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 have a lifespan of over 10000 hours under continuous operation and continuous electricity, which is an advantage that any other electric light source cannot achieve. Neon lights are made of glass tubes, which can be bent into any shape after firing, and have great flexibility. By selecting different types of tubes and filling them with different inert gases, neon lights can obtain colorful and multi-colored light.