I’m sure many of you have noticed that the age group for myopia is getting lower and lower, and children just entering kindergarten can wear a pair of big eyes, which is both cute and pitiful. The reasons for this are actually quite simple and varied, often caused by looking at mobile phones, playing games and incorrect eye use habits, but more importantly, caused by children not using lights correctly when reading or writing homework.
Many people, especially parents, think that the brighter the lamp, the better it is for their child’s reading and writing work, but it is not!
This is because brightness is not the test and measure of a qualified desk lamp.
To measure a qualified desk lamp, the main thing is to choose one that is “eye friendly”, which should meet the following requirements.
1.Low blue light
In 2010, at the American Congress of Ophthalmology (ARVO), Dr. Denny’s published the results of an alarming survey by ophthalmologists: the vast majority of lighting on the market contains “blue light”, which is extremely harmful to the eye, and long-term reading under harmful blue light can lead to myopia, computer syndrome, cataracts and even blindness! Doctors warn that “blue light” is even more damaging to children’s eyes!
What is blue light?
Blue light (HEV) is a high-energy visible light that can directly penetrate the cornea and lens and reach the macula, accelerating the oxidation of cells in the macula and causing photochemical damage to the retina. The sun, fluorescent tubes, computers and LCD monitors all contain blue light (HEV) and as a result, blue light (HEV) has been proven in studies to be the most harmful form of visible light.
If you are concerned that the LED lamp or other electrical appliance you have purchased has an “excessive amount of blue light”, you can determine whether the blue light from LED lamps is excessive according to the National Standard GB/T 20145-2006 / CIE S 009/ E: 2002 (Photobiological safety of lamps and lamp systems) –The standard gives an upper limit for the luminous flux of blue light at a given spatial angle.
Generally speaking, blue light above 0.2 is considered high blue light.
So when buying a table lamp, make sure you choose one with low blue light.
2.No strobe
Strobe is extremely likely to cause visual fatigue, dizziness, eye discomfort, serious headaches, vision loss and other problems.
The most direct way to test whether there is a strobe is to open the phone camera to the lamp light source, if the phone screen does not appear a flash of dark lines on behalf of the strobe-free, dark lines flow pleasantly so the more serious the strobe.
3.Soft light
What is soft light? On a normal day, we see the daylight colour temperature is about 5600K, and the direct sunlight at noon about the same, but for desktop reading, the high side of white, so the eyes are easily fatigued.
The best light, 1-2 hours after sunrise, has a colour temperature of around 4000-5000K. The light in this colour temperature range is comfortable, soft and good for reading and writing. Generally speaking, if you want to read within this range, choose a slightly higher colour temperature, while writing requires a relatively low colour temperature.
4.Illuminance and lighting range
Desk lamp light intensity detection: the light source centre from the reading and writing desk height 400mm at the light level in 750-1500 Lx when the best visual light environment. In general, simply from the illuminance value, below 500LX desk lamp is not qualified, its lighting brightness is low, can not be used as reading and writing lighting.
The illumination range, or the area that the light from a desk lamp usually shines on, is generally referred to. With a typical desk lamp, the illumination range is usually around 55cm, which is the size of a magazine, which is not enough for students to read or write. If the illumination range is too low, it tends to cause people to sit incorrectly, causing problems such as hunchbackedness and easy myopia.
Generally speaking, in order to create a good and comfortable lighting environment for reading and writing, the illumination range of a desk lamp should not be lower than the size of two books, which ensures that the person is at the most comfortable height for reading and writing.
Ergonomically speaking, the light from the circular light source is most suitable for reading, and the 16:9 light distribution is designed to best suit the visual ratio of the human eye.
5.Buy a USB table lamp
Always running out of outlets? Newer lamps are sold with USB ports near the base so you can plug in your tablet or smartphone and charge it while you’re in bed or relaxing in your living room. Buy a USB table lamp if you want to easily charge your electronic devices.
This is a great option if you hate having cords stretch from the wall to your bed or seat.
