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Old 17-March-2008, 02:18 AM
neilzero neilzero is offline
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Floresent tubes drop to about half brightness 120 times per second. About half brightness for USA television, but 60 times per second. Computer screens, and compact floresents lights have refresh rates up to about 200 times per second, so all behave like a strobe. persistance of the phosphor (and some other factors) detemines how close to black you get when the voltage crosses zero. The incandesent bulb filliment only cools a few degrees during the near zero voltage millisecond, so the strobe effect of an incandecent is negligible, unless the power is considerably less than 50 or 60 hertz which is standard, except many airplanes use 400 hertz to reduce the weight.
I have not personally observed the eye sample rate perhaps because my left eye vision is poor. Neil

Last edited by neilzero; 17-March-2008 at 01:46 PM.
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