How Can The LED Lighting Fixtures Still Be Dimly Lit After The Power Is Cut Off?
In real life, many people have reported that LED lights still emit weak light after the lighting switch is turned off, which not only affects normal use but also makes people worry about safety issues.
Today, the author will share with you the three main reasons for this phenomenon.
It should be pointed out that the light-emitting element in LED lighting fixtures - LED semiconductor light-emitting diode device is a very sensitive device to current.
First of all, the reason why the LED lamps still emit dim light after power failure is caused by the control of the lighting switch to the neutral line (normally specified as the live line), which accounts for nearly half of the causes of such phenomena! When the lighting switch controls the neutral wire instead of the live wire, since the LED lamp is always charged, the induction phenomenon between the live wire and the ground wire is very easy to occur, forming an induced current and causing the LED lamp to emit dim light! In this case, LED lamps have the commonality of continuously emitting low light, and other LED lamps in the room may also occur at the same time (extension: fluorescent lamps will flicker after power failure in this case).
Secondly, with the improvement of living standards, in order to pursue the quality of life and convenience, people often purchase light switches with indicator/backlight functions for night operation. But who knows that this way, it is very easy to cause the charged LED lamp to form a path through the switch's built-in indicating circuit after the switch is turned off (equivalent to the LED lamp and the switch indicating circuit connected in series to AC220V). Although the current value in this circuit is small, it is very easy to cause the LED lamps to emit dim light! In view of this, when purchasing light switches with backlight indication function, you may wish to purchase non-electric fluorescent (commonly known as luminous) products.
Finally, it is necessary to reveal the reason why the LED lamps are still dimly lit when the power is off. Although it is rare in practice, it is very concealed and deceptive. LED lamps are semiconductor products that are extremely sensitive to current. If there are multiple wires of other electrical equipment around the LED lamp holder, the induced current generated between the wires will also cause the LED lamp to emit dim light when the power is off. ! To deal with this situation, the simplest and most effective way to deal with it is to use the tinfoil inside the cigarette/chewing gum to tightly wrap the other wires near the lamp holder, and use the short-circuit shielding method to eliminate this phenomenon.
