Is the light fixture better and brighter? What kind of light environment is good for eye health? Experts point out that parents, teachers and light source manufacturers all have the responsibility to popularize the knowledge of scientific consumption of light sources, and should be suitable for the health of students and illuminators. Energy-saving and environmentally friendly lamps without radiation or stroboscopic. Phenomenon 1: LED lamp price is difficult to choose: Expert: Mo buy 5W bulb below 20 yuan It is reported that when consumers buy LED indoor lights in the lighting market, they often see confusing phenomena: a well-known brand 4W LED bulbs are priced at 40 yuan, while some unknown brands 5W LED bulbs It only sells for 20 yuan. Which of the two bulbs should be selected? Many consumers told reporters that they are more inclined to choose a brighter LED bulb. It is understood that because the higher the color temperature, the higher the light efficiency, the brighter the LED interior light looks. However, in actual use, the low color temperature looks more comfortable and the corresponding cost is higher. Take sunlight as an example. In the morning and evening sun, the color temperature is between 3000K and 3500K. It looks softer. At noon, the color temperature of the sun rises to 4000K to 4500K, which is quite dazzling. The color temperature of incandescent and fluorescent lamps has reached 6200K. The reporter learned that the bulbs produced by regular domestic manufacturers will indicate the color temperature on the package. The commonly used color temperature is 2700k, which is the color temperature of ordinary incandescent lamps. It is characterized by warm light but not bright enough for bedroom bedsides, wall lamps, etc. Local illumination; 3000k is the color temperature closest to natural light, is warm light, the light is warm and bright, suitable for the overall lighting design in the home; 5000k or more is white light, is a cool color light, can make people concentrate, suitable for office, study and other places use. Experts say: At present, in the lighting market, the power of general household LED indoor lights is between 3W and 7W, and the market price of 5W or so bulbs is generally around 50 yuan. If it is lower than 20 yuan, then LED indoor lights Quality is definitely a problem, not only can not protect the vision, and the life of the light source will be greatly shortened. In addition, when consumers buy LED indoor lights, they can't just look at the power of the lamps, because LED lamps are not as bright as possible. Phenomenon 2: Inferior LED lights have blue light hazard? Experts: Mo is cheap, want to buy big brands From incandescent lamps to energy-saving lamps to LED lights. In recent years, society has paid more attention to energy-saving lighting products than ever before. In this regard, some medical professionals and electric light source experts have pointed out that many LED lamps have serious blue light overflow problems, which will cause irreversible damage to the human retina. LED lamps really have damage to vision? Associate Professor Zhang Shanduan, deputy director of the Institute of Electric Light Sources at Fudan University, told reporters: "The principle of white LEDs is the white light formed by the blue LED chip to stimulate the conversion of yellow phosphors. The blue light hazard refers to the light source. If the brightness is too high in the 400-500 nm blue-light band, the eye may cause photochemical damage to the retina after long-term direct view of the light source. The degree of blue-light hazard depends on the amount of blue light received by the human eye under the light." "If you buy qualified lamps and use them properly, LED lamps are no more dangerous than traditional lamps." Industry insiders pointed out that at present, there are more than 3,000 domestic LED lamp manufacturers, China's national standard "lights of lamps and lights" In Biosafety, the calculation method of blue light hazard and quantification is clearly defined, and it is pointed out that there is no difference between LED lighting products and other light sources, which is within the safety range specified by the exposure limit. Experts say: Professor Tong Tongsheng from the Department of Optoelectronic Engineering of Zhejiang University said that internationally, according to the intensity of blue light, light biosafety standards for blue light have been established, and the possible blue light hazard values ​​have been set. For example, a light source product that does not have a blue light hazard is called a “zero-type productâ€; a product that has a small blue light hazard and whose eyes cannot directly look at the light source for a long time is called “a type of productâ€; a light source with a large blue light hazard is called a light source. "Two types of products." Currently used as the basic zero class and class of LED lighting, if it is the second class, it is mandatory to be "eyes can not stare at." Therefore, when purchasing LED lamps, don't be tempted to buy cheaper products. Try to buy big brands. Phenomenon 3: The quality of eye protection lamps is uneven? Experts: Buy 3C logo Table lamps are an indispensable tool for adults and children to learn and work. In order to prevent myopia, choosing a good eye-protection lamp for children has become a problem that many parents consider. According to the reporter's understanding, there are a lot of eye-protection products on the market. Many products are advertised as "no stroboscopic" or high-tech LED lights, and the price is much higher than ordinary lamps. Can these lights protect the child's eyes? The author visited the table lamp area of ​​several supermarkets and saw that half of the table lamp products on the display stand were children's special "eye-protection lamps". The prices of these products are uneven. It is also a table lamp with a table lamp with the words "eye protection". Relatively speaking, it is several hundred dollars more expensive than ordinary table lamps. And some LED "eyes", the price is even higher. The author observed that the table lamp placed on the shelf, the table lamp without the "eye protection" function, the price ranged from 80 yuan to 300 yuan; and the lamp with the "eye protection" function, the cheapest price was 300 yuan. Expensive is even about 900 yuan. The reporter also found that in addition to the price difference, many "eye-protection" products have no relevant "3C" certification mark. Experts say: "eye protection lamp" is currently a marketing concept, whether there is "eye protection" effect is not certain, consumers in the purchase process, should pay attention to view the safety certificate and instructions, it is best to choose products with after-sales service, and Pay attention to the 3C certification mark of the product. Children's room light source design has a coup The study found that long-term use of "foot-light" lamps is one of the factors leading to high myopia rates among adolescents in China. If the brightness of the luminaire is much higher than the brightness of the indoor environment, people will be dazzled. It can be seen that the brightness of the luminaire is not equal to the light, too bright will damage the retina. How can we make our children live in a relatively safe light source environment? Take a look at the safety measures provided by experts: 1. Different designs in different areas. The children's room has many functions such as games, learning, sleep, etc. The function areas are different and the lighting requirements are different; the light intensity and area of ​​the game area can be slightly larger. The light intensity in the study area can be moderately concentrated. The light in the sleeping area should be as soft and warm as possible, which helps the child to feel safe and help with sleep. 2. Avoid unbalanced lighting. One is too bright and the other is too dark, which is an uneven design. Therefore, in addition to the main light source, some auxiliary light sources (such as wall lamps, floor lamps, table lamps, etc.) can be set to adjust the light difference in the room by the intensity of the light, the spatial position and the angle, thereby relieving the child's eyes. Fatigue and discomfort. 3. The reflected light should be upwards. If you want to use indirect reflected light as ambient light, be careful to let the lamp cover reflect light upwards as much as possible, and do not reflect downward. Because the downward reflecting light source may direct the light to the child's eyes, it will damage the child's vision. 4. Use spotlights with caution. If the spotlight is not used properly, it will cause the child to be nervous. If you want to use spotlights to illuminate artwork on the wall (such as a picture frame), avoid glare. Therefore, when lighting, it is necessary to shoot from the side to the artwork, the light comes from the side, and the dazzling highlights are not directly reflected on the human eye. 5. Select an adjustable luminaire. It is best to choose lamps that can adjust the brightness and angle, and dim the light at night to increase the child's sense of security and help the child fall asleep as soon as possible. After the child falls asleep, be sure to turn off the light. Because the child sleeps under the lamp, vision is impaired, and the rate of myopia is much higher than that of the child who falls asleep in the dark. Editor: Yingzi Panasonic Insertion Machine Parts
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