I have a theory about the effect of artificial light, which runs on an alternating current power supply (our normal power lines in the US run at 60 Hertz, actually turning all lights run from it on and off 60 times per second. ) I believe this effect has something to do with an apparent difference between a PWP's moods and ability to move being better when in natural daylight, than when under the constantly pulsating rays of indoor lighting. I am not a scientist, but i do work on electronic devices. I have also heard that a person working under a single flourescent lamp, as oppossed to two or more together, which alters the effect to the human eye, cn have fatigue and mental effects. These conditions seem to affect people who do NOT necessarily have any neurological conditions. I cannot help but believe they could adversely affect PWP's. Does anyone else have any inside info on this phenomenon? [OO] LOOKING FOR RADIOS! Ken Becker [log in to unmask] On Mon, 7 Oct 1996, Richard Fallon wrote: > My father-in-law (81) has had PD for @ 10 years. He takes sinemet and > eldopryl. During the day he is much stronger than the evenings. Seems that > when the sun goes down he goes into an "off" state. Is this fairly common? > Does anyone have any advice to counter-act this? > > Your reply would be greatly appreciated. > > > Thanks in advance, > > > Richard F. >