neon
Most luminous signs use neon gas to produce bright and colorful lighting effects. Neon gas is commonly used because it glows brightly when an electric current passes through it, making it ideal for creating eye-catching signs and displays.
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.
As a gas inside luminous lights.
It gives off light. That is what luminous means.
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.
The noble gas most commonly used in signs is neon. Neon gas is used to produce bright, vibrant colors in neon signs when an electric current passes through it.
Neon
Neon
I't actually spelled Xenon and it's used in electric signs (some signs have Neon gas, others have Xenon)
A luminous ball of plasma is a hot, ionized gas that emits light and energy. Examples include stars like the Sun, which are giant luminous balls of plasma that produce light through nuclear fusion in their cores. Plasma balls can be observed in phenomena such as lightning, neon signs, and some types of artificial lighting.
Neon gas is a colorless odorless gas that fills tubes that are often used in electrical advertising signs.
That gas is neon