Maxx PPFD ?

Ganjineer

Ganjineer

Member
Shugglet said:
OK so out of morbid curiosity, let's say I have 6 vero 29B @ roughly 1.4a or about 360w. in a fridge that is a little less than 4sqft


How do you get from parw/sqft to ppfd?
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Shameless plug. If you're interested on modeling your light you can check out my thread here... https://www.rollitup.org/t/photosynthetic-spectral-quality-calculator-psqc.922782/

It will give you an estimate of PPF per cob and then you can multiply that by number of cobs and divide by your m^2 to get PPFD. I'll probably add room dimension inputs in v1.2
 
The Dawg

The Dawg

Well-Known Member
ttystikk said:
Hmmmm. All this tells me is that you're a coward who's afraid to try truly anything new, but happy to talk shit on those who do.

NOTHING you do breaks new ground, everything you've ever done is derivative of the work of others, so accusing me of doing the same- even while giving credit where it's due- is silly. Even backward.

Stay in your tent, then.

BTW, the saying goes, "legend in your own mind". Do try to plagiarize correctly.
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Well If Telling The Truth Is Talking Shit In Your Book Then I Talk A Lot Of Shit.

Your Not Very Witty Are You. No I Said Legion And I Meant Legion Which Is A Military Term To Mean 2000-6000 Troops. Gawd I Thought You Were An English Professor Or Wait A Design Engineer Or Was it A Master Electrician. Oh Hell Now I Remember You An Egomaniac With An Inferiority Complex

Hey You Left Out That I Have A Small Penis :-( Peace And Talk To The Hand Bitch I'm Done Interacting With A Middle Age Under Achieving Fool :peace:
 
BobCajun

BobCajun

Well-Known Member
The Dawg said:
Well If Telling The Truth Is Talking Shit In Your Book Then I Talk A Lot Of Shit.

Your Not Very Witty Are You. No I Said Legion And I Meant Legion Which Is A Military Term To Mean 2000-6000 Troops. Gawd I Thought You Were An English Professor Or Wait A Design Engineer Or Was it A Master Electrician. Oh Hell Now I Remember You An Egomaniac With An Inferiority Complex

Hey You Left Out That I Have A Small Penis :-( Peace And Talk To The Hand Bitch I'm Done Interacting With A Middle Age Under Achieving Fool :peace:
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Hate to butt in but isn't it a little inconvenient to capitalize every word? And what exactly is the point?

But on another PPFD related subject, I know that lower CCT LEDs put out more lumens than higher ones but has anyone compared the PPFD? Because lumens vary with the spectrum even if it's the same energy output. I suspect that the lower CCTs would also be higher in PPFD, but I wonder how much. Don't have a PAR meter myself.
 
DrBlaze

DrBlaze

Well-Known Member
The Dawg said:
I Talk A Lot Of Shit
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jUST aBOUT tHE oNLY tHING i'VE eVER rEAD bY yOU tHAT i cAN aGREE wITH.

yOU nEVER cOME iNTO oTHER pEOPLE'S tHREADS tO hELP tHEM, jUST tO sTIR uP sHIT wITH oTHER mEMBERS. wHY dO yOU eVEN bOTHER? nOTICE hOW nOBODY lIKES yOUR bITCHY pOSTS? wHY dO yOU tHINK tHAT iS?

aND wHY dO yOU eND yOUR pOSTS wITH a pEACE sIGN? yOU aRE oNE oF tHE lEAST pEACEFUL pEOPLE oN tHIS sITE?

lOOK hOW i wRITE wITH mY cAPITALS aND lOWER cASE lETTERS! i'M oBVIOUSLY wAY cOOLER tHAN yOU!!!1111
 
Evil-Mobo

Evil-Mobo

Well-Known Member
BobCajun said:
Hate to butt in but isn't it a little inconvenient to capitalize every word? And what exactly is the point?

But on another PPFD related subject, I know that lower CCT LEDs put out more lumens than higher ones but has anyone compared the PPFD? Because lumens vary with the spectrum even if it's the same energy output. I suspect that the lower CCTs would also be higher in PPFD, but I wonder how much. Don't have a PAR meter myself.
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@Rahz has a thread where he's tested different CRI etc, I'm sure you can find it searching it's not that old.
 
BobCajun

BobCajun

Well-Known Member
I found what I wanted in another thread. Someone posted this from a Citizen pdf. As you can see, the 5000k has a slight advantage over the warmer whites in PAR per watt, though actually it's only about 5% at most. Still, since it is the most efficient at delivering PAR and is also closest to the CCT of sunlight at noon, might as well use that one. The sun is about 5500k from what I've read. The higher CCTs are said to give frostier buds anyway and shorter plants. Doesn't seem to be a downside really.

I don't think it actually matters much what the exact spectrum is, just the total PAR. For instance, I've read that plant growth increases with more blue up to 50%, and none of the white COBs have over 50% blue. I think you only need enough red to activate the phytochrome based flowering system. In fact, I've seen experiments where you can use pure blue as long as you also run some pure red for a few minutes after the blue is turned off. With pure blue the flowering is prevented, at least in the plants they were using, presumably it's similar with weed. I've even seen experiments where they grew vegetative plants with pure red, blue and green light and blue always comes out ahead in dry weight. Surprisingly, with pure green light they only grew a little less than blue or red, but it was always the least of the three.

 
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The Dawg

The Dawg

Well-Known Member
DrBlaze said:
jUST aBOUT tHE oNLY tHING i'VE eVER rEAD bY yOU tHAT i cAN aGREE wITH.

yOU nEVER cOME iNTO oTHER pEOPLE'S tHREADS tO hELP tHEM, jUST tO sTIR uP sHIT wITH oTHER mEMBERS. wHY dO yOU eVEN bOTHER? nOTICE hOW nOBODY lIKES yOUR bITCHY pOSTS? wHY dO yOU tHINK tHAT iS?

aND wHY dO yOU eND yOUR pOSTS wITH a pEACE sIGN? yOU aRE oNE oF tHE lEAST pEACEFUL pEOPLE oN tHIS sITE?

lOOK hOW i wRITE wITH mY cAPITALS aND lOWER cASE lETTERS! i'M oBVIOUSLY wAY cOOLER tHAN yOU!!!1111
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BobCajun

BobCajun

Well-Known Member
OMG, you two still at it? The Godfather reminds me of Trump btw. Trump WISHES he was the Godfather. Godfather sounds like somebody jabbed him in the throat or something. At the end, after the guy walked out the door I thought Godfather was gonna say "kill him".
 
ttystikk

ttystikk

Well-Known Member
The Dawg said:
Well If Telling The Truth Is Talking Shit In Your Book Then I Talk A Lot Of Shit.

Your Not Very Witty Are You. No I Said Legion And I Meant Legion Which Is A Military Term To Mean 2000-6000 Troops. Gawd I Thought You Were An English Professor Or Wait A Design Engineer Or Was it A Master Electrician. Oh Hell Now I Remember You An Egomaniac With An Inferiority Complex

Hey You Left Out That I Have A Small Penis :-( Peace And Talk To The Hand Bitch I'm Done Interacting With A Middle Age Under Achieving Fool :peace:
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You're accusing ME of padding my own legend, Mr Capitalize Every Word?

Got another music clip to convince us you're cool?

So far you haven't said anything except that you're jealous.

Have a nice day.
 
ttystikk

ttystikk

Well-Known Member
DrBlaze said:
jUST aBOUT tHE oNLY tHING i'VE eVER rEAD bY yOU tHAT i cAN aGREE wITH.

yOU nEVER cOME iNTO oTHER pEOPLE'S tHREADS tO hELP tHEM, jUST tO sTIR uP sHIT wITH oTHER mEMBERS. wHY dO yOU eVEN bOTHER? nOTICE hOW nOBODY lIKES yOUR bITCHY pOSTS? wHY dO yOU tHINK tHAT iS?

aND wHY dO yOU eND yOUR pOSTS wITH a pEACE sIGN? yOU aRE oNE oF tHE lEAST pEACEFUL pEOPLE oN tHIS sITE?

lOOK hOW i wRITE wITH mY cAPITALS aND lOWER cASE lETTERS! i'M oBVIOUSLY wAY cOOLER tHAN yOU!!!1111
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Yet ANOTHER winning post!
 
Budies 101

Budies 101

Well-Known Member
ttystikk said:
I conceived, developed, designed, engineered, had built and am continuing to test my very own large scale COB LED light design.

Even if I'm ultimately not making the best light ever, that's not a half bad achievement for just some guy on a forum.
View attachment 3833379

And, that was last year.
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One of the best vertical grows I have seen. People need to start looking at vertical space in grow rooms.
 
Yodaweed

Yodaweed

Well-Known Member
David Abrahamson said:
One of the best vertical grows I have seen. People need to start looking at vertical space in grow rooms.
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Why would you ever bother growing with LEDs vertically, dumbest shit ever, they are not Omni directional there is literally no advantage to doing that. I see why a bulb would be an awesome vert grow but wtf an LED that's retarded.
 
B

Budget Buds

Well-Known Member
Yodaweed said:
Why would you ever bother growing with LEDs vertically, dumbest shit ever, they are not Omni directional there is literally no advantage to doing that. I see why a bulb would be an awesome vert grow but wtf an LED that's retarded.
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Maybe he is space constrained horizontally ?
 
Yodaweed

Yodaweed

Well-Known Member
Budget Buds said:
Maybe he is space constrained horizontally ?
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Ok that's true but 9 out of 10 times it's the opposite, too little height too much width. You will not up yield by growing vertically with a light that has a 180 degree directional radius. You will however gain yield by growing vertically with an omnidirectional light because it removes reflector losses and uses 100% of the energy.
 
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