During the process of capacitor charging, the lamp is off, and the lamp can be seen to be off with the naked eye because of the low current inside the capacitor, which leads to a slow charging rate. When the capacitor is fully charged, the electrical energy is released at once and the lamp will be lit. But because the stored electric energy is less, the electric light will go out soon, and keep charging and discharging repeatedly, and what you see with the naked eye, is the light flickering.

What condition will cause the capacitor to flow a smaller current inside? Firstly, it is because the quality of the capacitor is not good, the high quality capacitor, which stores a lot of electricity, the tiny current in the line is not enough to store energy in the capacitor. In addition to this, we can start from the sources of the tiny currents.

1. voltage is added to both ends of the capacitor, it will produce a weak current. The fire wire is directly connected to the electric lamp, which will inevitably cause the LED light to flicker.

2. zero line charged electric lights (capacitors) are connected to both ends of the zero potential of the zero line, zero line more easily charged.

Zero fire line terminals are too close, insulation is not qualified, etc., may cause the lamp's zero line charged.

3. induction electricity if the capacitor around the wire more, other wires at work, it will make the capacitor near the induction electricity: two conductors placed in parallel, forming a new capacitance.