Affected by the repeated epidemics, in recent years, schools across the country have taught students knowledge through the form of “stop classes” on the form of online lessons. Although it is convenient to surf the Internet class, it will inevitably be hurt for a few hours or even ten hours a day, or even a dozen hours. Therefore, various eye protection products in the market have begun to sell well. Welcome and favored by the majority of their families.
The name of the eye protection lamp is to protect the lights of the eyes. It uses blue light and ultraviolet isolation technology to use the color rendering index of 94 or more. It has a certain effect of preventing myopia. At present, there are three mainstream eye protection lights on the market: high -frequency lights, LED table lamps and DC eye protection lights.
High-frequency lights are ordinary energy-saving lamps. Use electronic inverters at work to turn 50Hz AC power into high-frequency AC (usually 30k-50kHz), and then use high-frequency AC electricity lighting. In high -frequency lights, light can change tens of thousands per second. Because the person’s eyes are too late to change, you can’t feel the change, so it is “unchanged”, which can achieve the purpose of eye protection.
The LED table lamp uses a power adapter, which is mainly used in some occasions with high requirements for light. It is not suitable for high eye environment, and because the blue light intensity is high, the eyes are vulnerable to injury. However, the LED table lamp we use daily, the lights are warm white, so it is not so hurt.
DC eye protection lights use DC ballasts to convert AC power to DC power, and use DC electric lighting to reach the light. The lights are basically not flashing. They are continuous and soft as natural light. They can avoid vision fatigue and more comfortable when using.
If you want to choose eye protection lights, you can choose from the above three eye protection lights. Of course, choosing eye protection lights is a big thing that is related to the eyes of the child. It is not enough to get a light. After determining the category of eye protection lights, we also have to look at the product performance of the eye protection light itself. At this time, we must pay attention to these five hard standards: frequent flashing, blue light, illuminance, color rendering index, color temperature.
1. Flint
Flinting is the fluctuations caused by the fluctuations of the lights. If our naked eye can notice this fluctuations, it is a flash. Long -term exposure of the eyes in this environment can cause headache and eye fatigue, cause brain cell burns, cause damage to visual cells, and continuous vision.
At present, the qualification requirements for China’s industry standards for the frequent flashes of table lamps are 3125Hz, so we should pay attention to whether there is any rinsewood hazard certification when buying. If so, you can buy it; if not, you can’t buy it.
2. Blue light
Blu-ray, also known as short-wave Blu-ray, refers to light with relatively high energy between 400nm-480nm. The blue light within the wavelength will increase the amount of toxins in the macular area in the eyes, which seriously threatens our bottom health.
According to international standards, LED eye protection lights are divided into level 4: RG0, RG1, RG2 and RG3, of which RG0 is the best blue light. When buying a table lamp, you should choose the RG0 no blue light hazard detection standard.
3, illuminance
The illuminance generally refers to the intensity of light, that is, the light irradiation range and the lightness of the light within its range. According to international standards, the optimal degree of illumination is AA level. The closer to 1, the better. The effective lighting area of this light is wide, the light is uniform, and the eyes are not easy to feel fatigue.
4. color rendering index
The color rendering index is an important method for evaluating the color of the light source, that is, the quality of lighting, is an important parameter for measuring the color characteristics of the artificial light source. It is widely used in the evaluation of artificial lighting light sources. In general, the higher the color rendering index, the better the color rendering of the light source, and the stronger the color reduction ability of the object.
The color rendering index 100ra is full score, 80ra is the pass standard, we better choose eye protection lights with more than 90RA or more.
5, color temperature
Color temperature is a metering unit that contains color components in the light. In short, it can be understood as the “warm” level of light. Different use scenarios, with different color temperature and different brightness, can have different impacts on the human body.
According to scientific statistics, the color temperature of about 5500K is suitable for dedicated learning and use; about 4000K color temperature, suitable for long-term screen reading; warm yellow light below 3000K, suitable for 1-2 hours before bedtime, making people easier to fall asleep. Therefore, it is recommended to choose the eye protection lamp with color adjustment.