Why are neon lights a cold light source? What does the bright neon light mean?
Neon lights rely on the electrode heads at both ends of the light to ignite the rare gas in the tube under a high-voltage electric field, so it is very different from traditional lamps. Many people may not know why neon lights are cold light sources. In fact, they mainly emit light. Below, BENWEI LIGHT will explain it to you. Secondly, many people will ask what is the meaning of bright neon lights. Let’s explain it together.
Why are neon lights a cold light source? What does the bright neon light mean?
Why are neon lights a cold light source?
Neon lights are bright and luminous, energized glass tubes or bulbs filled with rare neon gas or other rare gases. It is a cold cathode gas discharge lamp. The neon 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 causes it to emit light. The color of the light depends on the gas in the tube. Neon light is the transliteration of neon light. Neon, a rare gas, emits a popular orange-red light, but the use of other gases will produce other colors, such as hydrogen (red), helium (pink), carbon dioxide ( White), mercury vapor (blue).
The luminescence of neon lights is different from that of ordinary incandescent lights. The incandescent lamp generates heat by the electric current flowing through the filament due to the resistance effect, so that the temperature of the spiral filament rises above 2000 ℃ and emits light. Neon lights are different. There is no filament inside (only electrodes at the end), and the thin tube is filled with inert gas (neon, argon, krypton or xenon). Once a high voltage (10-15 kV) is connected to the electrodes at both ends of the neon light, a small amount of free electrons in the tube will move to the anode under the action of the high voltage, and accelerate while hitting the inert gas molecules, so that the gas in the tube will be quickly dissipated. Ionize and become a plasma state. At the same time, the ions are accelerated by the electric field to form a current that runs through the entire lamp tube. These ions continue to collide (ionize) and recombine, and they will emit a variety of colors corresponding to the transition of specific atomic energy levels. Therefore, this discharge is also called "glow discharge". The color of the neon light is related to the type of inflatable body in the tube: if the tube is filled with neon gas, it emits a warm yellow light; if it is filled with argon gas, it emits a cool blue-white light . The actual neon lamp can emit light of various tones because the inner wall of the tube is coated with phosphors of different materials. Different inert gases with different phosphors can make neon lights emit red, orange, yellow, green, blue, indigo, purple and other colors of light.
Neon lamp is a kind of gas discharge lamp, which is a cold light source (the current in the tube is very small, only tens of milliamperes, and does not produce high temperature). The incandescent lamp is a heat source, which emits light of the full color spectrum, and a large part of the energy is wasted due to heat generation or electromagnetic waves of its waveband. You know, nearly 1/4 of the electricity generated in the world is used for lighting. Therefore, the European Union has banned the sale of incandescent lamps since 2012, and China has also begun to gradually ban it in order to save electricity consumption.
Why are neon lights a cold light source? What does the bright neon light mean?
What does the bright neon light mean?
Brilliant (cuǐ càn), describes pearls and jade with bright brilliance and very gorgeous. Also used for people or things. The brilliance of neon lights means that neon lights can be seen everywhere, their brilliance is dazzling, there are feasting, lights everywhere. It also shows that neon lights are very common in actual use, and very common in life. Neon lights are the beauticians of the city. When night falls, when the lights are on, the colorful neon lights make the city extraordinarily beautiful.
Why are neon lights a cold light source? What does the bright neon light mean?
The above is an explanation of the knowledge of why neon lights are cold light sources and what it means to be bright. The content is for your reference only, and I hope it can be helpful to everyone.
