Of adolescent myopia in our country is more and more attention, the classroom is a place where students stay for a long time, if not ideal of the classroom will affect the students' vision, in child and adolescent myopia prevention and control of the comprehensive implementation 'mentioned in the transformation to the classroom:' in strict accordance with the ordinary primary and secondary schools, secondary vocational schools construction standards, the implementation of the classroom, dormitory, library (
The reading room)
Such as led
lighting and requirements, use good for eyesight health equipment.
To speed up the eliminate the phenomenon of 'large amount'.
School classroom health standards for success rate 100%.
'In addition, GB/T36876 -
2018 primary and middle schools in the regular classroom design installation requirement 'and' technical specification for primary and secondary schools have on campus to improve related requirements of lamps and lanterns.
Below, we will analyze the traditional classroom lamps and lanterns will which influence on students' vision, color temperature, blu-ray: most generally adopt high colour temperature (in the classroom
6500K)
Fluorescent tube, the light color is too white, and blue components, easy to cause the students excited, fatigue, and even cause insomnia.
Classroom eyecare LED lamps and lanterns has the following advantages: 1.
Intensity of illumination and the intensity of illumination evenness optimal: national standard GB7798 -
2010 rules, the classroom desk surface maintain plane illumination 300 or higher, intensity of illumination evenness 0 or higher.
7, to maintain the blackboard 500 or higher, the average illuminance on the intensity of illumination evenness 0 or higher.
8.
2.
Anti glare: gb regulation, the classroom
led lighting glare value & lt;
19, while most of the school classroom led lighting using simple fluorescent stents, the light source directly exposed, the light is very dazzling, glare value more than 22.
So that the eye muscles too nervous, the serious influence students' concentration in class.
3.
General fluorescent lamps and lanterns USES ac power source, current do periodic changes over time, the flashing of 100 times per second, lead to an unstable lamp brightness, learning under the stroboscopic light source, the visual system need to constantly adjust the size of the eye pupil to protect the stability of the light intensity and retinal imaging resolution, long time in this kind of light environment study, must make the pupil muscle fatigue due to excessive use.
4.
And blue light, and other harmful light: common LED light source of high frequency short wave - 400
Between 500 nm blue light, arrive to directly penetrate eye fundus macular ward, cause irreversible damage to the eyes, such as the formation of myopia.
The traditional led besides blue light damage, heat and uv, near ultraviolet, photochemical retinal, weak stimulation, small light source, infrared radiation of seven kinds of harmful light.
The 7 kinds of harmful light in different extent, serious harm to our eyes and body.
5.
Droop, prolong service life, lamps and lanterns of normal use after six months would be a serious light attenuation, cause the luminous flux decreases, which can not meet the national standards for, the brightness of the current in order to maintain standards, thus replacing the cycle for 2 to 6 months of lamps and lanterns, and need relevant maintenance personnel long-term maintenance, high maintenance cost and resource waste.
6.
Color rendering index optimization: ordinary fluorescent spectrum is not complete, resulting in lack of color and color.
Far less than the national standard Ra 80 or higher, and the colour of lamps and lanterns reduction ability is bad, will directly affect a child's color vision.
7.
Color temperature comfortable: national standard regulations, color temperature is 3300 -
5300 k, and the actual measurement results reached 6500 k color temperature is too high will lead to rising rates of radiation, blue blue also will increase, the blue light will increase due to genetic, environmental nutrition, health habits and old age related macular degeneration.
Night lessons for a period of time off will affect the students in melatonin secretion, reduce the sleep quality and influence on the second day of learning efficiency.
8.
Boycott fluorescent related hazards: fluorescent tubes containing heavy metal materials such as mercury, phosphor, mercury and phosphor if improper safekeeping and disposal of heavy metals, will do great harm to ecological environment, he can in a variety of forms into the ecological environment, pollution of soil, air and water directly.
Again through the food chain enter human body, directly harm the human body health, and fluorescent lamp luminous efficiency is low, general fluorescent lamp is only 50 lm/w.
Although fluorescent light is 365 degrees, but its basic there is no light in the opposite direction, although the reflected through the chimney, but the reflection efficiency is low, energy consumption is too high.
Of the fluorescent lamp ballast will emit sound that is harmful to the body.
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