- 发表时间：2017-06-19 06:06
According to Reuters on May 16, the Jiangsu provincial associations publish reading lamp test results. 173 in the batch table lamp, meet the requirements of all the indicators are only 3 batches, more than 80% lamp color temperature is too high, can affect a person’s vision health.
Comparative test of the 173 batches, LED table lamp, 130 of which, fluorescent light source lamp, 29, incandescent bulbs (halogen tungsten lamp) light source, 14, from entities throughout the Jiangsu market and cat, Jingdong, suningyi, the three network channels. Comparison test according to GB/T9473-2008 technical requirements of the read and write operations table lamp, GB50034-2013 of the architectural lighting design standards and other related requirements, power cord length, opacity, color temperature, color rendering, photometry requirements of five technical standards for testing.
Test results show that 173 lots of lamps all items are in conformity with the relevant requirements of just 3 batches, respectively, is bought in Hexi, Nanjing, Wanda Plaza, King called the Nanjing zhixueku ZD-02 LED eye lights, cat nominal purchased Philips Lighting from Philips (China) Investment Corporation Philips FDS632 Shu lamp production, Cats on the day Dr Edward flagship store to purchase the nominal as well, by Shenzhen Kang networks technology development co and American vision care Association developed Edward LTS-980-02-61 Angel’s sleek eye lights. Other 170 batches of lamps are in substandard conditions in five performance indicators.
In accordance with the relevant standards, read and write operations not more than 4000K the correlated color temperature of the lamp, high temperature can affect the comfort, may cause damage to vision if it is more than 6500K. The color temperature of the lamp test result is not satisfactory, with 4000K as a point of reference, only 30 batches of lamp color temperature does not exceed this standard, in other words more than 80% the lamp exceeds this standard, color temperature is too high. The comparison also has 21 batches of color temperature of the lamp than 6500K. Worth noting is that in suningyi long lamp store to buy a nominal amount of DP long long company limited production from Guangdong LED670 lamp color temperature as high as 11643K.
Color-rendering index of the light source is too low will not be able to correctly display the color of an object, has a great impact on comfort, easy to form the Visual fatigue, damage eyesight. According to the relevant standard, LED color rendering index RA shall not be less than 80. Comparative test of the 71 lots of lamps in general color rendering index RA did not reach 80. Including 12 batches of lamps in general color rendering index RA even 70 does not meet.
Error: “name” as “functions”.
“Eye on the light” is a common name, country and not on the function of eye lamp to read and write the introduction of specific criteria, and its eye lamp performance is not strictly scientific reasoning, lack of clinical proof. Eye protection desk lamp on the market today is no scientific basis for this call, saying from the science, regardless of light reading, will not be relaxing to the eye.
Myth: “no Flash” of water.
Eye protection desk lamp on the market’s biggest selling point is no Flash. In fact, the basic principle of most eye lights on the market, is the oscillation frequency of fluorescent lamp, by the low frequency flashing up to high frequency flashing, can’t tell Flash to the naked eye, but even the naked eye cannot feel, there is a strobe, and high-frequency lamps produce high-frequency electromagnetic wave, if long-term use at close range instead of health.
Real flicker free operation, only use DC ballast, by alternating smooth direct current into voltage, current, electric lighting, which process is difficult and high cost.
While need note of is in national introduced of read and write job lamp performance requirements standard in the does not on so-called of frequency Flash problem proposed requirements, instead is in standard description in the clear proposed, “currently, high frequency flashing (is greater than fusion frequency of flashing) effect Visual research of work results is cannot certainly by high frequency of light stimulus caused retinal neural of response will effect any perception or motor of Visual function, so this standard not will flashing included lamp of technology requirements”.
Myth three: the pursuit of “high brightness”.
Many consumers in select lamp Shi, to bright, and see have clear for standard, pursuit “special bright clear” feel, actually this is a errors of concept, in existing of technology conditions Xia, lamps in significantly improve as degrees of while, and harmful reflective of brightness also will was significantly of raised, will on with lamp who eyes of corneal and Iris caused damage, and inhibit retinal photographic cell function of play, to introduction visual fatigue.
Myth four: “LED lights” more high-quality.
In recent years, as a new lamp LED, with its environmental protection, low power, high efficiency, long life, won the majority of consumers love and recognition, a LED is the high end, must be the illusion of quality. In fact, since most LED lights white LED, designed more susceptible to direct glare. If there is no light angle, grille and lens glare measures will not only produce glare, also reduces the Visual function, is not conducive to reading. It is important to note, and read and write existing lamp standards, applies only to distributed light is tungsten (incandescent) and tubular fluorescent lamps, LED lamps currently not included in the standard.
LED lamp quality remains mixed for the current market is a common problem, some poor small power LED lamp used as a light source, its power is not enough, not up to sufficient illumination. If used as bedside lamps, night lights, illumination requirements is not high, may have little impact. But when used as a reading lamp, insufficient illumination can accelerate eye fatigue, is not conducive to protect vision.