1, medium color temperature
"GB7793-20 10 Hygienic Standard for Daylighting and Lighting in Primary and Secondary Schools" requires that classrooms should use light sources with a color temperature of 3300 K-5500 K. At present, the color temperature of most professional LED educational lighting lamps is 5000K, which belongs to warm white light. However, many schools use traditional T8 fluorescent lamps and ordinary LED lamps, and the color temperature is above 6500K, which belongs to cold white light.
2. There is no danger of stroboscopic lighting.
Strobe has the most obvious effect on vision, which easily distracts students' attention. The biggest harm of stroboscopic lighting is eye fatigue, and the harm of distraction ranks fourth, which reduces learning efficiency. When the traditional T8 fluorescent lamp is started and the voltage is unstable, the stroboscopic phenomenon is particularly serious. When the current is stable, the frequency flash (fluctuation depth) is also above 40%, and the frequency flash of ordinary LED lamps is also above 20%. Studying in this environment for a long time is also easy to cause visual fatigue, and the strobe light of professional LED educational lighting is less than or equal to 3.2%, which is much lower than the first two.
Which project is better, self-study, TV University, adult college entrance examination and network distance?
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