Improv musician Atsuhiro Ito wields a flickering noise contraption called the "Optron" (or "Optrum"), a miked-up fluorescent light tube he plugs into an array of effects pedals and plays sort of like an electric guitar. The Optron is featured in some Sony Walkman commercials.

+ Optron - Walkman CM 1

+ Optron - Walkman CM 2 (with Yoichiro Shin on drums)

[More on YouTube: Atsuhiro Ito, Optrum, Optron]