Electrodeless lamp belongs to the fourth generation of lighting products. It has no filament and no electrode. It is the abbreviation of electrodeless gas discharge fluorescent lamp. Compared with energy-saving lamps, metal halide lamps, high-pressure sodium lamps and other traditional light sources, it has significant advantages. Electromagnetic induction lamp is a high-tech product developed by comprehensively applying the latest scientific and technological achievements in the fields of optics, power electronics, plasma, magnetic materials, etc. it is a new light source with high luminous efficiency, long life and high color rendering, representing the future development direction of lighting technology. The electrodeless lamp is divided into high-frequency stepless lamp and low-frequency stepless lamp. Its luminous principle is basically the same, but there are also great differences.
The electrodeless lamp is composed of high-frequency generator, coupler and bulb. It is inductively coupled to the lamp through the electromagnetic field of the high-frequency generator, so that the gas in the bulb is avalanched and ionized to form a plasma. When the plasma excited atom returns to the ground state, it radiates ultraviolet light, and the fluorescent powder on the inner wall of the bulb is excited by ultraviolet light to produce visible light.