What are the requirements for high-quality classroom eye protection lights
my country is paying more and more attention to myopia in young people. Classrooms are the places where students have long been waiting for. If the lighting in the classroom is not ideal, it will affect the eyesight of students. The improvement of classroom lighting is mentioned in the "Comprehensive Prevention and Control of Children and Adolescents Myopia Implementation Plan":
"Strictly follow the construction standards of ordinary primary and secondary schools and secondary vocational schools, implement lighting and lighting requirements for classrooms, dormitories, libraries (reading rooms), etc., and use lighting equipment that is conducive to healthy eyesight. Speed up the elimination of the phenomenon of "large classes". School classroom lighting hygiene The standard compliance rate is 100%."
In addition, GB/T36876-2018 "Hygiene requirements for the design and installation of general classroom lighting in primary and secondary schools" and "Technical specifications for lighting in primary and secondary schools" also have related requirements for the improvement of campus lighting.
Next, let’s analyze what effect traditional classroom lamps have on students’ vision:
Color temperature and blue light: High color temperature (6500K) fluorescent tubes are generally used in most classrooms. Because the light color is too white and the blue light component is too much, it is easy to cause students to become excited, fatigue, and even cause insomnia.
Stroboscopic: When an ordinary desk lamp is working normally under a 50 Hz alternating current state, it will flicker about 100 times per second. Such a high flicker frequency is invisible to the human eye. Stroboscopic has a great impact on vision. Students' visual system adjusts frequently in order to adapt to changes in frequency, causing visual fatigue. Over time, coupled with careless eye hygiene, it is extremely prone to myopia.
Glare: Some classrooms are directly installed with exposed fluorescent tubes. While watching the blackboard, students are affected by the direct glare of the tubes, which makes it difficult to concentrate, which reduces learning efficiency and is prone to visual fatigue, which can easily lead to myopia in the long term.
The LED classroom eye protection lamp produced by Benwei Lighting has the following advantages:
1. Excellent illuminance and uniformity of illuminance: According to the national standard GB7798-2010, the classroom tabletop maintains flat illuminance ≥300, illuminance uniformity ≥0.7, blackboard maintains average illuminance ≥500, and illuminance uniformity ≥0.8. As of the end of 2018, more than 90% of the illuminance and uniformity of all the classroom lights in the 10,000 primary and secondary schools that we have renovated did not meet the requirements of the national standard. Even the illuminance of some school desks and blackboards is only more than 100 lux. Students studying in such a light environment for a long time can easily cause eyesight fatigue and cause myopia.
2. Anti-glare: The national standard stipulates that the glare value of classroom lighting is <19, and most school classroom lighting uses simple fluorescent lamp brackets, the light source is directly exposed, the light is very dazzling, and the glare value exceeds 22. As a result, the eye muscles are too tight, which seriously affects students' ability to concentrate in class.
3. Generally, fluorescent lamps use AC power, the current changes periodically with time, and 100 flickers per second, resulting in unstable light brightness. When learning under a stroboscopic light source, the visual system needs to constantly adjust the size of the eyeball pupil. Protect the stability of the retinal light intensity and the sharpness of the image. Studying in this light environment for a long time will inevitably make the pupil sphincter tired due to overuse.
4. Anti-blue light and other light hazards: The high-frequency short-wave blue light between 400-500nm in ordinary LED light sources can cause irreversible damage to the eyes, such as the formation of myopia, to the macular disease area that directly penetrates the eyeball to the fundus. In addition to the blue light hazards in traditional LEDs, there are seven harmful lights such as actinic ultraviolet, near ultraviolet, retinal heat, weak vision stimulation, small light sources, and infrared radiation. These 7 kinds of harmful light seriously harm our eyes and body to varying degrees.
5. Anti-light decay and prolong service life: Ordinary lamps will have serious light attenuation after half a year of use, resulting in a decrease in luminous flux, which will not meet the national low standard requirements. Currently, in order to maintain the lighting brightness that meets the national standard, the cycle of replacing the lamps It takes 2 to 6 months and requires long-term maintenance by relevant maintenance personnel, resulting in high maintenance costs and waste of resources.
6. Excellent color rendering index: the spectrum of ordinary fluorescent lamps is incomplete, resulting in color loss and color cast. Far from reaching the national standard Ra≥80, and the poor color reproduction ability of lighting fixtures will directly affect children's color discrimination ability.
7. Comfortable color temperature: The national standard stipulates that the color temperature is 3300-5300K, and the actual measurement result reaches 6500K. Too high color temperature will increase the proportion of blue radiation, and the blue light will also increase. Blue light will be aggravated due to genetics, nutritional environment, healthy habits and old age Related problems caused by macular degeneration. Late self-study for a period of time will also affect the secretion of melatonin in the students, reduce the quality of sleep, and affect the learning efficiency of the next day.
8. Resist the related hazards of fluorescent lamps: fluorescent tubes contain mercury, phosphors and other heavy metal substances. If mercury and heavy metal phosphors are improperly stored and disposed of, they will also cause great harm to the ecological environment. They can enter the ecology in various forms. The environment directly pollutes soil, air and water. Then enter the human body through the food chain, directly endangering human health, and the luminous efficiency of fluorescent lamps is low, generally fluorescent lamps are only 50lm/w. Although the fluorescent lamp emits light at 365 degrees, the light emitted in the opposite direction is basically useless. Although it is reflected back through the lampshade, the reflection efficiency is low and the energy consumption is too high. The ballasts in fluorescent lamps also emit infrasound waves that are harmful to the body.
