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Unread 02/13/2017, 12:35 AM   #1
steve1981
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Join Date: Aug 2014
Posts: 355
Fish tank white LED ratio

I am building a DIY LED unit for my new 100g mixed fish and coral tank. Won't be holding many sps but may get some easy ones.
Tank is 1600x490x610mm LxDxH.

My almost final list is as follows...
24x white
48x blue (royal and actinic)
8x UV
8x indigo/violet
4x red

My question is in your opinions and experience, what colour temperatures in what ratio would give me the best spread? I have the choice of...

Super cool white 20000k
Cool white 6500-7500k
Daylight white 5500-6500k
Warm white 2900-3200k

I was thinking 12x ice, 6x cool and either 6x daylight or warm.

Thanks.


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Unread 02/13/2017, 08:11 AM   #2
oreo57
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Whites are mainly for your "enjoyment"..
BTW:
some minor tweaking or clarifications..
As to red are you referring to normal red or deep red (660nm)
as to blue are you adding any 480nm blue?
you should add a little cyan..
Main range is from 400-500nm ("UV/violet to blue green)
Actinic blue and royal blue are about the same AFAICT..
Are you going to run different whites on different channels so you can "tweak" the look?


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Unread 02/13/2017, 09:20 AM   #3
steve1981
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Quote:
Originally Posted by oreo57 View Post
Whites are mainly for your "enjoyment"..
BTW:
some minor tweaking or clarifications..
As to red are you referring to normal red or deep red (660nm)
as to blue are you adding any 480nm blue?
you should add a little cyan..
Main range is from 400-500nm ("UV/violet to blue green)
Actinic blue and royal blue are about the same AFAICT..
Are you going to run different whites on different channels so you can "tweak" the look?


Hi Oreo.

I have one channel dedicated to one sort of white and another one dedicated to the other one or two, depending on what's best.

The reds I have a choice of 620-630 or 640-660.

The royal blue are showing as 440-450 and blue (what I called actinic) is 460-470. The next one up they do is turquoise 500-510.

What you think?


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Unread 02/13/2017, 09:28 AM   #4
steve1981
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Actually it appears there is another 15000 white available.


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Unread 02/13/2017, 11:17 AM   #5
oreo57
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From a charting perspective (fun to play with)
Quote:
* MIXING LIST
----------------------------------------
LED UV (400nm) [120°] x8
LED Violet (420nm) [120°] x8
LED RoyalBlue (440nm) [120°] x24
LED Blue (460nm) [120°] x12
LED Cyan (500nm) [120°] x4
LED DeepRed (660nm) [120°] x4
LED CoolWhite (8000K) [120°] x24
LED NeutralWhite (4000K) [120°] x12
----------------------------------------

* SIMULATION DATA
----------------------------------------
Luminous flux : 5,269 lm
Radiant flux : 38,851 mW
PPF : 152 umol/s
TCP : ‑ K
CRI : ‑
λp : 438 nm
Color : #6C4CFF
----------------------------------------

* PERFORMANCE @ 53cm
----------------------------------------
Irradiance : 14.7 W/m²/s
Illuminance : 1,990 lx
PPFD : 57.5 umol/m²/s
----------------------------------------

by SPECTRA 1.0β @ 1.023world
http://spectra.1023world.net/
scores 92 out of 100 on hitting the correct absorption bands..
that said there are too many real and personal variables to consider..
some like a whiter reef, some deep blue, few windex..

Plug your numbers and/or the ones above into the calculator..
http://spectra.1023world.net/


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Unread 02/13/2017, 11:23 AM   #6
steve1981
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Posts: 355
Quote:
Originally Posted by oreo57 View Post
From a charting perspective (fun to play with)


scores 92 out of 100 on hitting the correct absorption bands..
that said there are too many real and personal variables to consider..
some like a whiter reef, some deep blue, few windex..

Plug your numbers and/or the ones above into the calculator..
http://spectra.1023world.net/


You've lost me a little bit. Is that a calculator on working out what colour spectrum is best? Where do you get the 92 out of 100 from?


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Unread 02/13/2017, 12:20 PM   #7
oreo57
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Quote:
Originally Posted by steve1981 View Post
You've lost me a little bit. Is that a calculator on working out what colour spectrum is best? Where do you get the 92 out of 100 from?


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After you put in your diodes, on the left is a chart Click on it gives you different charts..
One shows photosynthetic and flourescent bands (little triangle)
Calc gives you a numerical score on how well the spectrum hits these peaks..

another will show the overall tone you achieve..
fun stuff..


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Unread 02/13/2017, 12:38 PM   #8
steve1981
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Posts: 355
Quote:
Originally Posted by oreo57 View Post
After you put in your diodes, on the left is a chart Click on it gives you different charts..
One shows photosynthetic and flourescent bands (little triangle)
Calc gives you a numerical score on how well the spectrum hits these peaks..

another will show the overall tone you achieve..
fun stuff..


Just what I was after. Will have a play tonight. Thanks.


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Unread 02/13/2017, 04:16 PM   #9
steve1981
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Oreo, what range of LEDs where you using for the above workings out on the site?


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Unread 02/13/2017, 07:58 PM   #10
oreo57
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Generic.. see the sun and led tab..


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Unread 02/14/2017, 12:34 AM   #11
steve1981
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Posts: 355
Quote:
Originally Posted by oreo57 View Post
Generic.. see the sun and led tab..

There's no 3w ones on mine, only 1w.


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Unread 02/14/2017, 05:30 AM   #12
steve1981
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Quote:
Originally Posted by steve1981 View Post
There's no 3w ones on mine, only 1w.


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Don't worry. Don't need to be.


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Unread 02/14/2017, 12:48 PM   #13
oreo57
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Quote:
Originally Posted by steve1981 View Post
Don't worry. Don't need to be.


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Yea just triple the count..
Spectrum or tone doesn't change. PAR calculations do but those I just consider a ballpark figure anyways..


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