Old news for potheads ...

[FranJan]

the term refers to the type of chip, what your showing here is arrays of CSP, Cree XQE for example is a CSP

OooooooooKay XQE's are not CSP or the CSP design I'm talking about. And I know it's an array I'm showing so please stop trying to insult my intelligence or score brownie points off of me or whatever it is you're doing.

Take a hike salesboy. Don't you have a commission to earn somewhere????????

 

[sanjuan]

To CSP, or not to CSP? http://www.ledsmagazine.com/articles/print/volume-12/issue-4/columns-departments/commentary/to-csp-or-not-to-csp.html

"Lesaicherre said that Lumileds is the first LED manufacturer to develop and sell an LED in a CSP format. CSP implies that the package, or lack thereof, is essentially the same size as the die. Indeed, the Lumileds Flip Chip LEDs fit in the exact same footprint as the die. The only additions are the bonding pads on the bottom of the die that are optimized for a standard reflow soldering process." http://www.ledsmagazine.com/articles/2013/02/philips-lumileds-announces-bare-led-die-and-new-multi-emitter-components-at-sil.html

 

[welight]

OooooooooKay XQE's are not CSP or the CSP design I'm talking about. And I know it's an array I'm showing so please stop trying to insult my intelligence or score brownie points off of me or whatever it is you're doing.

Take a hike salesboy. Don't you have a commission to earn somewhere????????

Wow brother you guys fire up, just giving you the facts my man, check the post below your response, thats pretty concise and accurate, the die is fundamentally the size of the package and are bondless, anything different about that Im missing, thats why I said Cree don't quite get it, just a new name for something thats been around a while now
Cheers
Mark

 

[stardustsailor]

Very interesting report to read,fellas ...
Check this out :

**controlled environment agriculture (CEA)**





http://www.manifestmind.com/wp-content/uploads/MMQ314HL-Advanced-Lighting-for-Indoor-Agriculture.pdf


(...) marijuana cultivation drives advancements in lighting technologies
that eventually benefit the wider market. (...)
!!!
.....


"several scientific studies " .....
Versus hundreds if not thousands private grow ops ,using white LEDs ....

Old news for potheads ...
We remain several steps ahead ....

 

[stardustsailor]

BTW ...
God made weed ,man made BIA 10-2474...
Who do you trust ?
......
Lockpickin' open doors ....or playing with fire ?
THC and the rest of natural occuring cannabinoids are here for some thousands of years ...
No ...Ain't that enough ...1 dead & 4 other brain dead ...
They needed-five more - proofs ,I guess ...

 

[nogod_]

Never the former, seldom the latter.

I'll stick with the Devils cabbage.

BTW ...
God made weed ,man made BIA 10-2474...
Who do you trust ?
......
Lockpickin' open doors ....or playing with fire ?
THC and the rest of natural occuring cannabinoids are here for some thousands of years ...
No ...Ain't that enough ...1 dead & 4 other brain dead ...
They needed-five more - proofs ,I guess ...

 

[stardustsailor]

Abstract:
A growing number of evidence shows that plants benefit from a presence of green light in a spectrum of a light source. Green light is transmitted through plants' organs and is efficiently utilized in deeper layers of cells and in intracanopy leaves. Green diodes are sometimes used in LED luminaries. Optionally green light can be provided as a part of a spectrum of more efficient white LEDs. Yet the effect of broad-spectrum LED light on plant growth is not fully understood. We compared the growth of green and red cultivars of basil, Ocimum basilicum under blue-red-green (BRG), blue-red-white (BRW) and red-white LED light regimes of the same photon flux density and the same blue:red ratios. No significant difference was observed in biomass accumulation, leaf production and branching under green or white enriched spectra. Only red cultivar showed reduced growth under decreased blue:green ratio. Depending on the method used for the estimation, BRW regime consumed 10 to 20% less energy than the BRG regime.

http://www.actahort.org/members/showpdf?booknrarnr=1107_43

Basilicum has nothin' to do with Cannabis ...
Yet ..
An evidence for Basil ,may be a good indication for mj .....

No significant difference was observed in biomass accumulation, leaf production and branching under green or white enriched spectra.

So no difference ,what so ever in vegging basil plants ,no matter the combo used ,as long it has the same red:blue ratio
and same PPF ...
No matter if you use B-R-G monos combo ,or B-R-W .....or just Red +White ....
No blue leds ,no green leds needed ..

Another indication ...
Towards the pc R-W plant growth LED / COB or CSP...

The " White " part has to be a pc LED offering the flux of both the blue & green part of the PAR ...
The mind goes straightly to Osrams "Eq white " ...
" Equal white" ..A highly efficient "white " ( more of a cyan really ... ) with a small amount of broadband green phosphor Closely fiitting match ,maybe would be a 5700 K or even 6000 K 70 CRI pc white ....

http://www.osram-os.com/osram_os/en/applications/areas-of-competence/horticulture-lighting/index.jsp
http://www.osram-os.com/Graphics/XPic5/00199231_0.pdf/LUW CRDP (EQ white) (EnglishDeutsch).pdf

The red part ....
The tricky one ....
1) Red Rule #1 : Plants perform best when supplied with the whole 600-700 nm band ...
That means " broadband " red spectrum ...

One way is to use mono diodes ,of different wls ...
600-610-625-630-640-650-660-670-680-700 nm ...
Plenty to choose from and combine ...
Light distribution and LED driving might be an issue ...

Another way ...The Phosphor conversion ...
Not a very efficient way ,but it offers the "broadband" red spectrum ,on the other hand ...
Even some FR/NIr ...(sometimes more than enough ... )


Two main "channels" ,more than enough diversity ,regarding light quality ..

I still insist on that one ....

Till we see some advancements in efficiency of blue excitation chips and /or red phosphor efficiency ,
we're probably "stuck" with the "summer noon-lights " -as a like to call 'em - ,the 3000K / 4000 K 80 Ra ...
Not that they perform bad ...
But a push of light quality diversity ,might help a lot the -almost- conquered high light quantity

I say it's much better when you start the babies in a nice fresh "spring " environment ...
Mature during a sunny summer ...
And be harvested under late autumn conditions ...

Seems too much ?

Nah ...
Just think for a minute ,that the more our "art " is evolving ,
the more we get to know how nature works ...Or at least to make uor speculations ...

Learning our plants ..
Nothing is too much ..
Nothing is useless ...


R74:G18:B8



Cheers.

 

[PurpleBuz]

I say it's much better when you start the babies in a nice fresh "spring " environment ...
Mature during a sunny summer ...
And be harvested under late autumn conditions ...

Cheers.

while I generally agree with spring, summer and fall lighting for a crop cycle.

it does make one wonder about equatorial sativas, since they don't have spring summer and fall, rather they have rainy and dry seasons.

 

[Jeanpaulsastre]

Feel free to pick yours ...
View attachment 3583719

Wouldn't red 625 and blue 465 led plus some 6400K 5400K 2700K 3000K And UVA UVB light be enough or is there something else I need? (leaving wattage aside)

 

[PSUAGRO.]

OooooooooKay XQE's are not CSP or the CSP design I'm talking about. And I know it's an array I'm showing so please stop trying to insult my intelligence or score brownie points off of me or whatever it is you're doing.

Take a hike salesboy. Don't you have a commission to earn somewhere????????

lol.................someone's cranky

 

[FranJan]

lol.................someone's cranky

No, I just don't feed the strays like you guyz do .

Lotsa Green @stardustsailor . If it's true it's big news for LEDs and +1 for RGB whites but it ain't gonna be cheap I bet so.....

UK Teams Up To Bridge LED Green Gap With 3C GaN
Plessey, Anvil Semi and the University of Cambridge are to build ‘3C’ GaN LEDS in an attempt to bridge the ‘green gap’ – a band of wavelengths around green where LED efficiency dips.
http://www.electronicsweekly.com/news/research-news/uk-teams-up-to-bridge-led-green-gap-with-3c-gan-2016-01/

More Info:
http://www.electronicsweekly.com/news/research-news/more-on-uk-tackles-led-green-gap-with-cubic-gan-2016-01/
​

3C - also know as 'cubic' - silicon carbide (SiC) showed early promise for power semiconductors, but fabrication difficulties meant it was dropped in favour of hexagonal (4H) crystal SiC, which has a higher bandgap and is more temperature dependent. By pre-trenching wafers to form stress-relieving gaps, Coventry-based Anvil Semiconductors has found a way to make 3C SiC - and is experimenting with Schottky diodes and mosfets made from it. SiC can be used as a substrate for growing LED-grade GaN (as Cree does), and right from the start Anvil has been proposing making 3C GaN on 3C SiC for LEDs. Using Anvil techniques, LED guru Professor Colin Humphreys of the University of Cambridge has grown 3C GaN on 3C-SiC-on-Si wafers by MOCVD "The properties of cubic GaN have been explored before, but the challenges of growing this thermodynamically unstable crystal structure have limited its development," said Humphreys. "The quality of Anvil's cubic SiC-on-Si substrates and our experience of developing conventional GaN LED structures on large wafers have enabled a breakthrough in material quality."

Humphreys' lab was also the source of the GaN-on-Si technology which (via spin-out CamGaN) underpins Plessey's lighting-grade LED fab in Plymouth. At the moment it grows conventional blue LEDs, using hexagonal GaN-on-Si, on wafers up to 150mm (6inch). Now all three organisations have teamed up with funded by Innovate UK (from the £14m Energy Catalyst Programme) to grow 3C GaN-on-SiC-on-Si LEDs. "Cubic GaN has the potential to overcome the problems caused in conventional LEDs by the strong internal electric fields which impair carrier recombination and contribute to efficiency droop," said Plessey. "This is particularly true for green LEDs where the internal electric fields are stronger and are believed to cause a rapid reduction in efficiency at green wavelengths."

Anvil makes 3C-SiC on 100mm silicon wafers. "The process is readily migrated onto 150mm wafers, and potentially beyond, without modification and is therefore suitable for large, industrial-scale applications," said Plessey. "The availability of cubic GaN from a readily commercialisable process on large diameter silicon wafers is as a key enabler for increasing the efficiency of green LEDs."

"This will, for the first time, deliver green LED devices with efficiency approaching that in blue and red LEDs," said Humphreys.

 

[Jeanpaulsastre]

http://agi32.com/blog/2014/12/10/photometry-and-photosynthesis/
This blew my mind

 

[BuddyColas]

http://agi32.com/blog/2014/12/10/photometry-and-photosynthesis/
This blew my mind

I am just reading that now...what are your top 3 "take aways" from that article? Thanks.

OK, so I finished reading the article. The math a bit over my head. But I am pragmatic if not a math genius. So here are my top 3 "take aways:"

White COBs are awesome growing machines (we knew that).

White LED light is easier to measure than mono LED light.

A LUX meter reading in K times 15 (an average of 3-4K LEDs) gives a “ball-park” PPFD reading. Shweeet!

Thanks for sharing!

 

[sethimus]

photons < more photons < lots of them

 

[BuddyColas]

photons < more photons < lots of them

An even MORE pragmatic summary!


Being a Treky and likening a COB panel to The Enterprise:

Ensign, “The top-less girls are right below us Captain.”

Captain, “Excellent! Fire when ready. And keep the photon torpedoes going non-stop until we see their bulbous, sticky girl-parts!”

Ensign to himself, (Oooohhhh yeaaaaaahhh!)

 

[nogod_]

I don't know about you but I've got no room for topless ladies under my lamp

An even MORE pragmatic summary!


Being a Treky and likening a COB panel to The Enterprise:

Ensign, “The top-less girls are right below us Captain.”

Captain, “Excellent! Fire when ready. And keep the photon torpedoes going non-stop until we see their bulbous, sticky girl-parts!”

Ensign to himself, (Oooohhhh yeaaaaaahhh!)

 

[BuddyColas]

I don't know about you but I've got no room for topless ladies under my lamp

I mean topless as in bare, exposed, girl parts out for all to see!

 

[Jeanpaulsastre]

I am just reading that now...what are your top 3 "take aways" from that article? Thanks.

OK, so I finished reading the article. The math a bit over my head. But I am pragmatic if not a math genius. So here are my top 3 "take aways:"

White COBs are awesome growing machines (we knew that).

White LED light is easier to measure than mono LED light.

A LUX meter reading in K times 15 (an average of 3-4K LEDs) gives a “ball-park” PPFD reading. Shweeet!

Thanks for sharing!

I'd say the math is a little bit over my head too but I can use the formulas to obtain proper values, mainly because the conversion factors are given in the article.
The consolidation of an almost official measuring unit and proper terminology that should be used to describe (as it's done in the article) color's frequency, temperature, absorption and photosynthetic activity by the plant. Plus, the article relates this parameters with quantum yield for CO2 uptake, giving us the lead for what's next to develop. Reach for the sun Icarus!

 

[Jeanpaulsastre]

I tie them down with wool and screws while they mature and become sexually active, then I cut some of it's small parts and finally starve them to death before they get too old, just so I can smoke their wombs.

 

[stardustsailor]

No, I just don't feed the strays like you guyz do .

Lotsa Green @stardustsailor . If it's true it's big news for LEDs and +1 for RGB whites but it ain't gonna be cheap I bet so.....

UK Teams Up To Bridge LED Green Gap With 3C GaN
Plessey, Anvil Semi and the University of Cambridge are to build ‘3C’ GaN LEDS in an attempt to bridge the ‘green gap’ – a band of wavelengths around green where LED efficiency dips.
http://www.electronicsweekly.com/news/research-news/uk-teams-up-to-bridge-led-green-gap-with-3c-gan-2016-01/

More Info:
http://www.electronicsweekly.com/news/research-news/more-on-uk-tackles-led-green-gap-with-cubic-gan-2016-01/
​

3C - also know as 'cubic' - silicon carbide (SiC) showed early promise for power semiconductors, but fabrication difficulties meant it was dropped in favour of hexagonal (4H) crystal SiC, which has a higher bandgap and is more temperature dependent. By pre-trenching wafers to form stress-relieving gaps, Coventry-based Anvil Semiconductors has found a way to make 3C SiC - and is experimenting with Schottky diodes and mosfets made from it. SiC can be used as a substrate for growing LED-grade GaN (as Cree does), and right from the start Anvil has been proposing making 3C GaN on 3C SiC for LEDs. Using Anvil techniques, LED guru Professor Colin Humphreys of the University of Cambridge has grown 3C GaN on 3C-SiC-on-Si wafers by MOCVD "The properties of cubic GaN have been explored before, but the challenges of growing this thermodynamically unstable crystal structure have limited its development," said Humphreys. "The quality of Anvil's cubic SiC-on-Si substrates and our experience of developing conventional GaN LED structures on large wafers have enabled a breakthrough in material quality."

Humphreys' lab was also the source of the GaN-on-Si technology which (via spin-out CamGaN) underpins Plessey's lighting-grade LED fab in Plymouth. At the moment it grows conventional blue LEDs, using hexagonal GaN-on-Si, on wafers up to 150mm (6inch). Now all three organisations have teamed up with funded by Innovate UK (from the £14m Energy Catalyst Programme) to grow 3C GaN-on-SiC-on-Si LEDs. "Cubic GaN has the potential to overcome the problems caused in conventional LEDs by the strong internal electric fields which impair carrier recombination and contribute to efficiency droop," said Plessey. "This is particularly true for green LEDs where the internal electric fields are stronger and are believed to cause a rapid reduction in efficiency at green wavelengths."

Anvil makes 3C-SiC on 100mm silicon wafers. "The process is readily migrated onto 150mm wafers, and potentially beyond, without modification and is therefore suitable for large, industrial-scale applications," said Plessey. "The availability of cubic GaN from a readily commercialisable process on large diameter silicon wafers is as a key enabler for increasing the efficiency of green LEDs."

"This will, for the first time, deliver green LED devices with efficiency approaching that in blue and red LEDs," said Humphreys.

Yeap..I've already read about it ....Here :
http://www.led-professional.com/technology/light-generation/plessey-builds-leds-in-cubic-gan-on-3c-sic-si-to-overcome-the-green-gap

Cheers.