Talk about light pollution harm to teenagers1

Poor and backward, before reading by pine oil lamps, kerosene lamps, fresh and bright myopia, now all kinds of the lamp that shield an eye, eye, myopia rate has soared, so rampant exactly what causes myopia?

the study found that the formation of myopia has two big reasons, congenital genetic and acquired improperly with the eye, adolescent health research institute, Beijing medical university study confirms that genetic myopia really only about 40% of the total myopia, juvenile myopia is mostly to study light environment and the excessive cause with its eyes.

stroboscopic myopia is the culprit. A stroboscopic is resulted from the ac voltage changing of periodical change of light intensity, frequency flash memory is that of all the communication source, such as incandescent lamp, fluorescent lamp, metal lamp, etc. , usually is 100 times per second, it is because the stroboscopic hide it at the back of the light, to many teenagers premature back the eyes of the heavy burden. Wells of the university of Cambridge, UK, Dr. King studies confirm that stroboscopic is the main reason for the surge in modern myopia.

so what eyes need light? Scientific studies have found that the ideal light source must meet the following conditions: don't blink, light stability, light emitting area is large and uniform, color temperature around 4500 k ( The equivalent to 9 o 'clock in the morning sunshine) , color rendering index above 80, or about 500 lux. Family, classrooms, library and youth learning place should be equipped with the light source. Only high quality tricolor fluorescent light because of its high power factor electronic ballast, makes the stroboscopic frequency up to 60000 times per second, harmless to the eyes.

energy-saving lamps pollution-free is the basic principle of using AC - DC - AC variable frequency transformation function of electronic ballasts, power frequency 50 Hz, 220 V alternating current into over 40 KHZ alternating current (AC), and on the tricolor fluorescent tube, drives the fluorescent tube electric light. Because of the high driving power frequency fluctuation is small, the fluorescent tube stroboscopic depth is less than 5%, no stroboscopic effect. By scientific computing experiments show that drive fluorescent tube discharge light electric power frequency should be in the 40 - 80 KHZ, between and within this range, the higher the frequency, stroboscopic depth of the fluorescent tube is smaller, the smaller the stroboscopic effect, its harmfulness. Only USES the rong tai electric light source in the production of tricolor fluorescent lamp is one of the best lighting lamps and lanterns for young eyes.