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荧光灯(俗称日光灯)具有光效高、寿命长、光线柔和、显色性好等优点,因而得到了越来越广泛的运用。尤其是学校教室,都普遍采用荧光灯照明,笔者就荧光灯特性及应用谈些认识和体会,供改善教室照明参考。一、闪烁荧光灯以交流电源工作时,电流交变,每一周期经过零值二次(图1)。由于荧光灯管的荧光现象,能产生余辉,所以荧光灯的光通量输出变化一般不会出现零值。由图2可见,φ_m点是最大光通量输出,φ_n点是最小光通量输出。光通量输出随电压、电流周期性地变化现象,称为闪烁。闪烁能对视觉产生不良影响,当在荧光灯下看书时间较长时,会视线不清,
Fluorescent lamps (commonly known as fluorescent) with high luminous efficiency, long life, soft light, good color rendering, which has been more and more widely used. Especially classrooms, are commonly used fluorescent lighting, the author on the characteristics and application of fluorescent light talk about some understanding and experience for the improvement of classroom lighting reference. First, the flashing Fluorescent to AC power supply, the current alternating, each cycle through zero twice (Figure 1). Fluorescent fluorescent tubes, can produce afterglow, so the luminous flux of the fluorescent output changes generally do not appear zero. Can be seen from Figure 2, φ_m point is the maximum flux output, φ_n point is the minimum flux output. Luminous flux output with the voltage and current periodically change the phenomenon, known as flashing. Blinking can have a negative impact on the visual, when reading a book under fluorescent light for a long time, the line of sight will be unclear,