Hvorfor klasseværelsesbelysning opfylder sundhedsstandarder er så vigtigt
In the general consciousness, it is "well known" that light affects vision, but the perception of the degree of impact is different. In fact, in addition to some congenital heredity, poor classroom lighting environment is one of the direct main reasons for students' myopia. The classroom is too dark, and the problem of stroboscopic light will lead to changes in the refractive system of the students' eyes, excessive adjustment of the intraocular muscles, and the occurrence of myopia. Everyday, using the mobile phone to turn on the lens and point it at the fluorescent light, the stroboscopic mobile phone screen that is invisible to the naked eye can be "recognized" - the screen will appear striped. In addition, long-term study in poor classroom lighting environment will easily lead to low-light bending or even lying on the table, causing students who are in the critical stage of development, growth and shaping to "can't stand up straight" or damage to their cervical vertebrae.
The "color rendering index" (referred to as the CRI for short, the index that evaluates the ability of a light source to display the original color of an object is called the color rendering index) is a lighting index that has received less attention. A high CRI is conducive to improving students' ability to recognize colors. The color rendering index of fluorescent lamps and low-quality LED light sources is around 70, that is, about 30 percent of the original color of the object is lost, and the color rendering ability of saturated red (R9) is generally low, or even negative. Long-term study in such a classroom lighting environment will inevitably lead to the decline and decline of color discrimination ability, resulting in color weakness and poor color discrimination ability.
Elevernes indlæringseffektivitet er uadskillelig fra farvetemperaturen (evalueringsindekset for farven udsendt af lyskilden): når farvetemperaturen er lavere end 4000K, og lyset er blødt, er det svært for eleverne at koncentrere sig. Farvetemperaturen er højere end 6000K, og lyset er hvidt og nemt at blive begejstret og træt. Undersøgelser har vist, at en farvetemperatur på 5000K er mere velegnet til læring, hvilket er mere effektivt for lærere og elever.
Det kan ses, at opfyldelse af sundhedsstandarderne for klasseværelsesbelysning er en af måderne til effektivt at forhindre elever i at have sub-sundhedsproblemer. Det bør ikke kun opfylde de nationale standarder, men også opnå formålet med at pleje elevernes sunde vækst i form af forskellige indekskoefficienter.
