- All
- Product Name
- Product Keyword
- Product Model
- Product Summary
- Product Description
- Multi Field Search
English
Views: 5 Author: Site Editor Publish Time: 2022-04-29 Origin: Site
Myopia eye protection lamp
The myopia eye protection desk lamp adopts blue light and ultraviolet isolation technology, and the color rendering index is more than 94. [1]
Incandescent lamp
The earliest incandescent lamp and halogen lamp use alternating current to generate heat through the filament and then emit light. Because the filament has heat capacity, when the power supply current changes, the change range of filament temperature is small, and the brightness change of emitted light will not be as obvious as that of fluorescent lamp, but it also has its disadvantages. The service life of bulb is generally less than 1000 hours. In addition, incandescent lamp and halogen lamp are characterized by their continuous spectrum, which is their advantage over other electric light sources.
There is also a filament with large heat capacity. Judging the heat capacity of the filament, we can see intuitively: after turning on the lamp, the lamp lights up slowly, that is, the heat capacity is large; It lights up as soon as it is turned on. It has small heat capacity. This kind of eye protection lamp using filament with large heat capacity often has two gears. First turn on the low gear to heat the filament, and then turn on the high gear. In normal use, use two gears to heat the filament first, which can effectively prolong the service life.
Although ordinary incandescent lamps have good spectral characteristics, incandescent lamps above 60W have been listed as obsolete commodities by the state due to low energy efficiency [2]. The filament temperature of halogen lamp is higher and the energy efficiency is slightly higher than that of incandescent lamp. Because its color temperature is relatively low and yellow, it is widely used in automobile headlights, hotels, auditorium halls and booths.
High frequency lamp
The AC power of China's power grid is 50Hz, that is, it changes 50 times per second. Therefore, for fluorescent lamps (fluorescent lamps) that directly use alternating current, the light flashes. The flashing frequency is 100 times / s, which is twice the frequency of the power grid. The main changes that human eyes can perceive are within 30Hz. Although the alternating changes of light and shade 100 times per second will not be perceived by us, these flashes have an impact on human eyes. If it is bright, the pupil of the eye will contract; When the light is dark, the pupil will enlarge. Therefore, direct use of AC fluorescent lamps is harmful to the eyes.
Electronic frequency converter is used in high-frequency lamps (such as ordinary energy-saving lamps) to change 50Hz AC into high-frequency AC (usually 30k-50khz), and then light the lamps with high-frequency AC. In the high-frequency lamp, the light changes tens of thousands of times per second. Because the human eye has no time to change, it can not feel the change, so it is "unchanged" to achieve the purpose of eye protection. The driving circuit of high-frequency lamp will have 30-50KHZ electromagnetic signal. Some people claim that it is harmful to human body, but there is no specific report or data proof, which needs further research and verification.
Many "eye protection lamps" on the market are actually fluorescent lamps using electronic rectifiers. To put it bluntly, they are energy-saving lamps. Its main feature is no stroboscopic, which is relative to fluorescent lamps. The eye protection lamp uses high-frequency electronic rectifier to adjust the current frequency to 30k-50khz, and the light flashing speed is very fast; Moreover, due to the afterglow effect of phosphor, the variation range of light is significantly reduced, so the human eye can hardly feel the flicker of light, and the feeling is stable. But strictly speaking, energy-saving lamps are not absolutely non stroboscopic, but small amplitude high-frequency stroboscopic. It is this feature that the light it emits is more stable and comfortable than fluorescent lamps.
LED desk lamp
Using the power adapter, the lighting is mainly used for large-scale landscape lighting, or some occasions with low requirements for light quality. It is not suitable for high eye environment, because the blue light intensity is high and the eyes are easy to be hurt. The small lamp beads are easy to wear out and have the problem of attenuation rate, which is easy to cause the whole table lamp to be scrapped. Generally, the illumination area is small and the chromatography is relatively narrow. They belong to monochromatic light sources, which will have a certain impact on the optic nerve, which is relatively dazzling. However, led table lamp also has its advantages. Compared with electronic components, the cost of the whole lamp is low. The color temperature of LED lamps includes warm white (a little yellow, about 2700-3000k), positive white (4500-6500k) and cold white (6500-12000k). The cold white LED is relatively dazzling.
DC eye protection lamp
Using the DC ballast, by first transforming the AC into the DC with stable voltage and current, and lighting the lamp with the DC, there is basically no stroboscopic, and the light emitted during use is the same as the natural light, which is continuous and uniform light, very soft, which can avoid visual fatigue, and solve the stroboscopic problem of the fluorescent lamp of the electric ballast; Due to the use of DC technology, there is no AC fluctuation, and the electromagnetic interference signal caused by electronic ballast is avoided. However, the process of DC eye protection lamp is difficult and the cost is high, so many enterprises are unwilling to adopt this technology.
We recommend two eye protection ： H6 lamp and H5 lamp
