Neon lighting is a type of illumination created by passing an electric current through gas-filled tubes, typically made of glass. The gas, usually neon, emits a bright glow when energized, producing vibrant colors. Different gases and phosphor coatings can create a variety of hues, making neon signs popular for advertising and decoration. Neon lights are often used in signage, art installations, and architectural designs. They are known for their eye-catching brightness and can be shaped into various forms, allowing for creative expression. Despite their popularity, neon lights are less energy-efficient than modern alternatives like LED lighting.