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Not really an answer, but the flicker fusion frequency varies between subjects and depends hugely on both the subject's physiological state and the kind of flicker. http://en.m.wikipedia.org/wiki/Flicker_fusion_threshold lists seven factors (size, color, where it occurs on the retina, contrast, etc)

http://www.scholarpedia.org/article/User:Eugene_M._Izhikevic... shows some curves that show the effect of several of these factors.




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