Neon is used for advertising sign
It sounds like you are referring to "neon" signs. About 1/3 of all "neon" signs actually use tubes filled with very low pressure neon. The rest use other noble gases like helium, argon, krypton, and xenon - often with something like a minute amount of mercury added and a phosphor coating to the glass so that the resulting UV light produced when the gas is electrified can be converted to other colors by the phosphor coating (which fluoresces when bombarded by the UV).
Neon lights are an interesting thing. They provide years and years of service without ever burning out. They are made from the noble gases, so they are completely inert. They are capable of passing an electrical current though, and by doing this it provides an interesting colour/ appearance, depending on what gas is used/what additives are involved. They may be used either for their longevity or their bright colours, as they attract the eye.
It's a Scallop shell.
vishon is the best
Neon gas is used in neon-signs, Vegas is full of them.
Its mostly Argon and a small amount of mercury. Its the main ingredients inside a flourescent lightbulb, which are used to light up billboards and highway signs. See the related link for more information on flourescent bulbs.
If you're referring to neon signs, the gas used is either neon, or argon (used with mercury). Fluorescent lights use the same principle as neon signs.
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The answer to this is neon.
The gas used is neon.
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The noble gas Neon is in neon signs.
Neon is used for advertising sign