DecadeCounter.com posted this video of their single digit numitron clock, the YS-950, powering an end-view numitron. Check it out:

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#1 Juergen Grau 2011-02-05 23:33
As I remember, someone asked for the colour of this LED.
It's called "ocean green" or similar and such LEDs have a wavelenght light output of 500...505 nm.
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