Open term to a year again, desk lamp is indispensable to children, the Lin Lin on market always total desk lamp lets guardians brows tightens a lock, be at a loss. For the children that assimilates intellectual nutrition day and night to passing study, choose good to desk lamp, protect good eye, ability sees farther future. But which " the lamp that shield an eye " is quality better? Where money suits your home child more?
In August 2018, supervisory bureau of Shanghai quality technology is famous to 28 of the sell like hot cakes on market read write undertook detecting with desk lamp. Test brand includes: The consumer such as illume of general of flying benefit riverside, Europe, good eyesight, Yeelight is hep brand. The price distributings on, the product covered high school cheap, among them, the price 200 yuan of the following desk lamp 3 batch, 200 yuan, 500 yuan of desk lamp 13 batch, desk lamp of 500 yuan of above 12 batch.
Sample of this second quality evaluation gives birth to content safety from light, twinkle, 4 main index undertook index of grade of intensity of illumination, general colour developing detect. Too professional inconvenience is written down, irrespective, small make up an end of 4 main index to be 6 words -- " safe, comfortable, true " .
Check result discovery, yeelight, pine falls and child inspect 3 products such as treasure its La Guang, intensity of illumination all reach top quality order and degree, and indication index is as high as 95 above, performance is superior.
Notable is, bright base, fine shines and these 3 blue smooth harms achieve Lei Shi low danger level, ou Silang, Lei Shi, bright base, protect child wait for intensity of illumination of 11 desk lamp to did not achieve class A, among them, 1 small index of colour developing of 2 man desk lamp has 70.8 only, can make object color shows lack fidelity.
Reflect index: Retinal La Guang is endangered
Conclusion: Performance of blue light of 25 desk lamp is superior, do not harm an eye!
Parents most " Wen Zhi color changes " the La Guang of desk lamp of nothing is more... than, think commonly now, too strong blue smooth meeting causes loss to the retina of person eye. Actually La Guangpu alls over consist in beside our, there is La Guang's share among the sunshine of nature. In addition, among light of computer of blue smooth extensive still consist in, mobile phone, TV, neon lamp, car.
International illume learns to endanger retinal La Guang cent to be 4 grade: Without danger kind (RG0) , low risk kind (RG1) , moderate risk kind (RG2) with high risk kind (RG3) .
▲ La Guang detects
The result shows, in 28 desk lamp, child those who inspect treasure, Yeelight, beauty, the 25 retinal La Guang such as Europe general illume is dangerous grade does not have dangerous) for RG0 (; And bright base, fine shines and dangerous grade of 3 desk lamp is Lei Shi) of RG1 (low risk.
The expert unscrambles:
The Shanghai quality that is in charge of evaluating a project this supervises examine senior engineer Yang Yue indicates level of technical academy professor:
GB/T 9473-2017 " read function of writing job desk lamp to ask " in stipulated La Guang endangers a category to should not exceed RG0, it is dangerous that proposal children and teenage proposal choose RG0 (to not have) product.
Nevertheless consumer need not fear the La Guang of desk lamp is endangered too, the distance of blue smooth harm and eye is concerned, further from human body, the harm is less. Because because can move at will,read writing job desk lamp, accordingly, the parent should notice to maintain the distance of desk lamp and child, do not leave too nearly, and orthoptic illuminant does not exceed 100s, won't cause retinal La Guang to endanger likewise.
Keyword 2: ComfortableReflect index: Twinkle, grade of intensity of illumination (shading sex, intensity of illumination and uniformity of intensity of illumination)
Conclusion: Intensity of illumination of 11 desk lamp did not achieve class A, cause visual exhaustion easily
Besides La Guang, parents still should notice to twinkle (frequency shines) , intensity of illumination and uniformity of intensity of illumination these 3 index.
▲ frequency shows a test
Intensity of illumination can understand simply to shine quite for the lamp, numerical value has been jumped over greatly more. And uniformity of intensity of illumination is illumination quite even, numeric Yue Xiaoyue is even.
GB reached uniformity to make a demand to the intensity of illumination of desk lamp, cent is mixed for A AA two grade. AA level is higher than class A requirement on intensity of illumination.
The result shows, yeelight, child inspects treasure, pine to fall, these 5 desk lamp achieve Annaite and flying benefit riverside AA class, ou Silang, Lei Shi, bright base, protect child wait for 11 desk lamp to did not achieve class A.
▲ intensity of illumination checks (use a figure)
2017, supervisory bureau of Shanghai quality technology also has undertaken to 45 desk lamp quality is evaluated, at that time, only a desk lamp achieved the requirement of AA class. than below, the quality of desk lamp product on market already had bigger promotion this year, demonstrative production company already had in the consciousness of this respect very big strengthen.
Reflect index: Index of general colour developing
Conclusion: Index of colour developing of 10 desk lamp is outstanding, a product under 80.
Index of general colour developing is the target that represents colour authenticity, index of general colour developing is higher, state the object color below this kind of lamplight is close to true color more.
Index of colour developing of ▲ Zun Tu is high, color is truer
In 28 desk lamp of this second evaluation, the colour developing index of 10 desk lamp shows scene, especially child look the tablet of home made product such as children of treasure, Yeelight, LEDISUN, Tecent, Da Lun, colour developing index is as high as 90 above, assuming entrance brand. Be worth what carry is, small index of colour developing of desk lamp of 2 man brand is only 70.8, under the requirement of Ra 80.
The expert unscrambles:
Shanghai quality is supervised examine engineer of class of technical academy professor, quality of source of national light produced by electricity is supervised examine center (Shanghai) vice director Yang Yue, in unscrambling desk lamp for everybody " bogus concept "
(1) " the lamp that shield an eye "
Actually the country did not give out at present to protecting eye lamp standard and limit, "Shield an eye " a kind of hype that is a businessman only and sale shift. The so called lamp that shield an eye, read the lamp namely actually, formal name call his " read write with desk lamp " or " visual work desk lamp " .
(2) " shine without frequency "
All illuminant that use alternating current source works can arise twinkle (namely the frequency that people often says shows) , so, "Shine without frequency " desk lamp is nonexistent also.
(3) " the mobile phone measures frequency to shine "
Socially wide examine desk lamp to whether have to circulate one kind is photographed with the mobile phone like the head " frequency shines " method. Actually, this kind of method does not rely on chart, because the mobile phone is photographed,resembling a head work through CMOS progressive scanning, if time of mobile phone shutter is less than 1/50s, frequency shows unqualified desk lamp to meet those who have water ripple to appear, but the mobile phone leaves shutter time from movable mould type match automatically, and setting of different mobile phone is differ, because this brings about a result not identical. Although mobile phone test goes out " frequency shines " , but desk lamp is possible also eligible.
1.Choose La Guang to endanger the desk lamp that is RG0, the retinal La Guang that can pay close attention to desk lamp to go up endangers grade.
2.Choice intensity of illumination has the desk lamp with AA nominal class. If need,work for long below desk lamp especially, recommend the desk lamp that chooses level of tall intensity of illumination in order to protect vision.
3.Choose the desk lamp with colour developing high index, parents are in when be desk lamp of child choose and buy, colour developing index should is more than commonly 80, if want to do a picture to draw such is opposite below desk lamp,colour asks high a few issues, index of colour developing of proposal choose and buy is more than the product of 90.
4.When use desk lamp reads a book to write, should open a room at the same time inside other lamps and lanterns, build easy smooth space environment, prevent the lighting system with comparative and strong light and shade.
Do not have a kind of lamp to be able to protect an eye truly, protecting what the eye needs is right amount outdoors motion, good the luminous environment that reads habit, enough nutrition and safety. Detailed test result but stamp [Http://www.shzj.gov.cn/art/2018/8/30/art_2402_1324183.html] read!
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