Gas in Advertising Lights is a term used to describe the use of NEON gas in illuminated signs. NEON gas is a type of inert gas that is used to create bright, colorful light displays. It is often used in outdoor advertising signs, such as those found on the sides of buildings or along highways. NEON gas is also used in interior lighting, such as in bars and restaurants. The use of NEON gas in advertising lights has become increasingly popular in recent years due to its ability to create eye-catching displays.