Optimum Spectrum for Veg?

[cobshopgrow]

i where just waiting for you recommending these .

but consider the op use gen3 EB3 4000K 90cri allready and isnt happy.
think the thrive and the gen1 are similar inefficient, arent they? in regards to lumen per watt. not PFFD of course.
while you would agree that the spectrum of the vestas are quite nice and may worth a try
would like to know how the thrive veg.

 

[Rocket Soul]

i where just waiting for you recommending these .

but consider the op use gen3 EB3 4000K 90cri allready and isnt happy.
think the thrive and the gen1 are similar inefficient, arent they? in regards to lumen per watt. not PFFD of course.
while you would agree that the spectrum of the vestas are quite nice and may worth a try
would like to know how the thrive veg.

Id be ganged up if i could only find a local chapter of the Vesta-gang lol

I think ops problems is due to overlighting his veg: 19w peer foot is veg is about the same dli as 30w a foot in flower, a bit too much i think.

Weve had a fair few problems in veg (3000k 80cri) so this is something ive given thoughts and reading ups on and im of the belief that having some blue on tap is the first extra channel to be added to any light, mainly due to its effect on transpiration. If you cannot control transpiration with climate (hard to have your veg in the right temp when low wattage led heats so little) then having some extra blue, or even violet, is really nice.

As for OP: theres always the option of using Vesta Thrive.

 

[ilovereggae]

\

Id be ganged up if i could only find a local chapter of the Vesta-gang lol

sorry couldn't help myself

i nominate @Rocket Soul as our worldwide President

 

[Rocket Soul]

\

sorry couldn't help myself

i nominate @Rocket Soul as our worldwide President

View attachment 4786315

Id settle for a "I repped Bridgelux Vesta and all i got was this shitty T-shirt"-T-shirt.

 

[Rocket Soul]

Also missing from this discussion is vegging with cmh, damn near to perfection in vegg.

 

[Kassiopeija]

Also missing from this discussion is vegging with cmh, damn near to perfection in vegg.

well, once the OP brought efficacy into play many spectrum options faded as you can't have your cake and eat it too. I find most white LED diodes spectrum have basically the same spectrum (in their multiple K variations). The only ones that differ seem to be these "sunlike" broadbands like this one

i nominate @Rocket Soul as our worldwide President

of the RIU CSC XD

 

[brazzik25]

 

[rkymtnman]

Also missing from this discussion is vegging with cmh, damn near to perfection in vegg.

also missing eye horti blue daylight MH. was a great veg bulb but runs very hot.

how about a cheap-o blurple using just the veg setting where it's mostly blues??? it's been a decade since i ran it but from what i remember it vegged very well too.

i'm trying a T5 4 bulb with 2 6400K and 2 actinic blue bulbs right now. it's a weird color but i haven't run it long enough to see if the plants like it.

 

[tilopa]

Also missing from this discussion is vegging with cmh, damn near to perfection in vegg.

Back in the day I vegged with hortilux blue MH. For the last couple years I've been using cmh. I hate cmh, they always contribute to stretchy lanky plants. If you look at the cmh spectrum (even the 4k) they have very little blue. Maybe I'm not using the right cmh system, but I'm done with cmh.

I've been doing some research trying to find information on how much blue is needed and how much is too much. I've heard it said by a couple sources that too much blue in veg will cause your plants to be stunted and even stressed, but they don't back that up with data. And their definition of too much it over 40%. Bugbee in one of his youtube videos mentioned something about 20% blue in veg helping to keep your plants from stretching, but did not say if that was optimum or if more than that would be detrimental.

I don't want to overthink the whole thing but I am having issues with 4k cri90 that has more blue than a typical 4k. However, you are right Rocket, I over did it on the wattage, and have since dialed the current back and raised the lights and the plants are now "praying" when before they were not. I'm taking Cobbs advice and looking at them right before lights out and they could use a little more. So, some dialing-in seems to be necessary with such lights.

Yet I'm needed to buy more veg lights so the question still remains for me how much blue is too much.

BTW- I also raised my heat and humidity and that had a visibly positive effect on the plants.

 

[loco41]

Back in the day I vegged with hortilux blue MH. For the last couple years I've been using cmh. I hate cmh, they always contribute to stretchy lanky plants. If you look at the cmh spectrum (even the 4k) they have very little blue. Maybe I'm not using the right cmh system, but I'm done with cmh.

I've been doing some research trying to find information on how much blue is needed and how much is too much. I've heard it said by a couple sources that too much blue in veg will cause your plants to be stunted and even stressed, but they don't back that up with data. And their definition of too much it over 40%. Bugbee in one of his youtube videos mentioned something about 20% blue in veg helping to keep your plants from stretching, but did not say if that was optimum or if more than that would be detrimental.

I don't want to overthink the whole thing but I am having issues with 4k cri90 that has more blue than a typical 4k. However, you are right Rocket, I over did it on the wattage, and have since dialed the current back and raised the lights and the plants are now "praying" when before they were not. I'm taking Cobbs advice and looking at them right before lights out and they could use a little more. So, some dialing-in seems to be necessary with such lights.

Yet I'm needed to buy more veg lights so the question still remains for me how much blue is too much.

BTW- I also raised my heat and humidity and that had a visibly positive effect on the plants.

Does the 4k 90cri have more blue than the 80cri ones? I always read that the higher cri catered more to the red spectrum, so overall the 90cri would have a higher red percentage resulting in a lower blue percentage than their standard 80cri counterparts. I thought it was about the surface area under the graphs as far as determining the percentages of the three (blue/green/red) not necessarily where the highest peak is. Glad to hear you are having better success with the current strips though. I bought a set of the 90cri 4k's a while back too, just nowhere to use it atm so haven't built/wired it up yet.

Sorry I hope this doesn't confuse anyone, just enjoying the knowledge being shared in this thread and was hoping for some clarification on my end as well about interpreting the color graphs in datasheets better. Hopefully someone will come along and clear it up.

 

[salmonetin]

Also missing from this discussion is vegging with cmh, damn near to perfection in vegg.

or missing from this discussion is vegging with inda-gro inductions lamps... son caras... pero siempre me gustaron sus spd...y ahora con uv en canal separado mas... pero en leds veo cosillas para este año...a ver que hacen este año en cree bridgelux...osram nichia etc

el tema del cri ...aparte de que para los humanos nos viene mejor los cri altos para distnguir mejor los colores de las plantas sanas o enfermas... para las camaras que esten filmando o sensando tambien les viene genial los cri altos...

un articulo interesante acerca del cri...la eficacia luminosa y le eficacia fotonica fotosintetica.... para los fotosinteticos bros...juasss...es bromaaa...

Are CRI and luminous efficacy influencing the photosynthetic photon efficacy?_ YUJILEDS

Are CRI and luminous efficacy influencing the photosynthetic photon efficacy?

www.yujiintl.com

por el like Bro RS te añado info... miraba dev kits en ledlightforyou...

Partner network - ams-osram - ams

Find our preferred external module & solution providers, independent design houses and manufacturers of complementary offerings and recommended components.

www.ledlightforyou.com

Partner network - ams-osram - ams

Find our preferred external module & solution providers, independent design houses and manufacturers of complementary offerings and recommended components.

www.ledlightforyou.com

a las florence les haria un tuneillo de los mios...y a las grow emity de cezos que tambien me gustaron....curiosas para mi tuneo...e inspirativas....ou yeahhh

o chequea IHS ...nueva para mi.... yo prefiero los leds mas separados y con thermal pads grandes para que tengan mejor disipacion....pero no creo les sea problema hacerlas a tu medida o manera...ya me gustaria que hicieran pcb circulares para suplementar los cobs... con azules rojos uv etc... otros blancos ... he visto pin fin heatsinks de 16 que podrian alojar un cob central y un aro pcb con los leds que quieras...o necesites.... y en canal (o mas) y driver/s aparte... un update para los cobs...welcome to the mix...

About IHS | IHS

www.i-hled.co.uk

Pick Your Own Growth Recipes - PYO LED Light Engines | IHS

www.i-hled.co.uk

Pick Your Own Custom LED Engines

PYO is a web tool that offers the ability to choose specific LED’s and place them in any position on a board of your choice. Created with a key R&D focus, PYO allows you to achieve the optimal lighting mix you need and create your own LED recipes.

www.rs-online.com

o EverlightEU...

Account Suspended

y mi paseo por los alemanes... mira tambien sus novedades......curiosos los leds osram que usan amen de otros leds... y los kits...inspirativos paseos...

LED-TECH.DE Online Shop

...para IES files...de osram... para usar con el Dialux Evo2...y hacerte una mejor idea visual teorica...

Partner network - ams-osram - ams

Find our preferred external module & solution providers, independent design houses and manufacturers of complementary offerings and recommended components.

www.ledlightforyou.com

mis humildes reyes para los Bros...doquiera que esten... mucho amor...

...oigo cosas sobre holandeses con leds Seoul sunlike...a ver si me entero de algo mas...los nichia optisolis tambien estan curiosos o eso me parecio ver... curiosas mezclas de cri dando resultado otro cri...y curiosos leds...los GLA australianos y el Teknik....que tambien me inspiran sin comprar o usar nada... ;--)

1-High Light "Red" LED Board OLD
30 Columnas x 15 Filas = 450 Leds
Red – 2700-2800 K cri 95

Colour
150 x 3 = 450x Mid-Power Nichia 3030 LEDs
100 x 3 = 300x Nichia 757 V3-F1 CRI 90 2700 K + ---CHANNEL 1--- WHITE BLUE ---DRIVER 1---
050 x 3 = 150x Nichia “Optisolis” CRI 97 2700 K = ---CHANNEL 2--- WHITE RED ---DRIVER 2--- CRI 95 2700 K – 2800 K

2-High Light "UV" LED Board
30 Columnas x 15 Filas = 450 Leds
UV – 3000 K cri 94

Colour
150 x 3 = 450x Mid-Power Nichia 3030 LEDs
100 x 3 = 300x Nichia 757 V3-F1 CRI 90 2700 K + ---CHANNEL 1---WHITE BLUE ---DRIVER 1---
030 x 3 = 090x Nichia “Optisolis” CRI 97 2700 K + ---CHANNEL 2---WHITE RED ---DRIVER 2---
020 x 3 = 060x Seoul Semi “Sunlike” CRI 95 6500 K UVA = ---CHANNEL 3---WHITE UVA ---DRIVER 3---
CRI 94 3000 K

3-High Light "420" Led Board NEW
30 columnas x 14 filas = 420 leds
420 - XXXX K cri xx

Colour
140 x 3 = 420x Mid-Power 3030 LEDs
080 x 3 = 240x B + ---CHANNEL 1--- WHITE RED ---DRIVER 1---
030 x 3 = 090x C + ---CHANNEL 2--- WHITE BLUE ---DRIVER 2---
020 x 3 =
= 040x R (660 nm) + ---CHANNEL 3--- RED ---DRIVER 3--- = 020x F (730 nm) + ---CHANNEL 4--- FAR RED ---DRIVER 4--- 010 x 3 = 030x V (405-420 nm) = ---CHANNEL 5--- UVA ---DRIVER 5--- CRI XX XXXX K

...i know the simplicity of one channel....but sometimes less is less posiblities on an better light control too...

...GLA must look at California Lightworks GHPR0 340...not look for her leds....but they uses mesthek lab...
...or must look to Valoya...again no look for her leds.. (or look her leds too). inspiratives brands... for my DIY...maybe GLA take some notes too...

....some channels on leds pcbs are maybe too complicated for some people... but for better light control...separate channels is the way to go...
....mix diferents leds on one driver its not ideal.... with same leds on same driver or channel (ideal) we can go on paralel or series way ....better than mixing diferents leds...to drive or control the leds...
....if fail one channel ...there are other....to auxiliate.... etc etc...

...we can update the drivers with better new ones too...or add light controllers...like meshtek lab...juasss

All Products | MeshTek

meshtek.com

...como decia sds solo para Brave Diyers....esos locos soñadores...especie en peligro de estincion?...no creo...

por cierto hoy vi esta curiosa SBC la 6560 powered by the Qualcomm® Snapdragon™ 660 Octa-core processor
The Snapdragon 660 processor, integrates Qualcomm® Kryo™ 260 Octacore CPU, Adreno™ 512 GPU, Hexagon™ 680 DSP, Qualcomm® AI Engine and the Spectra™ 160 dual ISP to enable advanced visual computing, enhanced graphics and on-device machine learning capabilities coupled with AI-enabled user experiences.
The Inforce 6560 SBC combines the heterogeneous compute capabilities of the Snapdragon™ 660 SoC with 2x2 802.11ac Wi-Fi, Bluetooth 5.x, a full featured USB-C interface with UltraHD display capability, an integrated battery charging circuitry with battery header, an on-board RTC and ample internal memory to make it a complete 4K encode/decode plug-n-play system.
Inforce 6560 SBC is guaranteed long-life supply and support commitment from Inforce Computing Inc.

...y las que SBC y dev boards que iran saliendo este año...ouyeahhh...

Search results for: ’6560’

Smart Wireless Computing | Inforce Computing, Inc Smart Wireless Computing is the leading creator of edge computing embedded designs powered by Qualcomm Snapdragon Processors. Utilizing Qualcomm’s AI Engine for Artificial Intelligence and Machine Learning enable deep learning via edge cloud...

www.inforcecomputing.com

y curioso el video que la acompaña...yo usaria la IA para otra cosa con otras camaras...para vigilar o sensar plantas...la multivision depredator en diy...juasss

otra cosa que vi usando a GLA y otros bros es el termino PAR... deberiamos usar mejor el termino PBAR.... ...photobiologicamente... es mas inclusiva...no es solo photosyntesis... y se ha visto hace mucho que hay fotosintesis mas alla del par tambien...
...ya se dijo hablando de los docs de ASABE 640 y 642.... pensaba que mas gente los habria leido o mirado...sobretodo los de las marcas de led grow ligths... pero siguen usando el par...yendo mas alla del par curioso....

pues actualmente vamos mas alla del par... en photomorfologia hay mas bandas que incluir mas alla del PAR...etcetc

...los sensores cuanticos de par...son como los luxmeter.... se quedaron como buenas aproximaciones....los quantum meter nuevos de amplio rango son la via a seguir...para el tema PBAR... este va de 340 a 1040 nm...

MQ-620: 340-1040 nm ePFD Meter

The MQ-620 ePFD meter is designed to measure beyond traditional PAR (400-700 nm) and is intended only for use in LED environments. It has a hand-held meter, attached via cable, that displays and stores measurements.

www.apogeeinstruments.com

o mira...a-tiny-spectroradiometer-measures-340-nm-to-1010-nm-for-agriculture...un nano spectrometer module for IoT...

A tiny spectroradiometer measures 340 nm to 1010 nm for agriculture

Daejeon Korea, June , 2020 – nanoLambda, a leading spectral sensor company, announced a new version of XL-500, with an extended range from 340 nm to 1010 nm, measuring UV, Visual...

www.ledsmagazine.com

https://nanolambda.myshopify.com/

https://nanolambda.myshopify.com/products/nsp32m_w1_temp

Saludos desde Tenerife

 

[salmonetin]

y de regalo propina de reyes...

....my others sensors POV....

I imagine the Thingy52 with other sensors...(best sensors for my pov)

Adafruit VEML7700 Lux Sensor - I2C Light Sensor

https://learn.adafruit.com/adafruit-veml7700?view=all

Adafruit BH1750 Light Sensor - STEMMA QT / Qwiic

https://learn.adafruit.com/adafruit-bh1750-ambient-light-sensor?view=all

Adafruit TSL2591 High Dynamic Range Digital Light Sensor - STEMMA QT

https://learn.adafruit.com/adafruit-tsl2591?view=all

RGB Color Sensor with IR filter and White LED - TCS34725

https://learn.adafruit.com/adafruit-color-sensors?view=all

Analog UV Light Sensor Breakout - GUVA-S12SD

Adafruit APDS9960 Proximity, Light, RGB, and Gesture Sensor - STEMMA QT / Qwiic

https://learn.adafruit.com/adafruit-apds9960-breakout?view=all

Adafruit AS7341 10-Channel Light / Color Sensor Breakout - STEMMA QT / Qwiic

https://learn.adafruit.com/adafruit-as7341-10-channel-light-color-sensor-breakout?view=all

SI1145 Digital UV Index / IR / Visible Light Sensor

https://learn.adafruit.com/adafruit-si1145-breakout-board-uv-ir-visible-sensor?view=all

Adafruit VEML6075 UVA UVB and UV Index Sensor Breakout

https://learn.adafruit.com/adafruit-veml6075-uva-uvb-uv-index-sensor?view=all

Sensirion SHT85...

https://www.digikey.es/product-detail/en/sensirion-ag/SHT85/1649-1110-ND/9666378

https://developer.sensirion.com/fileadmin/user_upload/customers/sensirion/Dokumente/2_Humidity_Sensors/Datasheets/Sensirion_Humidity_Sensors_SHT85_Datasheet.pdf

https://media.digikey.com/pdf/Data Sheets/Sensirion PDFs/HT_AN_SHTxx_STSxx_Design Guide_V1.1_D1.pdf

Bosch BME280/680....BMP390L...

https://www.adafruit.com/product/2652

https://learn.adafruit.com/adafruit-bme280-humidity-barometric-pressure-temperature-sensor-breakout?view=all

https://www.adafruit.com/product/3660

Adafruit BME680

The long awaited BME680 from Bosch gives you all the environmental sensing you want in one small package. This little sensor contains temperature, humidity, barometric pressure and VOC gas sensing capabilities. All over SPI or I2C, at a great price!

learn.adafruit.com

https://www.adafruit.com/product/4816

https://learn.adafruit.com/adafruit-bmp388-bmp390-bmp3xx?view=all

PT100/1000...

https://atlas-scientific.com/probes/pt-1000-temperature-probe/

https://www.whiteboxes.ch/shop/pt-1000-temperature-probe-with-bnc/

https://www.adafruit.com/product/3290

https://www.adafruit.com/product/3328

https://www.adafruit.com/product/3984

https://www.adafruit.com/product/3648

https://learn.adafruit.com/adafruit-max31865-rtd-pt100-amplifier?view=all

NDIR CO2 Sensor...

https://atlas-scientific.com/probes/ezo-co2-carbon-dioxide-sensor/

https://www.whiteboxes.ch/shop/ezo-co2-embedded-ndir-co2-sensor/

Capacitive Soil Moisture Sensors..

https://www.whiteboxes.ch/shop/i2c-soil-moisture-sensor/

...para sensores de ph ec etc ...tambien miraria los kits de Atlas Scientific...por su experiencia con ellos...

y unos links con info curiosa...

https://www.cannagardening.com/making_temperature_work_success

https://www.cannagardening.com/how_air_temperature_affects_plants

https://www.cannagardening.com/growers_tip_ventilation

https://www.cannagardening.com/practices_ventilation

https://www.cannagardening.com/principles_ventilation

https://www.cannagardening.com/growers_tip_need_light

https://www.cannagardening.com/effect_light_spectrum_plant_development

https://www.cannagardening.com/leds_plant_production

https://www.cannagardening.com/new_light_systems

https://www.cannagardening.com/effect-of-red-and-far-red-light-on-flowering

https://www.cannagardening.com/influence_of_colors


https://www.canna-uk.com/effect-of-red-and-far-red-light-on-flowering


https://www.growlightsource.com/far-red-flower-initiator-bud-booster/

https://www.growlightsource.com/how-to-accelerate-bud-production-and-quality-with-the-far-red-730n-flower-initiator/


https://news.californialightworks.com/how-does-the-far-red-light-spectrum-affect-plants/

https://news.californialightworks.com/how-do-plants-wake-up-and-go-to-sleep/

...hay mas info pero...por hoy ya esta bien de vino... juasss y como estan las papas yemahuevo arrugadas...mmmmm

just sweet dreams ...just sweet dreams... felices sueños de reyes...si nos dejan los Trump boys en Washington...como son niñatos ricos no les gusta perder...trump quieras o no eres un looser...y tus maneras des uniendo america... es de traca... no es estados unidos de america?... para ti unidos bajo tu yugo de niño rico blanco facha... ya te haras viejo trump...pero tu quieres pasar a la historia como el sentenciador a muerte en sus horas finales...patetico...toca pataleta de trump para rato...tipico de niñato rico blanco y malcriado... ojala el odio que deja le persiga y le haga sufrir...que mal karma lleva...y merecido con creces...

...trump jodistes al pueblo saharaui hermano...y haz creado un gran problema a Canarias y por ende a ti mismo...dejando a marruecos ese territorio....ahora lleno de mafias traficando con toda clase de cosas raras...despues te quejaras de que te llegan inmigrantes terroristas....y es que se lo estas poniendo a huevo...y hace peligrar gravemente mi querida Canarias...con trafico mas que nada de gente...que transporta ¿que cosas?...¿las sabes tu?....cuidadinnn con mi zona Canaria que la has puesto en grave peligro... arrastrastes a los ingleses al brexit....y ya les adverti a los ingleses...que esta vez ponerse detras de las murallas y evitar la inmigracion que viene... los hace mas vulnerables a otros ataques...ellos ahora lo estan entendiendo por las malas... y les aparecio la variante inglesa del covid (casualidad?)...mas peligrosa...por mas contagiosa... se han tomado las medidas correctas con UK?...no...siguen circulando ingleses repartiendo su variante covid....por favor no vengais a canarias nos hareis un gran favor...y cuidadin que oigo hablar de otras variantes.... no hacen caso a la BIG DATA... y esta cantando datos por anticipado...de como estara el patio.... teneis la variante inglesa corriendo por USA?...cuidadinnnn...
...los ingleses decian que mandarian turismo si estamos en 25 casos por 100.000 habitantes... la big data nos dice que esa cifra en real es 10x ...o sea con 25 casos...en realidad estamos en 250 casos.... llegaremos a los 25 casos en canarias?...con la variante inglesa suelta...llegaran los ingleses o alemanes y franceses a bajar sus altas cifras actuales?...o no haran pcrs para que no aprezcan reflejadas las altas en casos en los numeros publicados...sigan maquillando datos para sus habitantes...salvar la economia y obviar la gente que caera... ya me suena a tema en bucle...
...y mientras sigue cayendo mas peña.... y la posibilidad de que mute con tanta gente infectada y hasta vacunada...esta ahi creciendo...
..y el tema vacuna va lento... OMG...

y los de iran enriqueciendo plutonio...y saltandose las advertencias... y con las mafias traficando de todo....ehh venezuela?.... cuidadinnn que conozco el patio... maduro otro niñato pobre nuevo rico corrupto y malcriado sin ganas de dejar el poder...otro como trump.... ya les vale... la de mafias que han sembrado por doquier...

...la union es importante se descosio mucho el mundo con trump...no lo deja nada facil el coserlo....

...hay que pensar en la toda la gente unida...colaborando en paz...las murallas o partidos no nos sirven esta vez...

You might wanna double-check anything you've read here on RIU in my posts..

It's a real rabbit hole when you get into it...welcome to my rabbit hole...of sharing things...

...ouyeahhh Wilson......add ...im old canary exelectrician...then no problem working with electricity things... but people must follow an professional electrician or other professional expert for other diferent things on your zone...ask ...takee a course on electric security on home... or other courses ...carpintery..plumber...paint...etc

security and safety on persons is the firat and the most important thing... others things can be changed or substituted..persons not....SECURITY AND SAFETY FIRST....

sweet dreams...happy dreams....good nights...

y ni un like...lol ..no love here for me Wilson....

muchos animos y no bajeis la guardia con el covid...

y pasamos a mute largo Wilson...fue un placer...

Paz y Amor...

Saludos desde Tenerife

 

[cobshopgrow]

Back in the day I vegged with hortilux blue MH. For the last couple years I've been using cmh. I hate cmh, they always contribute to stretchy lanky plants. If you look at the cmh spectrum (even the 4k) they have very little blue. Maybe I'm not using the right cmh system, but I'm done with cmh.

I've been doing some research trying to find information on how much blue is needed and how much is too much. I've heard it said by a couple sources that too much blue in veg will cause your plants to be stunted and even stressed, but they don't back that up with data. And their definition of too much it over 40%. Bugbee in one of his youtube videos mentioned something about 20% blue in veg helping to keep your plants from stretching, but did not say if that was optimum or if more than that would be detrimental.

I don't want to overthink the whole thing but I am having issues with 4k cri90 that has more blue than a typical 4k. However, you are right Rocket, I over did it on the wattage, and have since dialed the current back and raised the lights and the plants are now "praying" when before they were not. I'm taking Cobbs advice and looking at them right before lights out and they could use a little more. So, some dialing-in seems to be necessary with such lights.

Yet I'm needed to buy more veg lights so the question still remains for me how much blue is too much.

BTW- I also raised my heat and humidity and that had a visibly positive effect on the plants.

sounds you have a good overview over the usual veg lights, i am keen to hear to what you find.
@Kassiopeija she always have some good docs at the hand.
her find below.
you can see some salvia in regard to blue red ratios.
up to 25% looks fine to me.


this is from a study posted here a few days ago in the emerson thread.
0.88 is without extra 730nm all day, 0.7 with the highest percentage of FR, EOD-FR is selfexplaining.

i think we havent considered FR much in this thread.
90cri of course have more FR, the thrive too.
i just throw this in the round, maybe someone have more precise numbers at hand.

edit: link to the emerson thread

Emerson Effect + End of Day Effect + UV Effect supplement bars with Geekbeast 630watt

I've never seen a thread that shows any benefit to going for the emmerson effect. Does anyone have a link to a side by side grow featuring 730 nm lighting?

www.rollitup.org

 

[rkymtnman]

you can see some salvia in regard to blue red ratios.
up to 25% looks fine to me.

for my untrained eye, i think the 12 or 25 look the healthiest as far as foliage growth AND root growth combined?

i think we havent considered FR much in this thread.

and it looks like the ,7 and .73 look the "best" to me as well.

so assuming that, what light would give you the "easiest" combination of both of those factors: blue % and FR????
thoughts everybody??

 

[Kassiopeija]

i think the 12 or 25 look the healthiest as far as foliage growth AND root growth combined?

agreed, and the 6.25 could be interpreted to resemble HPS growth?

 

[Kassiopeija]

here's another one also incorporating green:

Green light: Is it important for plant growth?

Green light is considered the least efficient wavelength in the visible spectrum for photosynthesis, but it is still useful in photosynthesis and regulates plant architecture.

www.canr.msu.edu

I wonder if the addition of blue into a general spectrum should only be done as minimalistic as possible? The lm301-one shifts alot blue right into green, and that^^ is a "leafy greens".... there will be a growreport with these chips so it'll be interesting how excessive green grows cannabis in flower.

 

[rkymtnman]

here's another one also incorporating green:
View attachment 4789467

Green light: Is it important for plant growth?

Green light is considered the least efficient wavelength in the visible spectrum for photosynthesis, but it is still useful in photosynthesis and regulates plant architecture.

www.canr.msu.edu

I wonder if the addition of blue into a general spectrum should only be done as minimalistic as possible? The lm301-one shifts alot blue right into green, and that^^ is a "leafy greens".... there will be a growreport with these chips so it'll be interesting how excessive green grows cannabis in flower.

and the hyper red vs far red difference too?

 

[Kassiopeija]

and the hyper red vs far red difference too?

I believe FR is a powerful tool to induce stretch and increase interrnode length, so if you want to keep things short in veg I'd so, yes, just a little. Otherwise you need excessive amounts of blue to counterbalance, but does this investment pay off as the high-K light is commonly listed having less quanta of photons per J or radiant flux. The red light is just so efficient to be produced as it holds less energy, but, still enough for photosynthesis.

From mid-flower on an more pronounced usage of FR could result in more total biomass, incl. stems, buds, and faster ripening (earlier harvest). But there have also been studies done which contradicted the benefits, but this light seems to cause several independant functions and its plenty in the sun, esp. relatively more in autumn in regards to the other colors. and blue less.

 

[Kassiopeija]

^^ chinese Cabbage ^^
CK = white light

What we need is something like this for hemp, incl. FR 730nm and NUV 400nm, and then the relative strength sorted out until optimized. But this is just 1 leaf. What about the sub-canopy light/spectrum and its strength?

 

[rkymtnman]

So I know chinese blurples are crap but...

viparspectra V series has these diodes:
730, 660, 630, 615, 595, 580, 475, 460, 445, 440.
also 3000K and 7500K.

sounds like this ticks a lot of boxes as far as the hyper red , far red and blue aspects.

and it's only $55 delivered to cover my 2x2 tent.

thoughts?