DIY Modular LED-Light

stardustsailor

stardustsailor

Well-Known Member
Well...
I've to say that one ...

I miss you too ..

( I was just looking through again ,some of your design's details ...
##%*&^&, Guod...
Those 'merkaba' patterns are really a pain in the @$$ ,to trace on a pcb ....
But hey ...Yeah ....Best light blending ..Which is more crucial ,than I thought firstplace ....)

PS: This thread ,should 've been a sticky long time ago ..
 
guod

guod

Well-Known Member
thx to all

you know Heliospectra, Valoya...,
here is another one from the cold Part of europ

Elbesparelser i væksthusproduktion med justerbare LED lamper (Electricity savings in greenhouse production with adjustable LED lamps)

http://www.elforsk.dk/elforskProjects/340-040/340-040_Slutrapport.pdf

no fear it´s in denglish

The new lamps where designed to be able to provide both colored light, blue at
450 nm and red at 660 nm as well as white light for improved color rendering. It
was chosen to supplement the blue and red LEDs, with both white and green
LEDs.
From the calculations shown in Table 1, it was decided to choose a neutral
white LED at a correlated color temperature of 4500 K that has a color-rendering
index of 79 and a blue photon flux ratio of 21 %.

The green LEDs were implemented in order to be able to keep a
high photon flux in the blue and red spectral region,
but still achieving white light.

Furthermore the lamps where equipped with far-red LEDs at 735 nm,
however these do not alter the visual performance and is not considered here.

Oslon LEDs1 from OSRAM where chosen for this application.
Click to expand...
 
PetFlora

PetFlora

Well-Known Member
Haha. Actually as long as you have 6 x 6 row/columns you automatically have a Merkaba pattern. Just position your NW (or WW) in a 6 pointed star and you're golden. Perhaps one CW in the center.. The other diodes can be the opposite or same as the points, POSSIBLY of lower wattage.

Goud, scanning through the link you provided... This means the lamps can be designed to plant growth and development, if we know the needs of individual plant species.

I just don't think one set of color diodes fits all as it relates to our meds. We already know sats and indicas have unique light preferences, so it is likely that hybrids will also.

The solution: panels that are ~ 80% NW (or WW) with other monochrome spectrums on separate o/o switches to be employed as desired

Further on... > Online data are important because the plants’ photosynthesis change during the day and the capacity with time of the year

PERHAPS there is a benefit of a timed dimmer to simulate morning and late afternoon reduction in intensity
(edit... since morning light is blue and late afternoon light is red, perhaps they should be adjustable individually)

An aha moment, perhaps...

> In order to evaluate the applicability we need to consider the
photon flux efficiency. In Figure 3 the efficiency of the LEDs with regard to PPF,
which is the ratio of the calculated PPF and the measured consumed power.
The PPF efficiency is observed to be over 1.5 umol/sW at 100 mA and falls to
about 1.0mol/sW at 700 mA for the Red Rebel LED. It is noticeable higher with
over 2.1mol/sW at 100 mA and about 1.2mol/sW at 700 mA for the Rebel
LED at 660 nm. High pressure sodium lamps which is normally used for
greenhouse illumination has an efficiency of around 1.9mol/sW. For the Rebel
LED at 660 nm the PPF is over 1.9mol/sW for operation currents under 250
mA. Since higher efficiency is obtained with the 660 nm red LEDs and a better
correspondence with the absorption peak of chlorophyll is was decided to
implement 660 nm LEDs in the new lamps

Considering I never had any significant result using my now 3.5 yo R/B ufo 90, could be because the reds are driven too low

stardustsailor said:
Well...
I've to say that one ...

I miss you too ..

( I was just looking through again ,some of your design's details ...
##%*&^&, Guod...
Those 'merkaba' patterns are really a pain in the @$$ ,to trace on a pcb ....
But hey ...Yeah ....Best light blending ..Which is more crucial ,than I thought firstplace ....)

PS: This thread ,should 've been a sticky long time ago ..
Click to expand...
 
stardustsailor

stardustsailor

Well-Known Member
Guod ,allow me to highlight some interesting parts ,that I liked ....


6.

LED-lamp control

LED’s (Light Emiting Diodes) comes in single colors with relatively narrow spectrum.
This means the lamps can be designed to plant growth and development,
if we know the needs of individual plant species.

Chlorophyll are the energy-harvesting molecule in the leaves, and chlorophyll

absorbs light both in the blue and the red region; and reflect most of light in the

green region. However, in the leaves there are also orange carotenoids that

absorb well in the green region of the spectrum, which also funnel energy into
the photosynthetic apparatus. Therefore, when investigating the spectral

response of photosynthesis in an intact leaf, the dip in the green part of the
spectrum is in the region of 5-30%, depending on the color of the leaf, and not

the >95% that is indicated by the light absorption of isolated chlorophyll

dissolved in e.g. acetone.This slight dip in the green is why plants appear green

to human eyes. However, more light regulated processes are occurring in the
plants. Branching is increased by blue light, flowering can be affected by far red

(dark red), and the fact that plants actually grows when exposed to yellow light
from the high pressure sodium light implies that red and blue is not the only
light harvested for growth.
The new research LED system described in part 2 is constructed
to give the highest degree of freedom with regards to spectral

composition, control and dimmability in order to investigate these issues.
It has also been shown that plants can grow in red and red/blue LED light

(Aaslyng et al. 2008).

LED’s are adjustable in intensity, from zero to full capacity. This means more
possibilities in using the light. With this tool it is possible to make the light level
more even on the plant by turning up the light, when the natural light decreases
i.e. when a cloud covers the sun, and visa versa.
Click to expand...
Diffuse light


To change the light from direct radiation to diffuse is not a part of a light

strategy, but can be a part of energy saving solution, while results show that

plants grow more from the same amount of radiation when received as diffuse
radiation compared to direct radiation (Hemming et al., 2006, Markvart et al.

2010). This work was done with diffuse filters on glass in combination with
sunlight and/or HPS lamps as light source.
Click to expand...
( Now..I'm thinking ..Monochromatic leds blue 460/470 & red 660 should have wide angle lenses .
Regarding the blue : to disperse as much the blue light ..And for the reds : As being "directional" kind of light ,to help
disperse those nutritional wls all over above the canopy..As for the whites I'm thinking a more narrow angle ...)
 
stardustsailor

stardustsailor

Well-Known Member
It is observed that for all the white LEDs around 50 % of the photon flux is in the

green region.
Click to expand...
The plant has a very advanced system that regulates the light harvest in the

chlorophyll antennae, increasing the energy efficiency in low light and lowering

it in high light, to balance the energy input and utilization. At the same time the
plant regulates the CO2 supply into the leaves by adjusting the stomatal

conductance, through which CO 2 enters the leaves. All these things together

operate to balance photosynthesis in an unstable environment. However, a
complete balance is impossible and therefore we see these scattered data,

because this is how photosynthesis operates in the real life of a plant.
Click to expand...
....................
 
stardustsailor

stardustsailor

Well-Known Member
Speaking of Heliospectra...
Have you seen the baby-heliospectra ?

http://publications.lib.chalmers.se/records/fulltext/178761/178761.pdf

multichip heliospectra custom.JPG
I Want some of these ....:twisted::twisted::twisted:

( I can see red chips 660 ,I think one of lower wls( 630? ) Some warm whites and one-maybe two- of blues ...Neutrals also ?
What a great chip !!! Ledengin I think ....It looks like it ...
They have shorted all the 'lines' so all chips are driven with same current ...)


Edit : Yeap ! ...

A 12 die chip from LEDengine was chosen for the

tests. The selection of five deep red, three blue, three

green and one far red die was done by Heliospectra

to ensure that the chip would provide a blended light
that is beneficial for plants while also being able to
produce a pleasant neutral light. The chip is mounted
on a circular circuit board with dimensions 28.3x1.7
millimetre, see Figure 30.

Not any White ,there !

Same like the "flagship" model ....

 
PetFlora

PetFlora

Well-Known Member
IMO, FWIW... white light should provide the backdrop (like a canvas) that the other colors are introduced into to create the desired effect
 
stardustsailor

stardustsailor

Well-Known Member
while also being able to
produce a pleasant neutral light.........

.....


five deep red, three blue, three green and one far red die was done by Heliospectra
to ensure that the chip would provide a blended light
that is beneficial for plants .......

Hm...
Er....
Ehm...
....
Why I just get this 'flash' ?
I see Letters and numbers .....

LCW ....
Cx7P ....
.CC ...
5L7N ....

five deep red, three blue, three green and one far red.....
(5 * x mW + 3 * y mW + 3 * z mW + i mW = ~~ 5:3:3:1 ....+/-.....)
spectra LCW Cx7P_CC.jpg

Am I hallucinating ?

That awful ,bitter cacti tea ...
Yeah..That must be ...
 
PetFlora

PetFlora

Well-Known Member
Are you hallucinating? Probably, but what else is new :bigjoint:
stardustsailor said:
while also being able to
produce a pleasant neutral light.........

.....


five deep red, three blue, three green and one far red die was done by Heliospectra
to ensure that the chip would provide a blended light
that is beneficial for plants .......

Hm...
Er....
Ehm...
....
Why I just get this 'flash' ?
I see Letters and numbers .....

LCW ....
Cx7P ....
.CC ...
5L7N ....

five deep red, three blue, three green and one far red.....
(5 * x mW + 3 * y mW + 3 * z mW + i mW = ~~ 5:3:3:1 ....+/-.....)
View attachment 2877600

Am I hallucinating ?

That awful ,bitter cacti tea ...
Yeah..That must be ...
Click to expand...
 
stardustsailor

stardustsailor

Well-Known Member
PetFlora said:
So why not start with light? And if needed, tweak it. Seems a whole lot easier to me
Click to expand...

Heliospectra acted opposite ...( North European mentality ,which I like and respect much ,plenty of times ) ....
They started 'tweaking' the 'ingredients' ( Blue-Green-Red-FarRed ) ,until the recipe was "purified" ...
Now they know ,what it takes and how it works best ...
And apply it to the common household electronic market ...


Further South ,some thought it the other way round ....
"We know that light containing all the wls from ~380 nm up to ~750 ,is used by plants ,for millions of years ..."
"Ok ,set that "known " light as basis and add what is/would be beneficial " ....
 
stardustsailor

stardustsailor

Well-Known Member
...While the truth stays somewhere between two minds.
Somewhere between Guod and Stardustsailor...
Hell ,yeah!


To Guod with R-E-S-P-E-C-T :

[video=youtube;spnjDMGcUCA]http://www.youtube.com/watch?v=spnjDMGcUCA#t=296[/video]
 
PetFlora

PetFlora

Well-Known Member
SDS, where you been... what you been up to?

I was gifted 2 ufo 90s (3500 + 5000) using helios diodes. Once buds set I added 3 x 4ft @ 18w 3000K tubes= ~ 220w

2 clones (BrandX poly WH x WW pollinated by BGum) almost finished.

No primary leafs due to me screwing up 3 weeks ago when mixed 200ppms of Sea Crop minerals + 400ppms of V+B, or 33.3% minerals. Dumb ass.:wall:

In carpentry the saying is measure twice- cut once.

Within days leafs were crispy and mottled. Drained rez added fresh nutes and they recovered nicely with lots of small green leafs

Nuggz are rock hard

Pics taken this morning

View attachment 2996510View attachment 2996511


stardustsailor said:
...While the truth stays somewhere between two minds.
Somewhere between Guod and Stardustsailor...
Hell ,yeah!


To Guod with R-E-S-P-E-C-T :

[video=youtube;spnjDMGcUCA]http://www.youtube.com/watch?v=spnjDMGcUCA#t=296[/video]
Click to expand...
 
stardustsailor

stardustsailor

Well-Known Member
WOW !
The 'known ' spectrum ?

Nice thick stems .
Green to the bottom .:shock:..
..
One light...
Watts ?

Great efficiency somewhere there,I'm sure , Guod.

Have you taken the moms for a shower ?
:P
Or there's their actual ' habitat ' ?
(I'm asking about the side -reflections ...)

Probaly some lenses there ?

And ...It was about time ,brother ...
( Any new DIY plans in your mind ,if I'm allowed to ask ,Guod ? )

I want the rep button ,ASAP back in it's usual place !
 
PetFlora

PetFlora

Well-Known Member
The fan grill is kinda dirty.

A filter perhaps

would you/are considering replacing with COBs?

It's amazing how quickly the led tech is changing
 
guod

guod

Well-Known Member
Veggie by NASA

"Veggie weighs 7.2 kg and requires 115 Watts of power. While stowed Veggie requires 0.02 m3 and deployed it requires 0.11 m3 of space. Veggie has a *growing area* of 0.16 m2 with a maximum growth height of 45 cm. The hardware is cooled with cabin or avionics air. The Veggie light sources are red (640 nm) 300 micromole/m2/s, green (540 nm) 30 micromole/m2/s and blue (440 nm) 50 micromole/m2/s."

http://www.nasa.gov/mission_pages/station/research/experiments/Veggie.html

*“The internal growing area is 11.5 inches wide by 14.5 inches deep, making it the largest plant growth chamber for space to date,” Massa said.*

so no cob, no apache in space

http://www.disclose.tv/action/viewvideo/169931/The_Space_Station_Will_Soon_Have_Its_Own_Garden_Veggie__NASA/
 
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