looking for Meijiu A8 650W reviews

bk78

Well-Known Member
interesting how the china lights continue to dumb down, 660nm, picture looks like Osram but they dont state that, the high efficiency is white/red lights but is driven by red, but best performance is only best deep red, seems like they feel if they dont say they can drop in any old deep red, so many panels out there with super low output deep reds, making ridiculous claims...:wall:
 

Sleez

Well-Known Member
interesting how the china lights continue to dumb down, 660nm, picture looks like Osram but they dont state that, the high efficiency is white/red lights but is driven by red, but best performance is only best deep red, seems like they feel if they dont say they can drop in any old deep red, so many panels out there with super low output deep reds, making ridiculous claims...:wall:
56DD03A9-8771-447C-A649-5F59C69FFACC.jpeg
 

salmonetin

Well-Known Member
Mine have osram 660, and they stated that on the site.
...i imagine they using Osram Oslon...80?..120?...150?...what model used... any bin?...
...seems to me maybe there are IES Files or other photometric files from Osram....

any IES files + SPD for these lamps?.... (i hear some diferent versions...white +red 660---white +red 660 +fr730 +uv?(osram uv?..))

maybe some day...we have the IES TM25 Files for all grow lamps...or other photometric file diferent than an graphic SPD...
SPD on text helps a lot... IES Files to play with Dialux free soft...
then...graphic SPD ploted on text...+ IES Files....

with the SPD on text...we can use other curious tools...like...

https://www.osram.us/cb/tools-and-resources/applications/led-colorcalculator/index.jsp








I’ve never understood a single post you’ve ever made since I joined, and probably never will

so my answer is yes. ....mmmm....ok...admito mi mal ingles... algunos ni lo intentan entender...o ponerse en mis zapatos...

what osram oslon 660 are used?... do you know the bin used?... do you know if are a 80º...120º....150º beam angled?

same for other red or violet or uv used... if there are osram...there are some photometric info too... seems to me

maybe better?...sorry my bad english... nothing new for you...

...im dont pretend go against the lamps or your lights...

you dont care tech things...just using...ok bro...no problemo...

...im only trying know better this lamps... normally i try to know all of my lamps...or future lamps...know your poison helps...at least for my pov...

thanks for the... i add more offtopic tipical mine....

curious for side ligth and undercanopy light too...curious cob with onboard ceramic heatsink...

...maybe works with other cobs... ...curious heatsink... plastic its not my preference...but there are curious models on grow lamps.... and yeah not the best leds... and maybe not the best drivers... but its too inspirative for my future diy...



undercanopy....intracanopy... sidecanopy...music for my pov...


...some curious tools eehh Wilson...jejeje...

gracias por tu like añado info offtopic tipica mia...

...para temas VPD prefiero los sensirion SHT4x...me parecio ver algun dev board con el SHT41 a bordo...
y para CO2 los SCD41... en espectrometros los V1 ...W1...el dev board... y el del movil de NanoLambda...

y creo nos saldria mas barato y con mejores sensores...pero es diy nivel 2... muchos lo querran de comprar y usar como estos pulse...o similar... no problemo...

su vpd calculator de excel me sirve para construirme una hoja calculadora vpd mia tuneada...a ver si logro hacer un mix de 2 calculadoras de vpd diferentes... cogere cosas de una y de otra.... y sera mas completa y precisa para ciertas cosillas...no llevo prisa... y me puede servir con otras tools en excel... un mix de tools en un mismo libro...con tool de sds de supra de kanna...de...unos cuantos mas ...alguna mia habra tambien... jejejjee...si tuviera mejor pc ...seria mucho mejor...y divertido...pero ya me vendran mejores dias...



How to Set the VPD Leaf Temperature Offset
This short guide will teach you the correct way to measure, calculate, and set the VPD leaf temperature offset.
Chris Tosi avatar

Written by Chris Tosi
Updated over a week ago

The correct VPD helps plants grow their best. To accurately track the VPD that plants feel, you need to know the temperature at the leaf.
Pulse can take that "leaf VPD" into account when displaying VPD in the app to guide you to better results.

What you'll need to Get Started
  1. IR Thermometer Gun
  2. Notepad
  3. Pulse App
  4. Calculator Tool
Calculating the VPD Leaf Temperature Offset
  1. Make sure Lights are ON and have been for a good amount of time ( > 1 hr)
  2. Get your IR Thermometer Gun
  3. Collect 4-6 Temperature Readings of Leaves in the Canopy at various different spots: Top, Bottom, Middle, Sides, etc. Write these down.
  4. Collect 4-6 Temperature Readings of Non-Plant Material: Supports, Walls, Pots, Plastic, Wood, etc. Write these down.
  5. Get the Average of the Canopy Plant Temperatures.
  6. Get the Average of the Non-Plant Temperatures.
  7. Subtract Non-Plant Temperatures from Canopy Plant Temperatures: (T Canopy) - (T Other) = Leaf Temperature Offset
    Ex: Canopy Plant Average Temps 75, Other Average Temps 80
    75 - 80 = -5
    Ex: Canopy Plant Average Temps, 65, Other Average Temps 60
    65 - 60 = 5
  8. Enter the Leaf Temperature Offset into the App.
    1. Log in > go to the dashboard > tap / click on a device > tap / click on the gear icon in the top right > scroll down until you see a section called "VPD Leaf Temperature Offset"
    2. Enter the Offset you calculated in step 7, make sure to mind the negative sign if there is one.
    3. Tap / click the blue update button.
FAQ
How often should I do this?
  • Once a month is sufficient.......MMMMMM.....
Why don't you have a separate VPD leaf temperature offset for night?
  • VPD doesn't matter at Night since Plants Close their Stomata.
Where should I measure the leaves?
  • All across the canopy - left to right, top to bottom.
...algunos mediremos tambien la temperatura y humedad del suelo de la planta....capacitive soil moisture sensors...
...y la diferencia de temperatura y humedad del aire en exterior al aire en interior....
...y la altura con respecto al mar del cultivo....para corregir el VPD en funcion de la altitud a la que este el cultivo...



[URL unfurl="true"]https://www.youtube.com/watch?v=bCqJtEMFPiw[/URL]




gracias por el like y por el amor...este post ya esta a tope...pero pondre mas info por aqui y en otro post...https://www.rollitup.org/t/cannabis-daily-light-integral.921153/post-16185868

...el tema DLI esta curioso...un poco de alli por aqui...y un poco de aqui para alli... mezclas de info varias...





What are typical μmol/s.m² values for horticulture lighting?

What light level for what type of crop?
Plant
Min (μmol/s.m²)
Max (μmol/s.m²)
Typical (μmol/s.m²)
Tomato​
170​
350​
230​
Pepper​
120​
300​
180​
Cucumber​
120​
350​
230​
Cannabis Vegetative growth​
280​
550​
350​
Cannabis Flowering​
650​
1,000​
850​


DLI for Common Indoor Crops

PlantDLI
Shade Plants6 - 10
Peas9
Basil12
Broccoli15 - 35
Tomatoes20 - 30
Zucchini25
Peppers30 - 40
Cannabis30 - 45
...Good Nights...Happy Dreams....


Paz y Amor...en 2021 aun mucho mas...

Saludos desde Tenerife - Islas Canarias
 
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bk78

Well-Known Member
...i imagine they using Osram Oslon...80?..120?...150?...what model used... any bin?...
...seems to me maybe there are IES Files or other photometric files from Osram....

any IES files + SPD for these lamps?.... (i hear some diferent versions...white +red 660---white +red 660 +fr730 +uv?(osram uv?..))

maybe some day...we have the IES TM25 Files for all grow lamps...or other photometric file diferent than an graphic SPD...
SPD on text helps a lot... IES Files to play with Dialux free soft...
then...graphic SPD ploted on text...+ IES Files....
I’ve never understood a single post you’ve ever made since I joined, and probably never will

so my answer is yes.
 

bk78

Well-Known Member
...i imagine they using Osram Oslon...80?..120?...150?...what model used... any bin?...
...seems to me maybe there are IES Files or other photometric files from Osram....

any IES files + SPD for these lamps?.... (i hear some diferent versions...white +red 660---white +red 660 +fr730 +uv?(osram uv?..))

maybe some day...we have the IES TM25 Files for all grow lamps...or other photometric file diferent than an graphic SPD...
SPD on text helps a lot... IES Files to play with Dialux free soft...
then...graphic SPD ploted on text...+ IES Files....
I just grow weed buddy. Efficiency or binning of diodes doesn’t matter to me. My cheap lights grow just what I need them to grow.
 

bodhipop

Well-Known Member

zacuriah

Active Member

Bill Choi

Member
@salmonetin
Thank you for mentioning nanoLambda.
We have a tiny BLE(Bluetooth Low Energy) Spectroradiometer, 39 x26 x 16 mm & 28g, which still measures accurately SPD(W/m2), SPD, DLI, Lux..

nanoLambda was recently awarded the prestigious Prism Award 2021 from SPIE, for the innovative new product in Smart Sensing

Contact for any inquiry is info@nanolambda.net
Thanks
 

salmonetin

Well-Known Member
@salmonetin
Thank you for mentioning nanoLambda.
We have a tiny BLE(Bluetooth Low Energy) Spectroradiometer, 39 x26 x 16 mm & 28g, which still measures accurately SPD(W/m2), SPD, DLI, Lux..

nanoLambda was recently awarded the prestigious Prism Award 2021 from SPIE, for the innovative new product in Smart Sensing

Contact for any inquiry is info@nanolambda.net
Thanks
Thanks a lot...apreciate your words... im only an bit old (60) lol...and poor canary exelectrician...

Es todo un honor para mi que alguien como usted gaste algo de su tiempo para darse un salto aqui y darme las gracias... mil gracias a usted....no nos conocemos ni he hablado con ustedes o trabajo o tenemos relacion comercial alguna... y hoy me lleve una grata sorpresa con sus posts... mil gracias de nuevo....

...y Muchas Felicidades por el Premio....mucho amor para ustedes...

Paz y Amor....en 2021 aun mucho mas...

Saludos desde Tenerife - Islas Canarias
 
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getogrow

Well-Known Member
Won't allow me to pay by credit card because I haven't purchased anything from alibaba before .
I just had to pay 60 extra bucks for using a card. I had never ordered from them before either. That was the only thing that pissed me off going through them.
 
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