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The dimming table lamp is based on the incandescent lamp principle. By adjusting the current through the incandescent lamp to control the intensity of the light, the current is generally adjusted by using a triac, and the current through the load is controlled by adjusting the trigger angle to control the voltage waveform. The dimming principle of the dimming table lamp will lead to high harmonics in the circuit, which will invalidate the rectifier circuit of the electronic ballast (which was originally designed according to the 50Hz sine wave), which causes the high-frequency oscillation circuit to be abnormal and easily damaged.