I've bought similar bulbs, with leads. Several years ago I bought a box of 1000 green "NE-2" from China, and sold a few batches to neo-nixie members.
It's hard to tell what the internal gas is, but when it ionizes it also causes the phosphor coating of the bulb's interior to glow. The nice thing is that the glowing area is the entire interior surface of the bulb, and not just the negative electrode in a conventional neon bulb. When off, the bulb appears white. Other colors such as blue, red, yellow, and white are available. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/b98e1e38-8f32-4bea-93ee-a8beef4f3cb6%40googlegroups.com.
