Why is myopia getting worse? Three ways to choose a smart learning lamp 丨 small carp smart

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As time for study assignments increases, more and more children are wearing glasses early. There are also many parents who are always worried: the myopia rate of teenagers in China has long ranked first in the world, so what kind of table lamp is eye protection? Below I teach parents and friends three methods for everyone to choose an excellent intelligent learning lamp.

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Illuminance and illuminance uniformity

Illuminance can be simply understood as whether the lamp is bright enough. Reading and writing in a dark light for a long time can easily lead to visual fatigue, which will cause myopia when it is serious; illuminance uniformity is not uniform enough. China's national standard "Reading and Writing Work Desk Lamp Performance Requirements" puts forward requirements for the illuminance and illuminance uniformity of the table lamp, and the technical specifications of cqc stipulate two illuminance levels on the basis of national standards: a grade and aa grade. With the light source as the center, the measurement range is 30 cm and 50 cm as the radius, respectively. A level: the illuminance should reach 150lx within 50cm from the light core area, and at least 250lx within 30cm from the light core area; aa level is twice that of the a-level, the illuminance level is higher, if you need to work under the table lamp for a long time, it is recommended to use a table lamp with a high illumination level. Generally, families do not have a illuminance meter, how to judge whether the illuminance is enough? Look at the nearby chain convenience stores, the general chain convenience store decoration has illuminance requirements. In our experience, the illuminance (tested 1.5 meters above the ground) of how many chain convenience stores is 300lx.

When children use reading lights, it is not recommended to only turn on the table lamp, but to open other light sources in the room as a backlight, do not cause obvious differences in light and shade in the room.

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Glare

Luminaires should have shading and no excessive glare. Anti-glare refers to the light is not dazzling, is an important indicator of the performance of the table lamp, as the light source itself, the higher the brightness, the more obvious the glare; the closer the light source position to the line of sight, the more obvious the glare. How can I avoid glare? The child sitting in the normal reading and writing position looking at the lamp, should not see the inner wall of the transmitter and the light source; must not directly use the exposed bulb, to avoid direct light. Led table lamp directly at the luminous surface, the light is not dazzling, can not see the light source (vaguely see is not good), in addition, in the choice of desktop material should also pay attention to, try not to choose a glossy desktop, will reflect the brightness of the lamp, ceiling and wall, resulting in reflective glare.

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Choose a good LED light source

LED technology is getting better and better. The LED light source using the latest technology not only meets the requirements of high color rendering, but also the proportion of blue light is significantly lower than that of conventional LED products. The most important thing about reading table lamps is light. Now the most suitable LED light source for eye protection table lamps is a full-spectrum LED based on "health lighting". The spectrum of the full-spectrum LED light source is close to the natural spectrum. Both color fidelity and saturation are close to natural light, which can illuminate the most natural colors of objects. In addition, glare is reduced, clarity and texture layering are enhanced, and the safety performance of the product is improved. No stroboscopic, anti-glare, 4000k natural light color temperature, is the majority of parents' preferred eye protection products.