there is no no blue light led lighting in the world
Like high-energy blue light like ultraviolet light, absorb too much will cause damage to the human eye. The LED can produce blue light, just the harmful light in the blue light. The human retina is a self-repair function, but the absorption of harmful blue light is too strong, the repair capacity will be permanently damaged, leading to irreversible degradation of retinal function. Conclusion Put the front:First, the world does not “no blue light” LED lights, known as “no Blu-ray” do not buy;Second, the blue part of the band of harmful light, some bands for the benefit of light;Third, buy LED lights Note: must be opaque shade block light-emitting chip; single luminous chip power can not exceed 1w;Fourth, the family has infants and young children, must pay attention to not let him look directly at the light source;5, high-frequency blue light on the eye injury is irreversible.LED also known as light-emitting diode, is a solid-state semiconductor devices. LED itself is issued by the blue, in order to make LED lights can be used to issue white light, it is necessary in the lighting devices and wafers, smear a layer of yellow phosphor.High-energy blue like UV, like absorption will cause damage to the human eye. The LED can produce blue light, just the harmful light in the blue light. The human retina is a self-repair function, but the absorption of harmful blue light is too strong, the repair capacity will be permanently damaged, leading to irreversible degradation of retinal function.National optical radiation safety and laser equipment standardization technical committee initiated the 12 domestic famous manufacturers of 39 products for optical radiation safety performance test.The national standard will be LED light biological radiation safety rating is divided into four levels: exempt category (RG0), low-risk category (RG1), moderate risk categories (RG2), high-risk categories (RG3). In addition to exemptions on the retina basically no harm, all other types are will cause harm.experimental method:According to the international photobiological safety evaluation standard, the effective brightness of LED blue light and thermal radiation hazard was measured with 7mm diameter of human eye pupil by using the instrument to simulate the light biological structure of the human eye.Experimental results:Exemption category (RG0): 21 samplesLow Risk Class (RG1): 12 samplesModerate Hazard Class (RG2): Six samplesIn other words, regular manufacturers of products, nearly half of the damage with blue light.There is no “no blue light” LED lighting in the worldGB requirements, low-risk category, moderate-risk lamps should be marked on the packaging, “This product has a blue light hazard, do not look at the lights lit,” the warning language, and mark the safe use of distance. But this experiment detected low-risk and moderate-risk lamps, not a warning sign.Daily use of lamps and lanterns, should be exempted from the class or low-risk lamps. The national standard, children with lamp, must be exempt or low-risk category. In this test, a child with table lamp samples for the actual results of moderate risk.According to experts speculated that the sample safety level exceeded the reasons may be:1, the light source directly exposed, but not blocked with opaque shade, so that the light is more soft;2, a single chip power, light is too strong;The use of the surrounding environment if the lamp is relatively dark, the human eye pupil will be enlarged, then use high-brightness lighting, resulting in the reading environment and the surrounding environment contrast is too strong, make the eyes absorb too much blue, harmful vision.Therefore, the use of reading lamp, it is recommended to re-open the house a low-brightness lighting, reduce the brightness contrast.It is worth mentioning that the national standard of the security level is based on the impact of ordinary adults divided. The infants and young children eyes transparent, born within a few months will not be independent of the light intensity of the eyes to avoid, too much light on his greater harm, we must carefully choose to use exempt category lamps.At present, China’s LED lamp manufacturers have nearly a thousand, GB Although the security level of the LED lights were divided, but there is no mandatory implementation of standards, resulting in a lot of products on the market does not strictly enforce the provisions of GB. In the first half, Nanjing Consumers Association on the market sales of 37 brands, a total of 42 samples for testing, the results of a standard.Therefore, in the choice of lamps, in addition to the formal channels, the purchase of big brands, consumers have to learn to determine whether the lamps meet safety design.In addition to lamps, mobile phones, tablet PCs, LCD monitors, LED displays, can issue high-energy blue.Blu-ray part of the same with the UV, are harmful blue, is 415 nm -455 nm high-energy blue. Because the sun also has this kind of similar to the high-frequency ultraviolet blue light’s sake, in the past people generally have to age the cataract, but now more and more young cataract, the main reason is over-reliance on mobile phones and electronic products caused.
There is no “no blue light” LED lighting in the worldAnimal experiments have confirmed that high-energy blue light can penetrate the human eye lens, direct access to the bottom of the macular area, resulting in macular disease, and then blindness. The initial symptoms are: red-eye, dry eyes, eye astringent, decreased vision, fatigue.There is no “no blue light” LED lighting in the worldExperts point out that the light damage to our eye is mainly a chronic process, first shown in the fuzzy things to see, followed by continuous blue light damage will gradually decline in vision, or even loss of vision. Therefore, the terrible harm to Blu-ray is that it is invisible, pain does not itch, unknowingly harm to our vision. The shorter the wavelength, the greater the damage, over time, resulting in a number of eye diseases.
Scientists also found that the degree of damage to the eyes of blue light will vary because of age, because older people, the crystal becomes yellow with age, or even yellow and can be part of the blue light. As the article said above, children sensitive to strong blue light, more likely to cause visual cell damage, affecting vision, resulting in vision loss, or even eye disease. Usually, the one-year-old pupil the largest, including blue light products through the eye injury macular damage rate of 100%, two-year-old pupil smaller, with blue light products through the eye injury macular damage rate of 70% – 80% To the six-year-old pupil smaller, with blue light products through the eye injury macular damage rate of 60% – 70%, so the same blue range, the infants and young people will be greater damage.This is undoubtedly a warning to all parents, if the harm does not pay attention to blue light, blue light on the children’s injury will be irreversible.There is no “no blue light” LED lighting in the worldHowever, high-energy blue light is harmful, but not all blue light is harmful. The low energy portion of the blue light is also the beneficial light of the human eye. This feature requires anti-Blu-ray glasses not to block all the Blu-ray, but not only to block the harmful blue, but also let the useful Blu-ray.