After incandescent lamp and fluorescent lamp, LED lamps with low power consumption, high brightness and small size have become the leading role of home lighting market.But in real life, many residents and electricians reported that LED lights would still emit a weak light after the lighting switch was off, which not only affected normal use but also raised safety concerns.Today I will cause this phenomenon three reasons, share with you.It is important to point out that the light-emitting elements in LED lighting fixtures - LED semiconductor light-emitting diodes - are very current sensitive devices.Please keep in mind the prominent feature of LED lamps so that you can understand the reason behind.First of all, the reason that LED lamps still emit dim light after power failure is caused by the control of the lighting switch is zero line (the normal regulation is fire line), which accounts for nearly half of the reasons causing such phenomenon!When the lighting switch is controlled by the zero line instead of the fire line, the LED lamps are always in a state of electrified, then the fire line is very easy to induce the phenomenon between the ground lines, forming the induced current and causing the LED lamps to emit a faint light!In this case, LED lamps have the characteristics of continuous glimmer, other indoor LED lamps or at the same time, etc. (extension: fluorescent lamps will flicker after power failure in this case).As for how to deal with this fault phenomenon, I believe that the author does not need to say more we all know.
Secondly, with the improvement of living standards, people in order to pursue the quality of life and convenience, more will choose and buy with indicator/backlight function lighting switch, so as to operate at night.In this way, it is easy to cause the controlled LED lamp to form a path through the switch hidden indicator circuit after the switch is disconnected (equivalent to the LED lamp and the switch indicator circuit being connected in series to AC220V).Although the current valu