In 1940, they succeeded in building pilot fluorescent lamps.
However, all parts were hand-made, following GE's instructions.
Since no base for fluorescent lamps was available at that time, they used a 4-pin base designed for vacuum tubes.