Ko'pgina sinf xonalarining yorug'lik intensivligi, LED rang harorati va miltillash chastotasi milliy standartlarga javob bermaydi
Classroom lighting should not only be "bright", but "standard", which is what Gu Lin insisted. "Classroom lighting has relevant national policies, such as the "Classroom Lighting and Lighting Hygiene Standards for Primary and Secondary Schools", but during the construction and acceptance of school buildings, classroom lighting does not have to be compelled to meet the standards like firefighting and sewage discharge. In fact, if the classroom lighting Failure to meet the standard will greatly affect the students' eyesight.
LED o'quv lampalari ishlab chiqaruvchilari sinfdagi yorug'lik muhiti asosan quyidagi nuqtalarda standartlarga mos emasligini aniqladilar:
Stolning yoritilishi va yoritilishining bir xilligi odatda milliy standartdan past (milliy standart: stolning yoritilishi 300 lyuks dan, yorug'lik bir xilligi esa 0,7 dan katta bo'lishi kerak). Biroq, agar o'quvchilar uzoq vaqt davomida kam yorug'likda bo'lsa va bir xil sinfdagi turli partalar tomonidan qabul qilinadigan yorug'lik bir xil bo'lmasa, ba'zi o'quvchilar o'qish, o'qish va yozishda qiynaladi, bu esa vizual charchoqni osongina keltirib chiqaradi.
At the same time, a point that is often overlooked is that most classrooms use ordinary bracket lamps installed in front of the blackboard as blackboard lamps, and no special blackboard lamps are used, or even blackboard lighting is not arranged, resulting in the average blackboard illumination far lower than the national standard (national standard: blackboard illumination Greater than or equal to 500 lux, the uniformity is greater than 0.8), some students can't see the text on the blackboard, and they are prone to visual fatigue and myopia.
Most of the classrooms are directly installed with exposed fluorescent tubes. The light directly hits the students' eyes and produces glare, which distracts the students' attention, reduces the learning efficiency, causes visual fatigue, and induces myopia. In addition, fluorescent lamps are generally equipped with magnetic ballasts, which have serious optical stroboscopic effects. In order to adapt to frequency changes, students' visual systems will frequently adjust themselves, causing visual fatigue.
Rangni ko'rsatishning juda past ko'rsatkichi ham sinf yoritilishining umumiy kamchiligi hisoblanadi. Aksariyat sinf xonalarida rang berish indeksi 70 ga yaqin bo'lgan lyuminestsent lampalar ishlatiladi (milliy standart: yorug'lik manbasining rang berish indeksi 80 dan kam bo'lmasligi kerak), bu ranglarning buzilishiga olib keladi, ayniqsa, san'at, kimyo, qo'l san'ati kabi professional sinflar, ob'ekt rangini to'g'ri baholashga ta'sir qiladi, shuning uchun ob'ekt o'z rangini haqiqatda taqdim eta olmaydi va vaqt o'tishi bilan rang ko'rligi va rang zaifligi kabi ko'rish muammolarini keltirib chiqaradi.
Bundan tashqari, ko'pchilik sinfxonalar odatda yuqori rang harorati (6500K) lyuminestsent naychalardan foydalanadi (milliy standart: sinflar 3300-5500K rang temperaturali yorug'lik manbalaridan foydalanishi kerak), bu ko'k yorug'lik xavfiga ega, ko'k chiroq retinaga qaytarilmas zarar keltiradi va ko'rish yomonlashadi. katta tahdid qildi. Yuqori rang harorati o'quvchilarni osongina hayajonga solishi va osongina charchashiga olib kelishi mumkin, chunki ochiq rang juda oq.
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