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These colorful signs have been lighting up streets for decades. But have you ever wondered what gives them their glow? The glow comes from a special combination of gas and electricity. **How Gas and Electricity Create Neon Light** A neon sign is essentially a glass tube filled with gas. Electricity flows through the tube and excites the gas inside. The type of gas used determines the color of the sign. - **Neon Gas**: Emits a bright red or orange light. - **Argon Gas with Mercury**: Creates a vivid blue light. **Why Neon Signs La