🚀 go-pugleaf

In article <3e759b34@iridium.webone.com.au>, russell@remove.thehovel.net 
mentioned...
> 
> "Richard Crowley" <rcrowley7@xprt.net> wrote in message
> news:v7alqfnnv6hfcf@corp.supernews.com...
> > "Klaus Vestergaard Kragelund" wrote
> > > I guess mains flicker would be a major problem in the USA, don't know
> > about
> > > New Zeeland/Australia. In Denmark it happens were seldomly in residental
> > > areas.
> >
> > Why?  Mains frequency is 20% HIGHER in USA
> >
> > PAL video flicker is quite noticable to many visitors from USA
> 
> In production circles, we call that "Film Look" :)
> 
> Seriously, given the thickness of the filament in QH lamps and therefore how
> slowly they heat up and cool down, I'd be very surprised if you could see AC
> flicker. Certainly nothing like fluorescent flicker.
> 
> Russ.

A few weeks ago I connected a photovoltaic cell to an earphone.  I could 
walk around with the earphone to my ear and put the photocell near 
lights and TV screens, video screens,  etc.  I could hear which type of 
light gave off the must hummmmm or buzzzzz.  Well the CF lights were a 
lot louder than the incandescents.


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