Various LED testing and extracting data .

Well...

I've finished half -way through another 'project' of mine ,
I had for long in mind ...

A software ,a calculator for leds ,solid state lights ,in general ...

A calculator somewhat different ...
With plenty of 'features' about the leds ,their light generation and ...their relation with the plantae kingdom..

Most favorably for a certain species,amongst the thousands ...

So ...
I've started it ...
Needs plenty of data input ,digitizing various graphs ,searching for weird equations and so on ...
But hey ,everything is there ,...
Even the photosynthesis action spectrum of that particular plant species ,is available ...
For extraction ,at least ..It was always there,somewhere 'hidden' ..
Somehow,I knew there had to be somewhere ...
And indeed it was ,there to be found ...

( Thanx,to it's ...persecutors.Which are trying to find new ways to discover and exterminate it ...
While the 'fruits' of their effort .... are ..' valuable donations' ..to a community,
if not the humanity !!
-How odd is that ,really ? LOL ......)

Anyway ...blah -blah enough ....

Searching the laptop's external HD ..
I've ..re-discoverd this :



An excel / open office led grow light calculator ,using some outdated LEDENGIN emitters
(sheet is from 2011 )

Those :




So I thought ,what I nice idea ,to test my half-completed calculator ,while at the same time play a bit
with some "bio " characteristics of them .....

I think the spreadsheet ,can still be downloaded from here :
http://www.sevengens.com/id93.html

(check at the middle of the page for the download link )


The umol/sec converion of the spreadsheet is pretty fucked up ,if I remember correctly ..
It does not return correct results ...(conversion )

Oh ,if someone wish to get my ( half -complete ) calculator just pm me .
I'll e-mail to anyone interested ...

So ....First led to the test ....
The LedEngin LZ1-10R205 deep red (655-670 nm )

nm-mA-Vf-RadFlux(W)-lumens-Peak λ -Centroid λ-mW/W -LER (in yellow) -spectr. range-Rad zFlux (mW )-% of typ.@700mA


So one of those chosen (where it says 100%= 1 piece )




The tool provides a CSV page ,with x,y values of the plot ...
So ...

On to the other "calculator "
...To place the data ....
The "operational" ones :


And the x,y plot
(from 380-780 ,currently ...)
To get these :


Estimated LER (from the spreadsheet )
,very close to the manufacturer's ....

66,6 calculated ,over the 66.3 one from the
led's specs...
Cool...

On to the ....
"bio-psy ' of the led ...
Or better yet ....
10 of those deep reds ...



..

Rad efficiency : 21,85%
A poor 1,2 umol/J Quantum Flux efficiency.
Even worse at PAR 400-700nm ...
1,19 ...

But hey ..
From the 22,6 umols/sec only
the 1,34 is reflected ...
~6% ,..
RQE efficency ?
A whopping 92.98% !!!

The DLI figures ...
WTF grows with 1,62 mol,
for a 20 hours daily light integral ?
10 of those can't really support any growth ..
@~19 Watts power dissipation ...


Photomorphogenic characteristics ?
Check them out for yourselves ..

To calculate combos of those emitters,should be a bit more tricky ...
(Calculations of Total :Vf- LER-lumens- Rad flux,need to be done for every given combo )

So ,before moving to monochromatic combos .....

Let's check that 2011 LEDengine warm white ,a bit ...

LZ1-10WW05 ,2700-3700 ,@ 700mA , Vf=3,3
Radiometric output= 0,353 W ,106,58 lumens ..
LER =301,95 =~ 302 lm/W



Copy the CSV plot values ...
Paste them to the other calculator ...
And ...


LER estimation is 305 versus the 302 of the manufacturer ..
( a rather' constant' ~3lm/W differencei n LER values, for the warm white 3000K !!!.
Is it The wls 'missing' from calculations ? ..>780nm & <380 nm ?? ) )

On to the rest ...

Ten of those WW as with the deep red ones ...

The NW one






325,2 LER estimated versus the 323 of the manufacturer ..