The electrodeless fluorescent lamp, that is, the electrodeless lamp, is composed of a high frequency generator, a coupler and a bulb. It is inductively coupled into the lamp by the electromagnetic field of the high frequency generator to avalanche the gas in the bulb to form a plasma. When the plasma excited atom returns to the ground state, it emits ultraviolet rays. The phosphor on the inner wall of the bulb is excited by ultraviolet light to generate visible light. Interior Doors ,Interior Bifold Doors,Cheap Bedroom Doors,Hollow Core Interior Doors Foshan QI'AN Fireproof Shutter Doors Co., Ltd , https://www.qianfiredoors.com