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1. Why there is light after the light is turned off:
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Neutral line and live line connection error: when the power switch is installed, the power switch is connected to the neutral line, not the live line. If you put it in the wrong way it will cause the light to turn off the switch and there will be a faint glow.
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2. Solution:
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Just connect the power off switch from the live line to the neutral line.
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Extended information:
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Sometimes after the power failure, the capacitor in the driver circuit will store some electrical energy, too late to release, will make the light continue for a period of time, after the release of electrical energy, can be extinguished.
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If it is leakage, or inductive electricity, there will be a long time of light, but the current is very small, will not affect the life of the lamp, the power consumption is also extremely weak, will not affect your billing, this is not a big problem, do not worry.
This situation generally occurs in leds and other lights powered by electronic components.
This situation is generally zero, the fire line is reversed.