Astir Grow Led Panel Project...

[Bumping Spheda]

Yes, 23% is not the best. I think there are 640nm-660nm high power LED's that are ~30% efficient.

When they get back from holiday I should ask them what the efficiency of their 5200K, 0.4W LED's are. I'd imagine they'd be better than the 3000K and then you could supplement with some nicely efficient 1W Red/Deep Red's that are compatible with the Astir mcpcb.

I do like your idea of mixing the Yuji LED's with standard Blue pump Whites, too. Like SDS has said himself, you should be choosing a wide variety of wl's and CCT's as your source of food for your plants. The Yuji definitely brings something to the table, but even using them sparingly in your ratios should yield most of the benefit, imo.

Perhaps:
2 x Yuji 3000K
1 x standard WW
2 x standard NW
2 x Red
1 x Hyper Red

 

[speedyganga]

Hi,
yes I would probably go for only white and a bit of hyper red if using this 3000K led.
Because a spectrum composed of Yuji 3000 and normal WW would give two peak of blue: 405 and 450, and two peak of red 600 and 630nm
then you just add a bit of 660 and all is here...

Maybe a 5:2 ratio would be good you're right.

Is these led suitable for standard astir MPCB?
have you got some bright normal WW ? I am definitely looking forward to find some, but I can't find some good WW with 130-140lumen/W and relatively cheap.

see ya,

 

[Bumping Spheda]

Sorry, off the top of my head I don't know of a high quality source for Warm White LED's that are compatible with the Astir mcpcb. If I'm not mistaken, Yuji does make high CRI, Blue pump LED's that should fit. That being said, low CCT, high CRI and high lumen/Watt don't usually all coincide. It's sort of like one of those "pick 2" scenarios.

 

[Bumping Spheda]

Quick update on the Yuji LED's. I asked about pricing, CCT, CRI, and R9 values of their 1W Blue pump Warm White LED's. For Blue pump Warm White's they can achieve a CRI of >90 and an R9 value of 60-70 @ $0.68/unit for 50 units. R9 value for their Blue pump LED's is not as good as the Violet pump. There's also some development on the 1W Violet chip. Have yet to hear more about the 3 x 0.4W LED.

The violet chip technology is inherently different and uses a different type of phosphor conversion (red, green, blue) as opposed to the blue chip + yellow, green, red phosphors. This affects the R9 value which is actually very sensitive to small changes in color composition. Surprisingly, we can get an R9 of 90 if we use a neutral white, since neutral white requires a less complicated phosphor mix. The bottom line is that when we’re dealing with a single R index measure, it becomes very hard to control it when we’re working with so many other factors such as CIE chromaticity, CCT and overall CRI.

I’ve just checked with our production department on the status of the 1W housing violet chip. There’s been a bit of a backup with many other orders for high CRIs lately so they won’t be able to get us data until next week. Another issue that’s come to our attention is that the violet light from the chip could cause discoloration in the optics of the 1W housing. We believe that using a glass lens would resolve this concern, however, we might need a little extra time to procure the glass lenses as well.

Since the 1 W blue chip is a standard type LED I’m thinking we can get started on those and you can begin evaluating them. For your sample quantity of 50 units our price is 0.68 USD / pcs.

I've heard of lens discoloration even with Blue LED's. Glass lenses sound rather efficient and long lasting/durable. I'm pretty sure UV/IR LED's use glass, don't they? Glass sounds like a logical development for all/most LED's, right? Degraded optics over time is a known issue that can be treated, to an extent, but by no means cured, tmk.

 

[Bumping Spheda]

1W Violet pump package has been finished.



192.9 mW out / 1205 mW in = 16% efficiency

Aye aye aye. I just bought a CMH bulb.



92 CRI (nom) Ra8 (no R9 value, but judge the SPD yourself)
2800 K
100 Lm/W

 

[Positivity]

This was quite the informative thread. Read the whole darn thing.


SDS>> didn't realize you were that involved in putting panels together. Thanks for sharing all of your work with fellow growers. There were more than a few times you went over my head with a few of your studies, leaf testing, and sources cited....lol.


Tons of great food for thought to try and get to the ideal spectrum. Looks to be quite close with high gpw and top quality.
I really had no idea 350ma driven, cheap leds could do so well.


I've got some personal observations coming in on UVB right now. I put a Arcadia t5 UVB in my tent. I ran out of headroom and my UVB ended up literally two inches from some tops, farther on others. Guess which tops are the most frosted. The tops right next to the uv has trichs popping up everywhere. Stems, underside leaves, fan leaves....everywhere! I'm sure it will hurt yield as growth is a little slower on close tops, but I was expecting death being so close. Not the case at all, still green and healthy. UVB will definitely be a part of all my grows until I see different from here out. I think it's another important piece of the spectrum that's missing on a lot of indoor grows. Will post some uv treated pics next chance I get..

 

[stardustsailor]

Thank you ,brother Positivity ...
...
Yes ,I know ....
...
There were more than a few times you went over my head....

To 'shooth' the mind :
Music ....
Say some Tuareg Blues ?
Oh,those Berber chords ....
[video=youtube;nA1g4zBJYio]http://www.youtube.com/watch?v=nA1g4zBJYio[/video]

 

[PetFlora]

Pardon my ignorance, but if you are getting almost as much out as you are in then wouldn't the efficiency be the inverse- ~ 84%?

1W Violet pump package has been finished.

View attachment 2884648

192.9 mW out / 1205 mW in = 16% efficiency

Aye aye aye. I just bought a CMH bulb.


View attachment 2884681
92 CRI (nom) Ra8 (no R9 value, but judge the SPD yourself)
2800 K
100 Lm/W

 

[stardustsailor]

Tricky .......




The LED lighting module uses a commercially available, 26mm diameter dome shaped remote phosphor developed by Intematix that converts blue light to on-the-black-body-line 6000 K daylight spectrum and 70CRI with conversion efficacy of 267 lumens per radiant watt. The design is applicable for round and linear module configurations and is offered in color temperatures ranging from 2700 K to 6000 K with CRI values from 70 up to 98.

http://www.led-professional.com/products/led-modules-led-light-engines/intematix-announces-remote-phosphor-led-lighting-module-delivering-203-lumens-per-watt

 

[stardustsailor]

Powerful, efficient long-life light sources are enormously important for lighting systems that are in operation for many hours day and night, such as those used in commercial horticulture, architainment and stage lighting. The latest chip developments make the new generation of Oslon SSL LEDs even more attractive as light sources that precisely meet these requirements. They offer high efficiency and good thermal stability, combined with a low thermal resistance of 7 K/W.

Depending on the wavelength (590 nm - 660 nm) the new LEDs achieve per increases of 10 to 20 percent. The flagship is the Hyperred version (660 nm) that hits this 20 percent mark. With a brightness of 400 mW at an operating current of 400 mA the LED is much brighter than the predecessor model. It converts 46 percent of the current into light. At an operating current of 350 mA it achieves an impressive 355 mW, which corresponds to a conversion rate of 49 percent. What’s more, the LED has a long life: At an operating current of 700 mA and at a temperature of 80°C it will last more than 100,000 hours (L70/B50).

http://www.led-professional.com/products/leds_led_modules/boost-in-led-performance-up-to-20-more-light-and-improved-thermal-stability-in-red-orange-and-yellow

 

[stardustsailor]

LedEngin Deep Red LEDs with typical peak wavelength of 660 nm significantly enhance chlorophyll absorption in the most significant photosynthesis action zone for vegetable and plant growth, flowering and budding.

The combination of proprietary LedEngin packaging technology with advanced material developments enables a high quality light source with industry leading radiant power density. LedEngin's LEDs are engineered to optimize energy extraction, minimize stress and maximize thermal performance, resulting in monumental reliability, wavelength point stability and radiant power maintenance. Target markets for these products include horticultural and medical therapeutic applications.

"We are very excited about the addition of Deep Red high power LEDs to our product portfolio," said Uwe Thomas, Director of Technical Marketing at LedEngin. "Our new Deep Red products combined with Blue LEDs offer a unique alternative to conventional light sources for horticulture applications. The combination of high power density and high moisture resistance will enable the development of new horticulture fixtures which capitalize on the energy efficient, highly robust, and long lasting benefits of LEDs. We look forward to supporting our customers in their design-in activities," added Thomas.

http://www.led-professional.com/products/leds_led_modules/ledengin-inc.-announces-production-release-of-its-5-and-10-watt-deep-red-high-power-led-products

 

[Positivity]

I looked at getting ledengin deep reds initially. It seems they have been surpassed in efficiency by Philips and osram. Maybe there are other qualities to consider other than efficiency? Spectrum peaks, color stability, overall emitter strength? I'd love to see these emitters put up against each other in actual testing. Set of clones with everything else being equal other than deep red selection.

Ideally you would just make say ten or twenty mini chambers of low wattage. Then test emitters and spectrums quickly and efficiently. As nice as numbers and data sheets are, they really are just precursors to actual testing.

But also, it seems more than a few emitter choices and spectrums work well. Maybe all that really matters is the evolution of leds into higher efficiency and better performance of phosphors. If a warm white led could maintain the high output of a cool white, that would probably trump a 630nm or 660nm emitter selection.

 

[Positivity]

Intematix New Red Nitride Phosphors Offer Superior Performance for Demanding LED Applications




Intematix Ruby Series, backed by latest Intematix patent, is ideal for high-quality LED lighting




FREMONT, Calif. – Intematix, a leading innovator of patented phosphors and phosphor components for high-quality LED lighting, today announced the release of the Ruby series of red nitride phosphors that enable exceptional efficacy, color rendering and reliability for high-power LEDs. These unique phosphors, backed by Intematix U.S. patent No. 8,274,215, are ideal for applications like general lighting and backlighting for LCD TVs.


“Building on a decade of innovative work in phosphor, our substantial investments in materials and process research led to this breakthrough in both moisture stability and quantum efficiency where customers need it most,” said Yi-Qun Li, Chief Technology Officer for Intematix. “These properties of our Ruby red nitride help ensure that customers will see long lifetimes and consistent performance across the operating conditions of their LEDs for all lighting applications.”


Red nitride phosphors fill crucial gaps in the color spectrum and create quality light in the most demanding applications. Intematix red nitrides in combination with Intematix GAL phosphor enable near-perfect color rendering up to 98 CRI. Intematix red nitrides used in blends with GAL phosphors also enable 100 lm/W efficacy in warm white packages.


Intematix’s U.S. Patent No. 8,274,215 is the 18th U.S. patent issued to Intematix in the area of LED phosphors and the 71st U.S Patent overall. Intematix also has over 300 pending patent applications covering LED phosphor and lighting technologies on a world-wide basis. The Ruby series expands the company’s wide range of phosphors, adding to its extensive portfolio of nitride, silicate, aluminate, and garnet phosphors. For more information on Intematix phosphors and intellectual property please visit www.intematix.com.

 

[outman]

Thank you ,brother Positivity ...
...
Yes ,I know ....
...
There were more than a few times you went over my head....

To 'shooth' the mind :
Music ....
Say some Tuareg Blues ?
Oh,those Berber chords ....
[video=youtube;nA1g4zBJYio]http://www.youtube.com/watch?v=nA1g4zBJYio[/video]

Great music, as always.. Have a good time friend!

 

[stardustsailor]

"We 've to fight according to the rules of democracy "......

[video=youtube;Adfb17JQYtg]http://www.youtube.com/watch?v=Adfb17JQYtg[/video]

Hmm...I (also) come from a place that words like "Love" ,"Peace" , and ...."Democracy",
are ( and were ,since their 'birth' ) severely 'abused '...

F@#$ ...

Music speaks the truth.

 

[ganja 2]

if ,,,,

Music speaks the truth.

then why not sing every day ???

 

[stardustsailor]

Or dance ?
[video=youtube;Rg_S6WBqj2A]http://www.youtube.com/watch?v=Rg_S6WBqj2A[/video]

 

[PetFlora]

FYI, just in case you don't know- http://www.electronicproducts.com/Packaging_and_Hardware/Prototyping_Tools_Equipment_Services/How_to_build_your_own_PCBs_with_very_accurate_lines.aspx

 

[stardustsailor]

FYI, just in case you don't know- http://www.electronicproducts.com/Packaging_and_Hardware/Prototyping_Tools_Equipment_Services/How_to_build_your_own_PCBs_with_very_accurate_lines.aspx

Pet ,I've printed enough pcbs with this way ( both metal core and Fiber/epoxy ),that I'm pretty sure,i can do it blindfolded ,by now ...
FYI,just in case you didn't know ....

( I've made myself by now,using my DIY pcbs :

a) 1 GHz frequency Counter ,with GPS Time Base Calibration , computer controlled via usb.
b) 0,1 Hz -10MHz Function Generator ( Sine,Square,triangle,saw) with phase/freq modulation and sweep fuctions,computer controlled via usb.(Based on a LeCroy Schematic )
c) Ultra high precision Linear power Supply 1,25-30 volts DC , 20 A .
d)My GD-SDS Led Grow lights ,of course ..
e)...and many more small stuff ,like signal generator, digital dc voltmeter with up to 2000 Volts ,measuring ability (!!! ) and so on ...

Everything ,using my own ,DIY,hand made pcbs ....

.....
Yeap...I can do it blindfolded ,by now ..
I'm bettin' on it ...

 

[lax123]

woot making own pcbs...paid like 9,9$ to get 5x -> 5cmx5cm pcbs, 2 weeks including shipping..send from China, but great Quality, but Quality also depends on the layout and Routing skills