[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [APD] Lighting
Excuse me, it was Topsy that got the big jolt after killing
it's trainers.
Jumbo met a diff but no less violent death.
sh
--- "S. Hieber" <shieber at yahoo_com> wrote:
> The biggest electrocution was of Jumbo, a circus elephant
> that had gone off into the crdowd and killed some folks.
>
> It was decided that the best way to deal with the
> creature
> was to have Edison electrocute in front of the crowd and
> cameras. Iirc, Edison suggested the idea, who up until
> that
> time had only done demos with cats and dogs.
>
>
http://mirrors.meepzorp.com/historysociety.ca/jumbo-in-the-new-world/
>
> AC won out over DC, but Edison prospered and Tesla went
> broke and perhaps a bit mad.
>
> sh
>
> --- urville <urville at peoplepc_com> wrote:
>
> > stupid edison...
> >
> >
> > S. Hieber wrote:
> >
> > >Tesla was fooling around with wireless lighting, among
> > the
> > >many other "wild and crazy" things he was into. In
> fact,
> > he
> > >figured it was possible to transmit electricty great
> > >distances without wires and pursued this idea for many
> > >years after he had established the viability of
> > >transmitting alternating current via wire.
> > >
> > >The lights in his shop were wireless. Tesla saw very
> few
> > >patents go into production. One of the few was the ac
> > >motor, which he essentially gave away to his friend
> > >Westinghouse.
> > >
> > >Meanwhile, Edison, whose patents relied on DC power
> > >generation, gave demonstartions of animal
> electrocution
> > >around the country to demonstrate how dangerous AC
> was.
> > >
> > >Tesla countered my giving himself a large jolt of AC
> at
> > >very high frequency and suffered no apparent harm. The
> > >Edison was always the more popular of the two, as were
> > his
> > >shows.
> > >
> > >sh
> > >
> > >--- urville <urville at peoplepc_com> wrote:
> > >
> > >
> > >
> > >>now see i want tesla lights!
> > >>did they ever get made?
> > >>
> > >>
> > >>S. Hieber wrote:
> > >>
> > >>
> > >>
> > >>>Your power company is probably comparing compact
> > >>>flourescents to incandescent bulbs.
> > >>>
> > >>>Another one of Edison's get rich quick schemes,
> > >>>incandescent bulbs shed about 95-97% of their input
> > >>>
> > >>>
> > >>energy
> > >>
> > >>
> > >>>as heat and the balance as light. That's right,
> almost
> > >>>every bit of energy they consume is wasted! They
> > always
> > >>>could be made cheaply and with Edison's support they
> > >>>
> > >>>
> > >>caught
> > >>
> > >>
> > >>>on quite well. Tesla and others had more efficient
> > >>>alternatives, but everyone tended to believe Edison.
> > >>>
> > >>>With fluorescents, about 65% of their input energy
> as
> > >>>
> > >>>
> > >>heat
> > >>
> > >>
> > >>>nd about 35% as light. The seems pretty inefficent
> > until
> > >>>you compare it to incandescents! With a compact
> > >>>fluporescent that's all coiled up, that percentage
> of
> > >>>
> > >>>
> > >>light
> > >>
> > >>
> > >>>output drops a bit because the bulb blocks some of
> its
> > >>>
> > >>>
> > >>own
> > >>
> > >>
> > >>>light. So a fluorescent bulb rated at roughly about
> > 1/4
> > >>>
> > >>>
> > >>to
> > >>
> > >>
> > >>>1/5 the wattage (actual consumption) of an
> > incandescent
> > >>>will give off about the same amount of light. If you
> > >>>
> > >>>
> > >>don't
> > >>
> > >>
> > >>>turn them on and off often, they will tend to burn
> (to
> > >>>work) for much longer than incandescent bulbs too.
> > >>>
> > >>>Thus, it's hard *not* to save money switching to cf
> > >>>
> > >>>
> > >>unless
> > >>
> > >>
> > >>>one pays rediculously high prices for cf bulbs.
> > >>>
> > >>>
> > >>Drawbacks
> > >>
> > >>
> > >>>are 1) they cost more up front than incadescent
> bulbs
> > >>>
> > >>>
> > >>and
> > >>
> > >>
> > >>>2) fluorescents don't have the relative excess of
> red
> > >>>wavelength light that incandescents have and will
> > >>>
> > >>>
> > >>probably
> > >>
> > >>
> > >>>have much more green, so things will look somewhat
> > diff
> > >>>color under one light rather than the other. The
> diff
> > >>>
> > >>>
> > >>can
> > >>
> > >>
> > >>>be striking at first but even in striking cases, the
> > >>>
> > >>>
> > >>human
> > >>
> > >>
> > >>>perception seems to adapt after a short while. In
> cany
> > >>>case, the amount of diff varies from one brand of
> bulb
> > >>>
> > >>>
> > >>to
> > >>
> > >>
> > >>>another. The really cheap compcat fluorescents can
> > >>>
> > >>>
> > >>appear
> > >>
> > >>
> > >>>downright ghastly and make your skin appear
> downright
> > >>>ghostly. The better bulbs, don't make things look
> all
> > >>>
> > >>>
> > >>that
> > >>
> > >>
> > >>>diff. Note that how things look under incandescent
> is
> > >>>
> > >>>
> > >>not
> > >>
> > >>
> > >>>more correct; just diff and what most folks are used
> > to.
> > >>>
> > >>>
> > >>>Some people claim they can't tolerate being under
> > >>>flourescent lighting because of the blinking. "Old
> > >>>fashioned" fluorescent cycled on/off at 120 times
> per
> > >>>second with some detectable perectual artifacts.
> (How,
> > >>>these folks watch movies or television, I'll never
> > >>>know.)Anyway, compact fluorescents usually cycle at
> > >>>
> > >>>
> > >>several
> > >>
> > >>
> > >>>thousand to several tens of thousands time per sec,
> > and
> > >>>human visual perception simply cannot detect that.
> > >>>
> > >>>
> > >>>
> > >>>Note that most of your electric bill is probably
> going
> > >>>towards any heating or airconditioning devices that
> > use
> > >>>motors. Or other appliances such as steam irons,
> > >>>
> > >>>
> > >>toaster,
> > >>
> > >>
> > >>>dishwashers, etc. If you use any of those a lot,
> > >>>
> > >>>
> > >>changing
> > >>
> > >>
> > >>>bulbs won't make a big dent in your electric bill.
> > >>>
> > >>>Still incadescents are such awfully inefficent
> > devices,
> > >>>it's a shame to use them if you don't have to.
> > Although,
> > >>>they are excellent electric heaters if you can
> > >>>
> > >>>
> > >>accomodate
> > >>
> > >>
> > >>>their fragility ;-)
> > >>>
> > >>>
> > >>>sh
> > >>>
> > >>>--- Lief Brittan Youngs <liefy at yahoo_com> wrote:
> > >>>
> > >>>
> > >>>
> > >>>
> > >>>
> > >>>>My utility company is raving about compact
> > flourescent
> > >>>>lighting being the way to save huge costs on
> > >>>>
> > >>>>
> > >>electricity
> > >>
> > >>
> > >>>>even though the light bulbs are more expensive. Can
> > >>>>anyone veryify this?
> > >>>>
> > >>>>Also, I have been told for same amount of light you
> > >>>>
> > >>>>
> > >>need
> > >>
> > >>
> > >>>>a lower wattage compact flourescent bulb. If there
> > the
> > >>>>same savings and added light are the same in
> aquarium
> > >>>>lighting? Or are the compact light fixtures and
> bulbs
> > >>>>
> > >>>>
> > >>too
> > >>
> > >>
> > >>>>expensive?
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>* * * * * * * * * * *
> > >>>Coming Soon in November, the winners and all the
> other
> > >>>
> > >>>
> > >>beautiful entries in the 6th Annual International
> > >>Aquascaping Contest. Every continent is represented
> --
> > >>except Antarctica. Maybe next year Antarctica, too
> ;-)
> > >>
> > >>
> > >>>http://showcase.aquatic-gardeners.org
> > >>>_______________________________________________
> > >>>Aquatic-Plants mailing list
> > >>>Aquatic-Plants at actwin_com
> >
> >>>http://www.actwin.com/mailman/listinfo/aquatic-plants
> > >>>
> > >>>
> > >>>
> > >>>
> > >>>
> > >>_______________________________________________
> > >>Aquatic-Plants mailing list
> > >>Aquatic-Plants at actwin_com
> > >>http://www.actwin.com/mailman/listinfo/aquatic-plants
> > >>
> > >>
> > >>
> > >
> > >_______________________________________________
> > >Aquatic-Plants mailing list
> > >Aquatic-Plants at actwin_com
> > >http://www.actwin.com/mailman/listinfo/aquatic-plants
> > >
> > >
> > >
> > _______________________________________________
> > Aquatic-Plants mailing list
> > Aquatic-Plants at actwin_com
> > http://www.actwin.com/mailman/listinfo/aquatic-plants
> >
>
>
_______________________________________________
Aquatic-Plants mailing list
Aquatic-Plants at actwin_com
http://www.actwin.com/mailman/listinfo/aquatic-plants