Why is the light off and still on? What s going on with the lights still on when the lights are turn

Ordinary incandescent lamps don't do this, you're talking about fluorescent lamps, right? The normal switch controls the live wire. If the neutral line is controlled, the fluorescent light will also turn on when the light is turned off.

It's not normal bright, it's bright and dark. If it is an LED light, it flashes when it is turned off. The reason is that there is an indicator light on the switch.

Just replace the switch without the indicator or remove the indicator wire.

This phenomenon is mostly due to the fact that the switch does not control the live wire or the lamp wire is too long in parallel with the live wire, and there is an induced voltage. The internal resistance of LED lamp beads is large, and the weak current can emit light, so it is necessary to pay attention to the insulation of the metal lamp disk, because only one end of the lamp and the ground generate a loop current to emit light. Also pay attention to whether there is strong electric field interference around the lamp.

Hello: 1, In the [high-frequency transformer] of LED lighting, [electrolytic capacitor] is designed for filtering to provide stable direct current, LED can be (no flicker) lighting.

2. After turning off the lamp, due to the residual voltage of the electrolytic capacitor, you can drive the lamp bead with low voltage, and after a period of time, the residual voltage disappears, and the lamp bead will be extinguished.

3. There is also a situation that the [use] switch with indicator light, there will be a phenomenon that it will not be turned off, which is caused by the [leakage current] generated by the indicator light [parallel connection] on the switch.

1. First disassemble the switch and leave the line, if the light is not on at this time, the switch is broken. (The problem is that the contacts of the original switch are not separated, and the light is on).

2. There is a short circuit in the section of the line from the circuit to the switch (the circuit is formed before the switch is passed, and the light is on).

3. The line of this lamp is connected to the wrong line (check whether the position of the zero line of the live wire is correct).

The switch is leaking!

Very simple test method:

1.Turn on the switch box.

2.Using an electrician's pen, look at the two wires on the switch, 3Both are bright, one brighter and the other faintly glowing.

LEDs and other very low voltages will be on. Energy-saving lamps do not light up at low voltages.

That's what my family is. It took me half a day to understand.

Note: Do not touch any of the wires with your hands.

It's best to stand on a stool and don't hold on to a wall!!

When the electrician wiring, the switch wire was connected incorrectly, and the electrician was asked to change it and let him put the live wire into the switch.

Why is the light still slightly lit when it is turned off? Old electrician: Actually, this kind of fault is very simple, and it can be penetrated at one point.

It's the wire of fire that is reversed, that's right!!

In the case of energy-saving lamps, then these faint brightness emitted are the glow of phosphors, which is the light emitted by the remaining stimulated electron transitions. However, these glows don't last long, so you won't see them flash again after a while.

If it is an LED light and glows for a long time at night, it will be turned on and connected to the zero line during the decoration, and the LED light is directly connected to the live wire, resulting in a weak current passing through it. Turn on the light to control the zero line, turning off the light only cuts off the power circuit of the lamp, the live wire is still connected to the lamp, and the lamp will be molded to scatter the shimmer.

Solution: Reconnect the circuit and let the switch control the live wire.

Of course, if there is a problem with the circuit at home, you must pay attention to check the circuit, turn off the main switch to prevent the danger of electric shock, and find a professional electrician to check and repair the situation that you can't solve by yourself.

Screw the headlight switch to AOTU or OFF to turn it off! The brake light is always on, and there is a sensor on the brake pedal! There's a rubber top between the sensor and the pedal!

Look at it if it's still there, it's going to crumble when it's not aging! Just find something to top! You can use a buckle as long as you can withstand the brake switch, and the reason why the brake light keeps on is:

1. Lack of brake fluid; 2. Short circuit of tail lamp bulb; 3. Brake pads are worn and aged; 4. The brake switch is damaged; 5. There is a problem with the sensor of ABS. The solution to keep the brake light on is: 1. Replace the brake bulb; 2. Replace the brake light fuse; 3. Replace the brake light switch; 4. Check whether the line is short-circuited.

The working principle of the brake light is: the driver steps on the foot brake pedal, presses down the contact point of the brake light switch, makes the brake stove virtual finger light circuit on, the brake light lights up, releases the brake pedal, the switch contact of the brake light is disconnected, the brake light is off, and the car brake light is installed at the tail of the car, which can make the vehicle driving behind distinguish the hidden state of driving.

Description of the phenomenon Some people can still see a faint light after turning off the lights, what is the reason for this? Is this normal? Let's ** it.

First of all, this bright light phenomenon may be caused by electronic components. Modern electrical appliances have various electronic components built into them, which absorb the surrounding light and reflect it through the substance, causing the so-called "photoelectric effect" to emit light. Sometimes, when an appliance is turned off, it still emits light because the electronic components store energy that causes it to glow.

Secondly, it may also be caused by environmental factors. A typical example is the pale blue light of the night sky, commonly known as the "earth's sky". This is because when the atmosphere is illuminated by daylight, most of the light is scattered, and the scattered light forms a pale blue glow.

At this time, if the lights are turned off indoors, they may also appear slightly bright.

Is it normal After receiving normal light for a period of time, it is acceptable to produce a slight brightness. In most cases, it's just the result of energy released by the electronic components, so there's no need to worry.

However, if the room continues to glow significantly after the lights are turned off, then there is a need to consider whether there is a safety hazard. Especially in the case of using electrical appliances, if the appliance emits a visible light, then it is likely that there is a safety issue and needs to be checked in time.

For weak light, you can unplug electronic equipment such as electrical appliances, TVs, computers, and Hewlett Motors to eliminate hidden dangers. At the same time, when decorating the interior, you can ensure the safe operation of electrical appliances by purchasing electrical appliances that meet safety standards, or uniformly maintaining electrical appliances.

In addition, the use of comfortable lighting in the room to ensure sufficient and uniform light is conducive to eliminating this weak light phenomenon. In addition, we can also choose some night lights that do not emit light to replace them to achieve the effect of lighting and reduce the discomfort and safety hazards caused by the light.

Conclusion It is not uncommon for the lights to be turned off and still have bright lights, and there is generally no need to worry too much about weak lights. However, if there is a continuous, obvious light, then there may be a safety hazard and need to be eliminated in time. Frequent care and maintenance of electronic equipment, and the selection of appliances that meet the standards, is an effective way to prevent the effects of this problem.

The neutral wire and the live wire are reversed: because the neutral wire and the live wire at the empty opening are reversed, the bulb will always be in a slightly bright state after the switch is turned off, and only need to be rewired. Phosphor level failure:

Because the phosphor level in the bulb fails, it will glow faintly when it is turned off. Aging or damage to the bulb: Due to the aging or damage of the bulb, the light will be slightly bright even when the light is turned off, and a new bulb needs to be replaced.

1. The zero wire and the live wire are reversed: because the neutral wire and the live wire at the empty opening are reversed, the bulb will always be in a slightly bright state after the switch is turned off, and only need to be rewired.

2. Phosphor level failure: Because the phosphor level in the bulb fails, it will emit a faint light after it is turned off.

3. Aging or damage of the bulb: due to the aging or damage of the bulb, there will be a situation where the light is still slightly bright when the light is turned off, and a new bulb needs to be replaced.

During the use of the lamp, it is inevitable that there will be some problems, such as the bulb is still in a faint state after it is turned off. So, why is the bulb still faintly lit when the light is turned off? How to choose the right lamp for your home?

1. Why is the light bulb still slightly bright when the light is turned off?

1. If the empty opening of the home is reversed between the neutral wire and the live wire, it will cause the bulb to be in a slightly bright state after the switch is turned off.

2. If there is phosphor in the bulb, it may also emit a faint light after it is turned off.

3. The normal service life of the bulb is about one year, and if the bulb is aged or damaged, the possibility of this problem is also relatively large.

4. In the case of quality problems in the bulb itself, it is also possible to cause such problems, in this case, it is possible to find the merchant of the bulb to replace.

Second, how to choose the right lamps and lanterns for your home.

There are many types of lamps and lanterns on the market, including energy-saving lamps, LED lamps, incandescent lamps, etc., these lamps and lanterns can be said to have their own benefits.

1. LED lamps are both environmentally friendly and energy-saving, and the specifications of LED lamps are also covered and there are many kinds, we should also combine the actual area size of their own homes when choosing LED lamps to make a decision, generally 20 square meters of bedroom when using LED lights, 15 watts to 20 watts of macro potato trace power is the most suitable.

2. The wattage of incandescent lamps is relatively high, although it can play a better lighting effect, but the power consumption is very large, so for household use, incandescent lamps are not dominant.

Summary: We can find the main reason for the slight brightness of the bulb through the troubleshooting method, there are problems about the lamps and lanterns are introduced here, and friends who want to know more about household appliances can also continue to pay attention to the reports of Qeeka Home.

The firewire is used for the power-off switch, and the livewire will continue to supply power to the LED drive power supply after the power is off, so the LED light will have a faint glowing light after the switch is turned off.

Because when the electrician installs the power-off switch, the power-off switch is connected to the neutral wire, not the live wire. Electricians know that the power-off switch must be powered off with a live wire, and they don't know that there will be a risk of electric shock. If the power-off switch uses a live wire, the live wire will continue to supply power to the LED driver power supply after the power is off, so the LED light will have a faint glowing light after the switch is turned off.

The switch is incorrectly selected, and the switch with an indicator light (excluding luminescent) is not suitable for controlling low-power loads such as LED energy-saving lamps, because the current flowing through the indicator light is not small compared to the low-power loads mentioned above. A resistor of several hundred ks in parallel at both ends of the load will be improved, or the indicator switch can be replaced directly, and the indicator light of the switch can also be canceled.

Features: 1. Energy saving: The energy consumption of white LED is only 1 10 of incandescent lamps and 1 4 of energy-saving lamps

2. Longevity: The life span can reach more than 100,000 hours, which can be described as ordinary home lighting"Once and for all"。

3. It can work at high speed: if the energy-saving lamp is frequently turned on or off, the filament will be black and break quickly, so it is safer.

4. Solid-state package, which belongs to the type of cold light source. So it is well transported and installed and can be installed in any miniature and enclosed device without fear of vibration.

5. LED technology is advancing with each passing day, and its luminous efficiency is making amazing breakthroughs, and it is also constantly decreasing. An era of white LEDs entering the home is fast approaching.

6. Environmental protection, no harmful substances of mercury. The assembly parts of LED bulbs can be easily disassembled and assembled, and can be passed by others without the manufacturer.

7. The light distribution technology expands the LED point light source to the surface light source, increases the luminous surface, eliminates glare, sublimates the visual effect, and eliminates visual fatigue.

8. Integrated design of lens and lampshade. The lens has the function of concentrating and protecting at the same time, which avoids the repeated waste of light and makes the product more concise and beautiful.

9. High-power LED planar cluster packaging, and integrated design of radiator and lamp holder. It fully guarantees the heat dissipation requirements and service life of LEDs, fundamentally meets the arbitrary design of the structure and shape of LED lamps, and has the distinctive characteristics of LED lamps.

10. Significant energy saving. The use of ultra-bright and high-power LED light source, with high-efficiency power supply, saves more than 80% of electricity than traditional incandescent lamps, and the brightness is 10 times that of incandescent lamps under the same power.

1. First of all, it may be because when connecting the line, the zero line and the live wire are reversed, in this case, the switch gate and the zero line are connected together, and there is a slight light after the light is turned off. 2. If it is an LED lamp, it may be because its driving power output a large electrolytic capacitor, and the power stored in it is not fully discharged after the electric service lamp is turned off, and the LED lamp is very sensitive to current and will glow.

The battery indicator light is on, which means that it is in a state of discharge, and it goes off after starting the machine, which means that the generator is charging the battery and is in a charging state.

The solution to the car rear lights that can't be turned off all the time:

1. First open the door of the back seat of the car;

2. Sit in the middle of the rear seat;

3. Look up, just above the seat, there is a switch for the roof light;

4. There are three modes, ON is the continuous light mode, turn on this switch, the roof light will always be on, even if the car is locked, it will not go out;

5. The door mode will only light up when the door is opened;

6. OFF is off, select this mode, the roof light will always be off, and the light will not turn on.

Photo by Brother Choosing a Car) @2019