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Re: [APD] Aquatic-Plants Digest, Vol 94, Issue 6
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In a message dated 1/26/2012 12:11:29 P.M. Eastern Standard Time,
aquatic-plants-request at actwin_com writes:
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Today's Topics:
1. re light fixture (RMGTBTS at aol_com)
2. Re: re light fixture (Jerry Baker)
3. Re: re light fixture (tomokoschum at knology_net)
4. Re: re light fixture (Erik Olson)
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Message: 1
Date: Wed, 25 Jan 2012 12:25:10 -0500 (EST)
From: RMGTBTS at aol_com
Subject: [APD] re light fixture
To: aquatic-plants at actwin_com
Hi Erik!
well IMHO Coralite fixed the problem with the bad ballasts. I had the
same experience with past failures but found that the more recent models
have
better ballasts and j am currently running 6 strips all for over 18
months
now with no problems.
i dont have any with fans as i find unless in a canopy its just more
power usage. Besides the cats hate them.
I am running 2WPG or about that on each tank and strips are 65's 96's and
130"s (2x65's on strip), so a good variety to evaluate.
i think the old ballasts came from and were manufactured by a company
outside of the US. GEE imagine that.
but I cant wait to hear about the LED's and their ratings as to life of
unit and plant growth.
rich green
milton ma
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Message: 2
Date: Wed, 25 Jan 2012 09:47:56 -0800
From: Jerry Baker <jbaker6953 at gmail_com>
Subject: Re: [APD] re light fixture
To: aquatic plants digest <aquatic-plants at actwin_com>
On 1/25/2012 9:25 AM, RMGTBTS at aol_com wrote:
> but I cant wait to hear about the LED's and their ratings as to life of
> unit and plant growth.
Some of Cree's new LED emitters have efficiencies over 100 lumens per
watt and emit fairly strongly in the blue portion of the spectrum, which
is good for plants. They even come in high-CRI color bins which means
the fish and plants will show off their true colors. The expense isn't
too bad when you consider that these LEDs should have a useful life of
over 10 years on a 12-hour cycle. You could achieve the same lighting
levels as an AH Supply 55W kit using only 45 watts or so. The issue
seems to be that nobody is really manufacturing aquarium lights using
these emitters yet.
------------------------------
Message: 3
Date: Wed, 25 Jan 2012 13:41:26 -0500
From: tomokoschum at knology_net
Subject: Re: [APD] re light fixture
To: "aquatic plants digest" <aquatic-plants at actwin_com>
I just purchased two 9W screw-in LED lamps that are used for terrarium and
vivarium. They are amazingly bright. I believe that their color temp is
6500K.
I am in the process of building a vivarium (out of a 20 gallon high)
using some emersed grown aquatic plants and some terrarium friendly plants and
I cannot really tell you how effective they are for growing aquatic plants
in an aquarium. However, judging from the fact that many dart frog and
tree frog hobbyists are growing gorgeous Bromeliads and other plants in their
vivarium, I suspect that these lamps should do just fine for small planted
aquariums. I have to ask my friend to let me borrow his PAR meter to tell
what the PPFD values are, but I got the feeling that they are much
brighter than the majority of the common CF's. They are somewhat pricey, but it's
not bad at all if you take its 40,000 hour life into consideration.
I got my light at this site: http://www.lightyourreptiles.com/
The screw-in LED's are listed toward the bottom of the page.
On Wed 25/01/12 12:47 PM , Jerry Baker jbaker6953 at gmail_com sent:
> On 1/25/2012 9:25 AM, RMGTBTS at aol_c
> om wrote:> but I cant wait to hear about the LED's and their
> ratings as to life of> unit and plant growth.
>
> Some of Cree's new LED emitters have efficiencies over 100 lumens per
> watt and emit fairly strongly in the blue portion of the spectrum, which
> is good for plants. They even come in high-CRI color bins which means
> the fish and plants will show off their true colors. The expense isn't
> too bad when you consider that these LEDs should have a useful life of
> over 10 years on a 12-hour cycle. You could achieve the same lighting
> levels as an AH Supply 55W kit using only 45 watts or so. The issue
> seems to be that nobody is really manufacturing aquarium lights using
> these emitters yet.
> _______________________________________________
> Aquatic-Plants mailing list
> Aqu
>
atic-Plants at actwin_comhttp://mailman.actwin.com/mailman/listinfo/aquatic-plants
>
>
------------------------------
Message: 4
Date: Wed, 25 Jan 2012 11:19:36 -0800 (PST)
From: Erik Olson <erik at thekrib_com>
Subject: Re: [APD] re light fixture
To: aquatic plants digest <aquatic-plants at actwin_com>
On Wed, 25 Jan 2012, Jerry Baker wrote:
> On 1/25/2012 9:25 AM, RMGTBTS at aol_com wrote:
>> but I cant wait to hear about the LED's and their ratings as to life of
>> unit and plant growth.
>
> Some of Cree's new LED emitters have efficiencies over 100 lumens per
watt
> and emit fairly strongly in the blue portion of the spectrum, which is
good
> for plants. They even come in high-CRI color bins which means the fish
and
> plants will show off their true colors. The expense isn't too bad when
you
> consider that these LEDs should have a useful life of over 10 years on a
> 12-hour cycle. You could achieve the same lighting levels as an AH
Supply 55W
> kit using only 45 watts or so. The issue seems to be that nobody is
really
> manufacturing aquarium lights using these emitters yet.
I'm building an 8emitter setup of Cree XM-L's for a 95-gallon Tanganyika
tank. Trying to dream up a way to cool it with tank water by passing
tubing up from the tank and across the top of an aluminum channel or
inside an aluminum tube & running a circulation pump. The hangup is
finding a tubing material that doesn't insulate too much yet is also inert
& won't leach into the tank. For instance, copper? I don't think so.
Maybe a thin-wall vinyl tube against the channel?
Anyway, it's a bit of a fun experiment. I may abandon the water cooling
entirely. Planning to run it at 1.7 amps = 40 watts total, which should
be great for a non-planted aquarium. But because the XM-L's can be pushed
to 3+ amps, one could imagine doubling the power on this little rig and
getting enough lighting for a medium-level 55 or a high-light 29. But
expensive. Think $200 just for all the parts.
- Erik
--
Erik Olson
Sent from my spiffy new Linux box
------------------------------
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End of Aquatic-Plants Digest, Vol 94, Issue 6
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