| Definition: | rhythmic light in which every appearance of light (flash) is of the same duration and, except possibly for rhythms with rapid rates of flashing, the total duration of light in a period is clearly shorter than the total duration of darkness Note 1 to entry: The term "eclipse" is used for the interval of darkness between two successive distinct appearances of light. Note 2 to entry: This entry was numbered 845-11-11 in IEC 60050-845:1987.
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