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The blue/red color change occurs in some globes halfway the streamer, so not always at the border between streamer and pad. A paper, by...

The orange of neon, and the blue of argon/xenon, are fluorescence colors. De-excitation occurs in a sequence of smaller energy steps...

I'm sorry I annoyed you with my question. However, your quote from Wikipedia does not really answer my question about the different...

I have a common plasma globe with blue streamers and orange pads at both ends. The orange light is emitted by neon and the blue light is...