Are LED table lamps safe to use? Why can t you use LEDs for table lamps?

The LED table lamp is not very ideal, and it hurts the eyes.

LED lighting, also known as solid-state lighting, as the third generation of lighting technology after incandescent lamps and fluorescent lamps, has the characteristics of energy saving, environmental protection, safety and reliability. The development of new solid-state lighting is not only a revolution in the field of lighting, but also in line with the requirements of "building a resource-saving and environment-friendly society" put forward by the current state.

In addition, the longer the LED lamp is lit, the faster the phosphor in the light source will decay, and as a result, the light in the blue light band that the human eye will be exposed to will become more and more intense, which will cause damage to the human eye. Therefore, looking at the LED light source for a long time can easily make people feel dizzy and uncomfortable, and even cause eye damage, which will increase the probability of suffering from eye diseases. Reminder, do not let your eyes stare at an excessively bright LED light source for a long time to avoid eye damage.

LED is widely used and is particularly suitable for auxiliary exterior lighting (LED light boxes, automotive LED taillights, etc.).

The light source of the LED desk lamp is more dazzling, and the eyesight is not good for people who work or rest under the lamp for a long time, so it is easy to produce eye fatigue, but its working voltage is low, the performance is relatively stable, the service life is long, and there is no radiation to the human brain.

Table lamp is a common electrical appliance in family life, the reason why the table lamp is not suitable for LED, mainly because people who work or rest under the table lamp for a long time will feel that the ordinary lamp tube eye protection will be better, and the light source of the LED lamp is a bit dazzling, so that the eyes will have a certain damage, and you will feel very tired for a long time.

But there are pros and cons to anything, LED lights will have bad eyesight, but its working voltage is low, power consumption is less, stable performance, long life, no infrared and ultraviolet components, high color rendering and has a strong luminous directionality, electromagnetic radiation, eliminate radiation pollution to protect the brain.

The common table lamps are mainly divided into four categories, incandescent lamps, tungsten halogen lamps, fluorescent lamps and LEDs, the four types of light sources have their own advantages and disadvantages, different people may like the light color and brightness of different light sources, mainly according to their own interests and hobbies, usually the warm light of the table lamp is the most popular.

A real LED table lamp (distinguished from the light effect, color rendering index, glare value, illuminance, luminous angle, etc.) is definitely good for the eyes.

Generally, 3W-5Wled bulb lamps are selected, and if they are high, they will feel too dazzling, and it is recommended that the table lamp choose warm white (3000K) color temperature, or natural white (4000K) color temperature.

42 pieces are more suitable.

Mainly in the lamp, the use of green and environmentally friendly semiconductor electric light source, soft light, pure color, is conducive to people's vision protection and health.

The main disadvantages of LED eye protection table lamp are as follows:

1) The quality is uneven, the entry threshold of the LED industry is low, and the quality of various LED chips varies greatly, and ordinary consumers cannot distinguish them, so the market is relatively chaotic.

2) In the initial stage, LED lighting is mainly used in large-scale landscape lighting, which is not suitable for high-eye environments, and is now mainly experimental.

3) Blue light has high intensity, blue light is harmful, and the eyes are extremely vulnerable.

4) Monochromatic light source, the color spectrum is too narrow, it will affect the optic nerve of the eye, and it is easy to get tired.

5) LED small lamp beads, after a few years of use, will slowly wear out and cannot be replaced, which is easy to cause the entire table lamp to be scrapped.

6) The color temperature is basically above 5000K, and the pure white is very bright and dazzling.

7) LED eye protection lamps with poor workmanship will produce slight flickering and radiation.

8) The adapter is generally shorter than the LED beads, and the transformer is easier.

The main advantages of LED eye protection table lamp are as follows:

1) Environmental protection: no pollution, no ultraviolet rays, no infrared rays and no thermal radiation;

2) Low energy consumption design, 150 hours of power consumption is only one degree, the table lamp in the case of providing sufficient lighting, the smaller the power, the better. The light source made of semiconductor technology has a very high photoelectric conversion efficiency, so that the power you provide can be turned into light to the maximum. DC power supply effectively eliminates additional electromagnetic loss, further reduces the overall energy consumption, and makes the power of the whole machine less than that.

3) Long-life light source, no need to change the bulb for 10 years, which is 100 times that of ordinary bulb.

4) The light source does not contain toxic heavy metals such as tungsten and mercury. Semiconductor light sources do not contain tungsten filaments in incandescent lamps, nor mercury in fluorescent lamps or energy-saving lamps.

5) Security. 12V low-voltage DC power supply; There are no glass parts that are easy to break, ensuring the safety of users. 36V is the minimum voltage that the human body can feel, and a power supply less than 36V is safe for the human body.

3C certification is not even required. DC power supply eliminates the electromagnetic radiation pollution of high-frequency alternating current.

1. From the perspective of electronic appliances:

LED table lamp, because the light source is LED, LED is a DC light-emitting device, theoretically speaking, the light emitted, and our previous generations of light source out of the light is different, the traditional light source including energy-saving lamps, metal halide lamps, incandescent lamps, etc. are AC, will follow the frequency of the input current of the civil power grid, change (China is 220V, 50Hz power grid), so the frequency fluctuation of AC makes the traditional light source appear strobe, long-term work and study under this light source will be harmful to the eyes. If you use a rechargeable battery for a table lamp, the light-emitting panel will not directly see the LED lamp beads, and the one without glare can protect the eyes. The other is the LED table lamp driven by constant current power supply, this kind of product, you don't know how to read it, or find a reputable manufacturer to buy.

Second, from an optical point of view:

When the traditional light source emits light, it will emit red wavelength light waves at the same time, which you can understand as invisible infrared rays, which can cause damage to the eyes with a wavelength of more than 780nm. The LED light source, mainly the blue light slice excitation yellow phosphor, the wavelength of the light is between 380-780nm, there is no ultraviolet and infrared, a good LED light source (note is good, most of the things you usually see in the store outside do not match, at present, the domestic such good ones are exported) The color rendering index is greater than 85 (the higher the color rendering index, the closer to natural light), with a relatively complete spectrum, that is, it also has green light waves, close to natural light, and you also know a lot of times** Myopia is all about looking at green things, because it depends on green light waves to repair the damage to the eyes, at least it will not aggravate myopia.

LEDs excite phosphors to emit light through blue light chips. Whereas, blue light has an effect on the retina of the human eye. As long as your eyes don't look directly at the LED desk lamp for a long time, it's not a big problem. The spectral ability of blue light is relatively weak. However, there is a question of biosecurity at stake here.

LED desk lamp is lit by light-emitting diode work, it works in DC state, because it does not have the strobe phenomenon of incandescent lamp, people read books because of the fatigue caused by the strobe is gone, so in this sense it is still good for people's eyes.

Personally, I think that the LED desk lamp is best not to be used by children, I saw an article on the Internet, and a parent bought a Philips LED desk lamp, but when I went home, I opened the manual and saw that it was not suitable for children. But the outer packaging says that the eye-protecting desk lamp, we ordinary people don't know the insiders, and the personal understanding of the eye-protecting desk lamp is of course to protect everyone's eyes, doesn't it include children? It can be seen that the big brands are written like this, and the small brands are for the sake of interests, of course, they will not be written in the manual.

For the sake of the child's eyes, it is better not to use it, it is better to buy a lamp with a few dozen yuan for the child.

I tend to use LED lamps as table lamps.

The three primary colors are more eye-friendly than ordinary fluorescent lamps, because of two points: first, the strobe rate is within the appropriate range of the human eye, and the eyes will not feel soreness after a long period of vision; Second, the color rendering index of the PGB trichromatic is high, which is close to sunlight.

LED lights, using automatic constant current power supply, DC method, there is no flickering at all, so this is better than fluorescent lights. However, the color rendering index is lower than that of the trichromatic lamp, between 60 and 85, and the trichromatic is 92