what are gases used in neon signs?
What gases are used in neon signs? The rare gases, neon, argon, helium, xenon and krypton, are ideally suited for use in signs. The two most common gases used in neon signs are neon and argon. While neon is very bright, argon's light is weak due to its low resistance. Neon gas give... Making Neon Signs Neon signs that use an argon/mercury gas mixture emit a good deal of ultraviolet light. When this light is absorbed by a fluorescent coating, preferably inside the tube, the coating (called a phosphor) glows with its own color.