Re: [APD] If it's good for street light...

["S. Hieber" <shieber at yahoo_com>]

Thanks.  GE has a little info series on inductin lamps
here:

http://www.gelighting.com/eu/institute/firstlight/module07/01.html


sh

--- Mariano Fernández Bonfante
<mariano_bonfante at hotmail_com> wrote:

> Scott:
> 
> Here?s a link with the Philips QL.
> 
>
http://www.kekon.hu/katalogus/fenyforras/catalog/products/5/5016/5016h.pdf
> 
> Talking about lm/w, it isn?t that bad. But I have no idea
> about costs.
> 
> Mariano
> 
> 
> >From: "S. Hieber" <shieber at yahoo_com>
> >Reply-To: aquatic plants digest
> <aquatic-plants at actwin_com>
> >To: aquatic plants digest <aquatic-plants at actwin_com>
> >Subject: Re: [APD] If it's good for street light...
> >Date: Mon, 18 Jul 2005 06:32:24 -0700 (PDT)
> >
> >Non filament electrodes can be had -- I think GE is
> making
> >them. The cost doesn't necessarily offset the saving in
> >bulb life. They still rely on an arc passing through the
> >plasma.  Without the arc, (using an external
> elecromagnetic
> >field) the electricity to generate the UV photons in the
> >gas is rather terriffic -- a lot of the mag field cannot
> be
> >aimed at the bulb. Iirc, this isn't especially energy
> >efficient.
> >
> >sh
> >
> >
> >--- Mariano Fernández Bonfante
> ><mariano_bonfante at hotmail_com> wrote:
> >
> > > Once I read about special lights that have 100.000
> light
> > > hours. Basically
> > > they are fluorescent lamps, but they are excited with
> a
> > > high frequency
> > > electromagnetic field rather than an electric current
> > > passing through
> > > electrodes at the lamp end. The last ones define the
> lamp
> > > life in
> > > fluorescent lightning so avoiding them extend the
> duty
> > > life in great amount.
> > >
> > > Mariano
> > >
> > >
> > >
> > > >From: "S. Hieber" <shieber at yahoo_com>
> > > >Reply-To: aquatic plants digest
> > > <aquatic-plants at actwin_com>
> > > >To: James H <spreerider at gmail_com>,        aquatic
> > > plants digest
> > > ><aquatic-plants at actwin_com>
> > > >Subject: Re: [APD] If it's good for street light...
> > > >Date: Sun, 17 Jul 2005 12:51:22 -0700 (PDT)
> > > >
> > > >Not to pick too many nits in all the things you
> rightly
> > > >point out, but I think it worth mentioning that the
> > > process
> > > >for the super bright LEDs, while relying on
> fluorescence
> > > >isn't quite the same process in the glass bulbs.
> With
> > > the
> > > >bulbs, the gas, which includes vaporized mercury,
> > > becomes a
> > > >plasma when heated and that emits UV photons that
> cause
> > > the
> > > >phosphors to fluoresce. With the LEDS, there is no
> > > plasma
> > > >-- it's a solid state affair. It's a diff that
> doesn't
> > > >matter to most on APD, I would guess, but one that I
> > > find
> > > >terribly interesting. The incandescent is such a
> crude
> > > >device compared to the arc lights (fluorescents, MH,
> > > etc)
> > > >and LEDs. But hey make great heaters. ;-)
> > > >
> > > >sh
> > > >
> > > >--- James H <spreerider at gmail_com> wrote:
> > > >
> > > > > super bright leds are also less efficient than
> > > flourecent
> > > > > lights, they
> > > > > work off the exact same principles but produce
> less
> > > light
> > > > > per watt.
> > > > > sodium lamps are alot more efficient than
> flourecent
> > > so
> > > > > would use alot
> > > > > less power than a led version and i dont believe
> that
> > > > > these leds are
> > > > > putting out the same ammount of light as a 400w
> > > sodium
> > > > > lamp, probalby
> > > > > only putting out like 200w at most, or else you
> would
> > > > > need alot of
> > > > > leds, but i could be wrong with that, new
> technology
> > > and
> > > > > all.
> > > > > btw i design and manufacture led lights for
> > > underwater
> > > > > use with
> > > > > cameras (my favorite are the uv cameras and uv
> > > lights, i
> > > > > make a
> > > > > invisible spot light)
> > > > > James
> > > > >
> > > > > _______________________________________________
> > > > > 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
> > >
> >
> >
> >Plants and DVDs for sale at the AGA table at the ACA
> 2005 Annual 
> >Convention, Fort Worth, Texas on July 21-24, 2005.
> >ACA Convention Details at
> >
> >http://www.aca2005.org/
> >
> >* * * * * * * * * * * * * * * * * * * * * *
> >Share the fun; show your work.
> >The AGA's Sixth Annual International Aquascaping Contest
> is open.
> >
> >Find about about here:
> >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
> 


Plants and DVDs for sale at the AGA table at the ACA 2005 Annual Convention, Fort Worth, Texas on July 21-24, 2005. 
ACA Convention Details at 

http://www.aca2005.org/

* * * * * * * * * * * * * * * * * * * * * *
Share the fun; show your work. 
The AGA's Sixth Annual International Aquascaping Contest is open.

Find about about here: 
http://showcase.aquatic-gardeners.org
_______________________________________________
Aquatic-Plants mailing list
Aquatic-Plants at actwin_com
http://www.actwin.com/mailman/listinfo/aquatic-plants