Number of LEDs for this tank?
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Old 06-15-2013, 04:19 AM   #1
Fraz19
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Number of LEDs for this tank?


I'm building a fixture for my wife's planted tank... I'm a reef guy and have built led fixtures for my world of coral, but I'm out of my element with helping her with freshwater plants, so this seems the place to ask.

My prerequisite for the fixture... I want her to be able to grow anything she might ever reasonably want to grow. It will have a dimmer to tone it down but if she takes a shine to a high light plant, I want the light source to be adequate.

I have read all the stickys and write ups I could find, but I still don't have a warm and fuzzy, so I'm hoping someone here can answer (or give an experienced/educated opinion on) these two questions... 1) How many LEDs would you run. 2) What color or mix of colors.

Info on the tank:
The tank is about 37 gallons, 36"x12" and 20" tall and the fixture will be suspended above, and I will put the appropriate lenses on the emitters to focus the spread. For my tanks I run Phillips Rebels at 700ma @ 3V, for hers I will either go with the same Phillips Rebels or Cree emitters, probably the Phillips unless someone just makes an overwhelming case for the Crees.

Thanks in advance!
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Old 06-15-2013, 01:28 PM   #2
ewanvt
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I have just finished my fixture so am by no means experience with LED's

the following helped me heaps:

http://www.plantedtank.net/forums/sh...d.php?t=168999
http://www.rapidled.com/retrofit-kits/
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Old 06-15-2013, 02:12 PM   #3
Fraz19
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Thanks, I saw that thread yesterday and knocked the math out. But again, I just wanted some people with experience to chime in with "I would put this many LEDs on the strip and would use these color temperatures".
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Old 06-15-2013, 05:56 PM   #4
Steve001
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Build My Led Try their diy led design app. They have a forum too.
http://www.buildmyled.com/ They are located in Austin Texas.

Last edited by Steve001; 06-15-2013 at 06:08 PM.. Reason: .
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Old 06-15-2013, 06:25 PM   #5
Fraz19
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Great tool, thanks Steve!
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Old 06-16-2013, 03:20 AM   #6
jeffkrol
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Quote:
Originally Posted by Fraz19 View Post
I'm building a fixture for my wife's planted tank... I'm a reef guy and have built led fixtures for my world of coral, but I'm out of my element with helping her with freshwater plants, so this seems the place to ask.

Thanks in advance!
Well for the sake of arguement, and to make you feel all warm and fuzzy.. Photosyntesis is photosynthesis and the sun is the sun
re: if it is in coral or fw.. The only major problem is fw tanks look.. err.. unnatural w/ reef lighting.. (and the color spectrum MAY add to algae blooms)

So think of it this way: Use the same reef parameters but now add green/yellow/red.. to balance out the color spectrum to a warmer temp..

For a down and dirty see my "experiment tank". The blue/white only is 18W royal blue and 9W 10K (or so) white.. adding red and warm white (I should have just gone up to about 6000k-ish not 3500K but since they were only 1w chips I figured I'd err on the lower color side) made it more "natural"


http://www.plantedtank.net/forums/sh...184368&page=14

Last edited by jeffkrol; 06-16-2013 at 03:23 AM.. Reason: add link
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