These are come discrete spectral lines observed from some gas emission. By observing these emission spectral we can actually identify the kind of gas in the tube.
As usually I was busying taking photos and fail to take down notes of the gas emission.
The spectral below is Neon. ( If I paid attention enough)
Can't remember what's this. Didn't take down notes - was busying trying to take photos of other emission, didn't manage d to get any good pics.
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