🚀 go-pugleaf

>>>>> On 28 Aug 92 01:30:55 GMT, mark@cs.monash.edu.au (Mark Goodwin) said:
Mark> laub@Software.Mitel.COM (Boniface Lau) writes:
Mark> >Does anyone have a medical explanation on why fluorescent light
Mark> >gives headache?

Mark> I have long suspected that 50(or60)Hz fluorescents somehow
				 ^^^^^^^^^^
Mark> strobe with the refresh rate of the display monitor. 60 Vrs. 72
Mark> Hz refresh on your monitor *does* seem to make a difference
Mark> (72Hz is better). Monitors with 60Hz refresh rate under
Mark> fluorescents at 50Hz seem to flicker.  (note: in Australia our
Mark> mains power is 50Hz).

>>>>> On 29 Aug 92 05:54:34 GMT, nelsonm@leela.cs.orst.edu (Michael Nelson) said:
Michael> In <LAUB.92Aug25194952@laub.Software.Mitel.COM> laub@Software.Mitel.COM (Boniface Lau) writes:

Michael> >Does anyone have a medical explanation on why fluorescent
Michael> >light gives headache?

Michael> I think my pen test may provide insight.  Try wave a pen or
Michael> similar item in from of the minitor.  In many cases I notce
Michael> that there is a definite strobe affect.  My dad also noticed
Michael> that the early mac screen sometimes appeared to flicker when
Michael> seen through peripheral vision (better at detecting motion).

Michael> I believe the problem may have a lot to do with the screen
Michael> refresh rate, and the flourescent lights mixing and producing
Michael> a low frequency (10hz?) light fluctiation that is detectable
	   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Michael> enough to cause strain.  Of course I could be wrong.
	 ^^^^^^^^^^^^^^^^^^^^^^

The explanations are plausible - monitors with low refresh rate always
irritate my eyes.
--
Boniface Lau    (613) 592-2122 ext. 3042    Boniface_Lau@Mitel.COM
Mitel Corp.  				    
350 Legget Drive, Kanata
Ontario, Canada, K2K 1X3