Neon lights are brightly emitting, electrically charged glass tubes or bulbs filled with thin neon gas or other rare gases, and are a type of cold cathode gas discharge lamp. A neon light tube is a sealed glass tube with electrodes at both ends, which is filled with some low-pressure gas. A voltage of several thousand volts is applied to the electrode, and the gas in the ionization tube emits light. The color of light depends on the gas in the tube.

Neon lights, due to their cold cathode characteristics, have a tube temperature below 60 ℃ during operation, making them suitable for outdoor exposure to sunlight, rain, or water. Due to its working characteristics, the neon light spectrum has strong penetration and can still maintain good visual effects in rainy or foggy days.