How LED eye protection classroom lights promote classroom lighting transformation
Classroom lighting has a great impact on the vision health of young people. With the increasing rate of myopia, the visual health of adolescents has received extensive attention from society and government departments.
In addition, the continuous development and improvement of the research of LED lighting technology has provided more ideas and solutions for classroom lighting. Therefore, classroom lighting not only meets the basic lighting needs, but also more comfortable and safer. In terms of vision, being able to see clearly and not getting tired is the key concern of classroom lighting.
The lighting environment of most school classrooms in our country uses simple fluorescent lamps, most of which are bare lamps without a cover. The lighting environment of the classroom is relatively poor:
1. The illuminance and uniformity of illuminance are generally lower than the national standards. The standard values of eye-protection classroom lamps are above 300LX and above 0.7, while the illuminance and uniformity of fluorescent tubes cannot be satisfied. If students are in low illuminance and illuminance for a long time Learning under a light environment with poor uniformity can easily cause visual fatigue.
Second, the blackboards in most classrooms do not have special classroom blackboard lights. Students cannot see clearly, have difficulty concentrating, and are prone to visual fatigue, leading to myopia.
Three, fluorescent lamps are generally equipped with inductive ballasts, and the flicker is serious. In order to adapt to the frequency changes, the student's visual system will be adjusted excessively frequently, causing visual fatigue. The current eye protection lamps require no flicker.
Fourth, fluorescent tubes, the color temperature is too high, generally above 6000K, because the light color is too white, and the blue light component is too much, it is easy to cause student excitement, cause eye fatigue, even cause insomnia, harm physical and mental health, normal classroom eye protection The color temperature should be maintained at 3500K-5500K, close to natural light, warm and comfortable.
At present, the government and schools have gradually realized the importance of school lighting’s impact on students’ eyesight, and have begun to carry out lighting renovation projects, using standard LED eye-protecting classroom lights and LED eye-protecting blackboard lights to improve the lighting environment of school classrooms. Popularize eye-care high-quality classroom lighting environment to protect the health of young people's eyesight!
The standard or non-compliance of the school classroom lighting environment directly affects the eyesight of the students. The quality of eye protection classroom lights on the market is uneven, but the LED eye protection classroom lights produced by Benwei Lighting stand out among the many classroom lights! As a healthy campus lighting Implementer. The LED eye-protecting classroom 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 1,000 primary and secondary schools that we have renovated did not meet the national standards. 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.
