Re: [AGA Member] I guess im knew to

["Barry Barlow" <bbarlow@mchsi.com>]

Hi Scott,

Thanks for the info. Things sure have changed a lot over the past few years.

Barry
----- Original Message ----- 
From: "S. Hieber" <shieber@yahoo.com>
To: <aga-member@thekrib.com>
Sent: Saturday, May 03, 2003 5:58 PM
Subject: Re: [AGA Member] I guess im knew to


> Howdy and welcome,
>
> Metal Halide (MH) bulbs tend to cost more, especially if
> you have to replace them as often as seems necessary, due
> mainly to spectral shift as the bulbs ages.  Also, they
> *can* technically be subject to what is known in the light
> bulb trade as "active failure."  That's what's known in
> normal parlance as "explosion."  It's due to the way they
> are designed to work.  I think it's ver rare but it's one
> reason you want to have a double envelope bulb and/or a
> glass protective sheet in the lamp between the bulb and the
> rest of the world.  But for aquarium use, you probably
> want a sheet to keep off water anyhow.  MHs give you more
> of a point source of light you so can get nice sharp
> shadows and lots of glittery water if the water surface is
> ripply.
>
> PCs are nearly as effecient generally and probably more
> efficient for an aquarium because of the light spread --
> good parabolic or psuedo-parabolic reflectors make a lot of
> difference.  The bulbs last a long time and decent ones
> will have about 80% of their rated output even after a year
> or two of use with negligible spectral shift.  You can get
> them with a color temp high enough (10,000 K) them they
> seem about as bluish white as good MHs.
>
> Is that any help?
>
>
>
> You don't need laterite if you have a good microporous
> gravel for substrate -- that's the theory anyhow and the
> reason everyone seems to love Flourite.
>
>
> Scott H.
> --- Barry Barlow <bbarlow@mchsi.com> wrote:
> > Hi,
> > I did a couple of planted tanks a few years back and
> > really enjoyed it, got
> > out of it for awhile,thinking about getting back in.
> >
> > I don't even have a tank yet but do have a couple of
> > questions. I see that
> > everyone seems to be going with the fractured gravel
> > substrate now. Is
> > laterite dead? Compact fluorescents seem to be the thing
> > nowadays, what are
> > the pros and cons when compared to say metal halide?
> >
> > Anyways I joined AGA again, looking forward to Mays
> > issue. Also got back on
> > the list at Apd (as funny as always)good info though.
> >
> > That all Vie got except to say hello all glad yer here.
> >
> > Barry
> >
> >
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>
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