① 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 materials, processing to installation. The life span of neon tubes can be as high as 20000h-30000h. In our country's local standards, it is required to be no less than zaooha cold cathode discharge lamps. The great advantage is that the number of switching times basically does not affect its life, so it is especially suitable for advertising lamps that need to be switched on and off frequently. ②It 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 needed to accelerate the positive ions to provide energy, and the cathode potential drop is about 100V-20...
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