Is there still a light when the lights are off? What s going on with the lights still on when the li

Compared with light bulbs, diodes are smaller in size, have a longer lifespan, and are less harmful to the environment. Electricity alone could save tens of billions of pounds a year. It can be used continuously for 100,000 hours, which is equivalent to 11 years.

Scientists predict that the historical task of the light bulb is about to be completed, and mankind is about to enter the era of light-emitting diodes. GaN-based high-brightness white light-emitting diodes (LEDs) will gradually replace existing incandescent and fluorescent lamps due to their advantages of energy saving, long life and environmental protection. The essence of the diode is the composite luminescence of the optical center of the semiconductor, and the specific mechanism is more complex, and the simple point is the electric field near the ion sphere, so that the impurity optical center in the semiconductor diode has a composite effect and converts the electric field energy into light energy, specifically involving the composite theory of semiconductor luminescence, and the recombination of the donor and the acceptor in the semiconductor, which is more complex and will not be repeated. It is the use of low-pressure mercury vapor to radiate ultraviolet rays during the discharge process, so that the phosphor emits visible light emitting the principle of light, so it belongs to the low-pressure arc discharge light source.

The fluorescent lamp is equipped with two filaments. The filament is coated with electron-emitting materials ternary carbonate (barium carbonate, strontium carbonate and calcium carbonate), commonly known as electronic powder. Under the action of AC voltage, the filament acts alternately as a cathode and anode.

The inner wall of the lamp is coated with phosphor. The tube is filled with argon at a pressure of 400pa-500pa and a small amount of mercury. When energized, liquid mercury evaporates into mercury vapor with a pressure of Pa.

Under the action of the electric field, the mercury atom is continuously excited from the original state to the excited state, and then spontaneously transitions to the ground state, and radiates the wavelength and ultraviolet light of 185 nm (the main peak wavelength is, accounting for about 70-80 of the total radiant energy; The sub-peak wavelength is 185 nm, which accounts for about 10 of the total radiant energy) to release excess energy. Phosphors absorb the radiant energy of ultraviolet rays and emit visible light. Different phosphors emit different amounts of light, which is why fluorescent lamps can be made in white and various colors.

Since most of the electrical energy consumed by fluorescent lamps is used to produce ultraviolet light, the luminous efficiency of fluorescent lamps is much higher than that of incandescent lamps and tungsten halogen lamps, and it is currently the most energy-efficient electric light source. Gas discharge is an electric light source that converts electrical energy into light. There are many types of gas discharge, and the most commonly used are glow discharge and arc discharge (see arc discharge).

Glow discharge is generally used for neon signs and indicator lights. Arc discharge can have a strong light output, and the illumination source is arc discharge. Fluorescent, high-pressure mercury, sodium, and metal halide lamps are the most widely used gas discharge lamps for lighting.

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.

Not dangerous. LED is very sensitive to the base voltage of the electric backup, and there will be a microcurrent passing through the slight voltage, and it will be slightly bright. Incandescent lamps also have microcurrents passing through, but incandescent lamps need a lot of power to emit light, although they can't be seen, but there are also microcurrents passing through.

LED lamp: LED lamp is an electroluminescent semiconductor material chip, cured to the bracket with silver glue or white glue, and then connected to the chip and circuit board with silver wire or gold wire, sealed with epoxy resin around it, to protect the internal core wire, the most imitative after the installation of the shell, so the LED lamp has good seismic performance.

Incandescent lamp: An incandescent lamp is an electric light source that heats the filament to an incandescent state and uses thermal radiation to emit visible light. It was invented in 1879 by American inventor Thomas Alva Edison.

Since the production of carbon fiber (i.e., Zesong carbon filament) incandescent lamp, the luminous efficiency of incandescent lamp has been improved accordingly through the continuous improvement of filament material, filament structure and filling gas. In 1959, the United States developed tungsten halogen lamps with very small volume and light decay on the basis of incandescent lamps. The development trend of incandescent lamps is mainly the development of energy-saving bulbs, and the structure and components of incandescent lamps with different uses and requirements are not the same.

The light color and light collection performance of incandescent lamps are very good, but because of the low light efficiency, they have been gradually withdrawn from production and sales.

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.

Summary. If the light is turned off and the light is still on, it may be due to the following reasons: There is a problem with the lamp itself

It may be due to aging or damage to the bulb, or a faulty circuit inside the lamp. Lamp wiring problem: It may be that there is a problem with the wiring of the lamp, resulting in unstable current or leakage, resulting in the light being turned off and still bright.

If the light is turned off and the light is still bright, it may be caused by the following reasons: there is a problem with the lamp itself: the wild jujube can be caused by the aging of the bulb or the damage in the reputation, or the fault of the circuit inside the lamp.

Lamp wiring problem: It may be that there is a problem with the wiring of the lamp, resulting in unstable current or leakage, resulting in the light being turned off and still bright.

I'm still a little confused, can you be more detailed?

If the light is turned off and still shining, it may be due to the following reasons: there is a problem with the lamp itself: it may be due to aging or damaged bulbs, or it is caused by a faulty circuit inside the lamp.

Wiring problems of lamps and lanterns: It may be that there is a problem with the wiring of the lamps, resulting in unstable current or leakage of slag and electricity, and the lights are turned off and still bright. In order to solve this problem, you can try the following methods:

Replace the bulb: If the problem is caused by the aging or damage of the bulb, you can replace it with a new one. Check the fixture wiring:

The wiring of the luminaire can be inspected for loose or damaged wiring, and if there is a problem, it can be repaired or replaced. Adjust the switch position: Sometimes the light is off and still bright because the switch position is incorrect, you can try to adjust the switch position or replace the switch.

Here's why:The starter of the LED light has a capacitor inside, and after the light is turned off, if there are lines with high current around the starter or the lines are dense, induced electricity may be generated. If the induction electricity is stronger, it will make the LED lamp glow slightly; The weak induced charge will cause the induced charge to accumulate inside the capacitor until the number of charges is large enough, and the capacitor will release it all at once, causing the LED light to flicker.

Introduction:

Lamps, lighting supplies, generally refer to appliances that can be illuminated. In ancient times, humans used torches for lighting, and later there were candles and oil lamps. In ancient times, a "candle" was a torch made of flammable materials, and the torch that had been lit was called a candle. The piles of fine grass and branches that are placed on the ground to be lit are called fires, and those that are placed outside the door are called candles, and those that are inside the door are called court fires.