Neon lights are bright, luminous glass tubes or bulbs filled with a thin layer of neon or other rare gases; they are cold cathode gas discharge lamps. A neon tube is a sealed glass tube with electrodes at both ends, filled with a low-pressure gas. A voltage of several thousand volts is applied to the electrodes, ionizing the gas in the tube and causing it to emit light. The color of the light depends on the gas in the tube. Neon light is a transliteration of neon lamp; neon gas, a rare gas, emits a popular orange-red light, but other gases produce different colors, such as hydrogen (red), helium (pink), carbon dioxide (white), and mercury vapor (blue).
Neon lights are the beauticians of the city; every night, as dusk falls and the lights come on, the colorful neon lights adorn the city with extraordinary beauty.
