Why do fluorescent lights keep flashing?

The main problem is that the switch is connected to the neutral wire, and it is good to change it to the live wire, please check.

It is also possible that the switch is "dirty" or the switch has an indicator light, and there is some leakage.

Secondly, the zero line is poorly grounded, and it will be lit up with an electric pen.

In the least possible case, the lamp wire is a dark wire, and there is leakage between it and other dark wires.

When the light is turned off, the filament will discharge the phosphor for the reasons mentioned above, and the light will turn on.

Because the circuit is not connected, the electrons on the phosphor have no time to be released, and the voltage difference between the filament and the phosphor does not reach a certain level, and the lamp is dim.

After a while, the electrons on the phosphor are gradually released, and a certain voltage difference between the filament and the phosphor will be reached, and it will be discharged again.

That's why it's 'flashing'.

This kind of 'non-stop' brightness is actually very dark, and it is not much to see during the day.

The reasons for the phenomenon of fluorescence or non-flickering glimmer or afterglow that does not go out immediately after the fluorescent lamp is turned off are:

1. The switch is not installed on the live line but on the neutral line. It should be changed.

2. If there is leakage in lamps and wires, it should be found and handled.

3. This phenomenon can also occur when using a switch with a fluorescent indicator bubble or capacitance damage inside an electronic ballast or brightener.

The voltage is not enough. The starter can't play normally, so it keeps flashing!!

Chuk's matter, if it doesn't work, change the lamp.

1. The switch that controls the fluorescent lamp is caused by an indicator light: because this capacitive indicator light is constantly charged and discharged, causing the fluorescent lamp to flicker, in this case, remove the switch and remove the indicator light.

2. The switch is set on the zero line, which causes the lamp body to be electrified: the switch is set on the zero line, and the lamp body, the switch and the zero line become a "capacitor", due to the charging and discharging phenomenon of this capacitance, the fluorescent lamp keeps flashing at night. In this case, the zero and live wires are swapped so that the switch can control the live wire.

3. After the electronic ballast fluorescent lamp and the human body induction switch are connected in series, although they can be inductively lit, when the switch is closed, the fluorescent lamp will flicker. This is due to the switch is not completely turned off in order to work normally, and there is a small current to charge the filter capacitor of the electronic ballast, when the voltage of the capacitor reaches the vibration voltage of the electronic ballast circuit, the capacitor discharges, the lamp glows, and the capacitor charge is discharged and starts to charge, and the phenomenon of fluorescent lamp flashing appears.

Generally, the fluorescent lamp flickers because its lamp is used for a long time, its internal resistance increases, and the voltage obtained on the starter gradually increases, when the voltage reaches the ignition voltage of the starter, the starter will flicker, and its flash speed also drives the flickering of the lamp. Generally, when encountering this situation, the following methods can be used to solve it:

1. If it is caused by the breakdown of the compensation capacitor in the starter, then you can rotate the starter, drag off a paper capacitor inside it, that is, a thing next to the small bulb, and then do not short circuit the remaining wires, and install it to continue to use.

2. If it is found that the tube with the light turned off on the day is more serious in two days, it means that the service life of the lamp has arrived, and the fluorescent lamp only needs to be replaced.

3. If it is a flash, it is a broken lightener, because the start of the fluorescent lamp depends on the connection and disconnection of the bimetal sheet in the lightener to produce high pressure, so that the fluorescent lamp conducts light, and the bimetal sheet in the lightener can not be disconnected normally, and the fluorescent tube will also flash and flash. The solution is to replace it with a starter.

Question 1: Why does the fluorescent lamp keep flashing? I am a professional electrician, I have seen too many of this kind of things, if the fluorescent lamp is flickering, you cherish to observe the blackness of both ends of the lamp, which is generally the bad point of the lamp, directly change the lamp.

If the lamp does not flash and the two hairs are red, it is a bad brightener. Pay attention to safety, turn off the power before changing the lamp.

Question 2: What is the reason for the flickering fluorescent lamp? It is estimated that it is a problem with the starter.

Fluorescent lamps work on a more complex principle than incandescent lamps. Its starting voltage is thousands of volts or even tens of thousands of volts, but the operating voltage after starting is lower than that of the mains. Because the fluorescent lamp needs enough energy to discharge the filament when it starts, the mains voltage is not enough.

Therefore, the fluorescent lamp of the inductive ballast needs to be added with a starter. When the power is turned on, there is a neon lamp in the starter, which contains a reed and an electrode, and the neon lamp discharges and emits light, so that the reed heats up and touches the electrode, and cools and disconnects after a few seconds. At this moment of disconnection, a high voltage of tens of thousands of volts is generated, and there is enough voltage to start the fluorescent lamp when the mains is added to the ballast.

Question 3: What is the reason for the fluorescent lamp light shaking and flickering, and how to solve it (urgent) Both reasons can cause the fluorescent lamp light to suddenly shake and flicker

The first fluorescent tube is old. Second, the starter does not work, and it can also cause the fluorescent lamp light to suddenly shake and flicker. (First of all, change to a new fluorescent tube, if it can't solve the problem, it must be a problem with the starter).

Question 4: What is the flickering of the fluorescent lamp, the reason for the flickering of the fluorescent lamp The luminous principle of the fluorescent lamp is the discharge **The gas in the lamp emits light, and the discharge has a frequency, and the rectifier is to control the frequency of the discharge, so the fluorescent lamp flickering is caused by the luminous principle;

Question 5: What is the reason for the fluorescent lamp at home, which flashes and flashes If the fluorescent lamp flashes sometimes, the voltage is not enough; If the fluorescent lamp keeps flashing, it may be that the ballast is broken, the lamp is broken, or the electrician is connected to the reverse when wiring, the possibility of the ballast being broken is relatively large, please replace the starter, the normal bulb line should be the live wire, and your home is using the zero wire, resulting in reflux electricity, so there will be a flashing phenomenon.

Question 6: What is the reason for the flash frequency of the fluorescent lamp The traditional fluorescent lamp is directly used for 50hz alternating current, and its strobe is 100hz, because the alternating current has two and a half waves in a cycle, and for the fluorescent lamp, the fluorescent tube emits light twice in a cycle of alternating current.

LED fluorescent lamps are usually driven using DC current and have no flicker.

Question 7: What happens when the fluorescent lamp at home suddenly flashes Is it still useful Fluorescent lamp or incandescent lamp If it is an incandescent lamp, it is not enough voltage If the fluorescent lamp is not broken, if the ballast is not broken, the possibility of the ballast is broken is relatively large Or the electrician is connected to the reverse when wiring, the normal bulb wire should be the live wire, and your home is using the zero wire, resulting in backflow electricity, so there will be a flashing phenomenon. Hope it helps.