Maxx PPFD ?

[MeGaKiLlErMaN]

Not sure where people are finding this PPFD above 2000... but this is the summer sun

 

[bxkid]

My Lemon Garlic OG, 2 months under 241w of COB:

View attachment 3836502 View attachment 3836504 View attachment 3836506

Would you happen to have a journal on that grow to follow?...that would be cool.

 

[Olive Drab Green]

Would you happen to have a journal on that grow to follow?...that would be cool.

I do. It's my blog.

 

[bxkid]

I do. It's my blog.

Perfect...thanks

 

[CobKits]

Not sure where people are finding this PPFD above 2000... but this is the summer sun

my licor reads 1800-2000 in full summer sun

 

[MeGaKiLlErMaN]

my licor reads 1800-2000 in full summer sun

Which would match this chart... but its not some 2500.

 

[CobKits]

and when i say sun i mean 5000 ft clear sky CA desert, most people never see that sort of intensity where they live

 

[ttystikk]

in a 4'x4'x6.5' space you can do one, horizontal scrog. But you could easily do two, 4x4 scrogs vertically. Isn't that more efficient use of space?

Actually, you could do FOUR, one on each wall.

 

[Budget Buds]

My Lemon Garlic OG, 2 months under 241w of COB:

View attachment 3836502 View attachment 3836504 View attachment 3836506

That is beautiful , I have a pineapple bush too, There fucking awesome

 

[ttystikk]

and when i say sun i mean 5000 ft clear sky CA desert, most people never see that sort of intensity where they live

In Colorado we do, every summer.

 

[CobKits]

yeah so you know what im talking about. i really dont go outside between 10 and 2

 

[Olive Drab Green]

That is beautiful , I have a pineapple bush too, There fucking awesome

Thanks, bro. And that's cool.

 

[BobCajun]

Not sure where people are finding this PPFD above 2000... but this is the summer sun

I just got it from the pdf I linked. I don't know how accurate it is. So let's just say around 2000 then. Maybe they were on a mountain, who knows. Here's a graph from a pdf that I had saved. Don't have a link but the title is "Light dependence of photosynthesis and water vapor exchange characteristics in different high 9-THC yielding varieties of Cannabis sativa L."

 

[rhygin77]

Not sure where people are finding this PPFD above 2000... but this is the summer sun

I shared this site one time before, but it's really interesting. It's what Apogee suggests you use to calibrate your PAR meter (they created the site), so I presume it's very accurate (with the caveats about weather). They even show the effect of different factors like RH.

With all that said, yes, it's very possible to get PAR above 2000 for the middle of the summer (although ~2200 is about the highest I'm finding just playing around with it).

http://clearskycalculator.com/quantumsensor.htm

 

[Budget Buds]

Alright people , another question, I ran this by @CobKits And he told me I needed the ler number which me being led illiterate , I dont know where or how to find it. I'm trying to find the efficiency of my lights. Here is the info I have on it. Vero 29 7th gen data sheethttp://www.bridgelux.com/sites/default/files/resource_media/DS93%20Vero%2029%20Array%20Data%20Sheet%20Rev%20A%2020160622.pdf Here is the info for the hlg 240 1050 driverhttp://www.bridgelux.com/sites/default/files/resource_media/DS93%20Vero%2029%20Array%20Data%20Sheet%20Rev%20A%2020160622.pdf
The vero's are 52v 3000k . Can you guys help a brotha out with this ?

 

[abaloneandbuds]

Not sure where people are finding this PPFD above 2000... but this is the summer sun

What latitude? day of the year? weather? Was the moon out? Humidity? Elevation?
I could go on, but hopefully my point is made.

 

[MeGaKiLlErMaN]

I just got it from the pdf I linked. I don't know how accurate it is. So let's just say around 2000 then. Maybe they were on a mountain, who knows. Here's a graph from a pdf that I had saved. Don't have a link but the title is "Light dependence of photosynthesis and water vapor exchange characteristics in different high 9-THC yielding varieties of Cannabis sativa L."

I have something simaler in my signature

 

[MeGaKiLlErMaN]

What latitude? day of the year? weather? Was the moon out? Humidity? Elevation?
I could go on, but hopefully my point is made.

Hey like I said I'll take my own measurement when it's summer again lol. Still getting 850ppfd in Michigan now.

 

[pop22]

yeah but I like it down here at 200'abs...lol!

and when i say sun i mean 5000 ft clear sky CA desert, most people never see that sort of intensity where they live