Most neon lights use cold cathode glow discharge. When the cold cathode is working, the whole lamp basically does not generate heat, and the efficiency of converting electric energy into light energy is high. Its life span is much longer than that of ordinary fluorescent lamps. For example, the quality can be guaranteed from material, processing to installation. The life span of neon lamp tubes can be as high as 20000h-30000h. It relies on positive ions bombarding the cathode to make the cathode emit secondary electrons to maintain the discharge, so a certain cathode potential drop is required to provide energy for the acceleration of the positive ions, and the cathode potential drop is about 100V-200V. In order to ensure the discharge in the normal glow discharge area and no large cathode sputtering occurs during operation, the cathode must have a large enough area, otherwise the cathode current density will exceed the cathode position due to the large current flowin...
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