The element primarily used in neon lights is neon (Ne), which is a noble gas found in Group 18 of the periodic table. When an electric current passes through sealed glass tubes filled with neon gas, it emits a bright red-orange glow. Neon lights have become iconic in signage and decoration due to their vibrant colors and brightness. Furthermore, other noble gases like argon and krypton can be used to produce different colors when mixed with phosphor coatings or when subjected to electrical excitation. The flexibility and aesthetic appeal of neon lights have made them popular in art, advertisements, and urban environments.