Current will ALWAYS be regulated by varying the output voltage

[PurpleBuz]

So an HLG-600H-42B Connected to 1 citi1212 undimmed would blow the cob from too much current? No I do not want to run single COB off of a 600 watt driver it is a hypothetical question from a member a few pages back on cobkits thread whom made it seem as though it is not possible to supply an led/cob with too much current from a MW CC driver.

per the data sheet at 42V the citizen 1212 will exceed its absolute maximum current of 2750 ma which is achieved at 39 volts.

so the HLG-600H-42B is the wrong driver to run the citizen 1212 in parallel.

Please do not listen to anything GrowLightResearch says... obviously a true idiot.

 

[GrowLightResearch]

it seem as though it is not possible to supply an led/cob with too much current from a MW CC driver.

It's been know to happen.

The problem here is these guys were told the facts of life by a misinformed vendor they trusted.
Sad. There is no stork
The check is NOT in the mail.

 

[GrowLightResearch]

per the data sheet at 42V the citizen 1212 will exceed its absolute maximum current of 2750 ma which is achieved at 39 volts.

Yes. That is why there is a current limit via the DIM wires. That is why I assumed the open wires would burn the CoB. Glad to see you are almost learning though.
Now look at what you cannot do when using the 36v HLG.

Please do not listen to anything GrowLightResearch says... obviously a true idiot.

Please? Nice to know you care.

 

[PurpleBuz]

Yes. That is why there is a current limit via the DIM wires. That is why I assumed the open wires would burn the CoB. Glad to see you are almost learning though. Now look at what you cannot do when using the 36v HLG.

that makes no friggin sense. The 36V matches the desired current range. A higher voltage driver like the 42V driver the current gets limited via dimming and the final power output will drop.

 

[GrowLightResearch]

that makes no friggin sense. The 36V matches the desired current range. A higher voltage driver like the 42V driver the current gets limited via dimming and the final power output will drop.

Does the CoB's full range of min to max Vf fit in the 36v HLG range?

Answer: NO it does not!

Does it fit in the 42v range?
Yes it does.

The 36V matches the desired current range.

Love your mystical powers to know what the desired current range is for everyone.
Sadly I do not possess those powers.
I have to choose the option that works for everyone.
Good luck with that though.


This burdens me with having to break it to them they need to use a resistor to get their desired current. Oh wait, isn't that the right thing? Hmm...

 

[GrowLightResearch]

Non Other Than NoFucksToGive

Give it up for NoFucksToGive

Here comes the Rolli Poly Man and he's singing songs of love
Rolli poly, Rolli poly, Rolli poly, poly
Hurdy gurdy, hurdy gurdy, hurdy gurdy, gurdy
Rolli Tup

 

[The Dawg]

Give it up for NoFucksToGive

Here comes the Rolli Poly Man and he's singing songs of love
Rolli poly, Rolli poly, Rolli poly, poly
Hurdy gurdy, hurdy gurdy, hurdy gurdy, gurdy
Rolli Tup

Dude You Need To Layoff The Crack Pipe

 

[GrowLightResearch]

Dude You Need To Layoff The Crack Pipe

Love you too.

I see the show downs, slow downs, lost and found, turn arounds
The boys in the military shirts
I keep my eyes on the prize, on the long fallen skies
And I don't let my friends get hurt
All you back room schemers, small trip dreamers
Better find something new to say
Cause you're the same old story
It's the same old crime
And you got some heavy dues to pay
Though I'm wild and I'm bad
and sometimes just plain mad
Soul like a Lucifer
Black and cold like a piece of lead
Misguided angel'll love me 'til I'm dead

 

[1212ham]

Just curious as to which driver you used?

250W variable voltage power supply.

 

[1212ham]

So an HLG-600H-42B Connected to 1 citi1212 undimmed would blow the cob from too much current? No I do not want to run single COB off of a 600 watt driver it is a hypothetical question from a member a few pages back on cobkits thread whom made it seem as though it is not possible to supply an led/cob with too much current from a MW CC driver.

HLG-600H-42B is not a cc driver.

 

[nxsov180db]

HLG-600H-42B is not a cc driver.

https://www.trcelectronics.com/ecomm/pdf/hlg600h.pdf
Look at the first list of features.

 

[1212ham]

It shows 12-54 VOLT drivers.
I'm familiar with the difference between the HLG-xxxH and HLG-xxxH-C drivers.

 

[nxsov180db]

It shows 12-54 VOLT drivers.
I'm familiar with the difference between the HLG-xxxH and HLG-xxxH-C drivers.

Yes of course it does. And I'm sure you do. So it's not a CC driver even though it's listed in the features?

 

[wietefras]

This is the part you do not understand.

I can then calculate the PPFD per watt.

But ... you didn't do that.

Besides even if you had done that, it would still be incomparable. A COB running on 50W is less efficient than at 35W. So the "photon per watt" would still be incomparable. Your whole test was flawed whichever way you try to spin it. Basically becaus eyou have no clue what you are doing, so you do everything wrong from the basics.

I then use PPFD/watt and Inverse Square Law to make them "comparable" at any height. I chose to compare them at 1 meter.

And that is not how it works either. Besides you actually said you were supposed to standardize PPFD measurements (or Mole measurements as you call them) to 1 meter. So you really thought that was what you were supposed to do.

Remember you say ISL does not matter? Stupid as stupid gets:

Do you remember that even your measurements and simulations showed that that is indeed the case for distance between a fixture and plants? I'll agree you truly are the dimmest bulb around here.

 

[wietefras]

It's been know to happen.

The problem here is these guys were told the facts of life by a misinformed vendor they trusted.
Sad. There is no stork
The check is NOT in the mail.

View attachment 4073246

That's a picture of your own failed COB test. You are going to try and blame this on someone else now? Seriously dude.

 

[PurpleBuz]

Yes of course it does. And I'm sure you do. So it's not a CC driver even though it's listed in the features?

its both a CV and a CC driver.

 

[GrowLightResearch]

But ... you didn't do that.

You never did understand what I did. It was over your head. The OP understood and thanked me for going out buying the CoB he was asking about and giving him the info he wanted.

Mole measurements

Moles is what is being measured. As in micro-mole. If you do not understand when I say moles or µmole

Do you remember that even your measurements and simulations showed that that is indeed the case for distance between a fixture and plants? I'll agree you truly are the dimmest bulb around here.

That was true for a 4' strip with multiple source of light, not a single CoB. Look at that as if the sensor was 2 ft' away from a single LED and you varied the height, the Inverse Square Law would be skewed by the horizontal distance and the the angle's cosine.

You are not enlightening this "dimmest bulb". Never did. You DO NOT GET IT. What about your stupid ass statement the PPFD = PPF / Area???? That statement shows you do not understand. There is a difference between knowing how to answer a physics question question on an exam and understanding why that is the correct answer. Anyone can plug the numbers into a memorized equation to get the correct answer. I took the time to understand and you who obviously does not is annoying AF. The only reason I still respond to you is because there are others out there that believe what you say is true.

What about that link I send you with the errors in converting PPF to PPFD. I say it has horrific errors. You once used a similar link to Apogee with conversion factors.

Also since you spouted your dumbass theory that reflectance wipes ISL I tested a single CoB both in a dark open environment and in a Gorilla tent. The measurements were nearly identical at each height measured height and followed ISL at each height.


When referring to a irradiance or PPFD measurement that's your problem with that stick you got up your ass.

Dazzle me with your brilliance. Regarding the link http://docs.agi32.com/AGi32/Content/adding_calculation_points/PPFD_Concepts.htm

What is wrong with what is on this page?
If it is correct show me how to convert from intensity to irradiance. To keep it very simple let's just say the radiometric power at each integer Thz below 540 Thz is 0.5w, above .075w.

You claim to have written an app that can calculate the reflectance of the mylar sheeting used on grow tents.
Can you explain how you did that with respect to the angle of the reflected ray? Specifically how the angle influences the electromagnetic power of the reflected ray vs. the incident ray. How does refraction come into play? Scatter? I never believed you wrote such an app. The gray blue blobs it created were incomprehensible. You never answered one question I asked you about that fictional app.

 

[GrowLightResearch]

That's a picture of your own failed COB test..

This is an example of how your mind is like a sieve. As previously explained, the CoB was damaged when using it for a thermal experiment where it needed to be pushed hard. Even though it was damaged it still works fine as a heat source. For my purposes it is not damaged. I do not use CoBs for any type of lighting. So it was not a failed CoB test. As you probably do not recall that even though some of the dies were damaged it still put out the same irradiance as an undamaged CoB with the same part number.

BTW it was an experiment that showed that attaching a QB board to a sheet of aluminum is not effective for free convection. Or am I wrong there too? Not that I'd expect you to understand that either.

You are going to try and blame this on someone else now? Seriously dude.

WHAT??? Blame what on who? Do you have a reading comprehension issue? It was mostly pictures. How do you fuck that up? Seriously, it often appears you have notable problems with reading comprehension.

The point was I used an HLG to damage the LEDs.
I suppose you then agree the 36v HLG is the proper driver for a Citi 1212 CoB?

 

[GrowLightResearch]

Come on, you can say it..... I'll help you. Just repeat after me : "I..... was.... wrong.... and..... you..... guys..... were ..... right." There. Now, was that really so hard?

My point was I cannot fathom why someone would choose a 36v driver over the 42v diver for that particular CoB.
What is the purpose? Is it to use the Vf to regulate the current? How can that be done? In this case it's E = I x R not I = E÷R
Do understand that while LEDs are semiconductors they are not manufactured with precision lithography like transistor logic semiconductors (TTL) or analog devices like op-amps etc. LEDs manufactured on the same wafer can have significant differences in Vf. The are getting much better with Vf consistency with all the R&D going into lowering the Vf of GaInN LEDs. Ever notice why the Gen 2 EB series strips have an improved lm/W? When you have 112 LEDs being powered, a small decrease in Vf makes for a significant improvement.

Point is, Vf should not be used to regulate driver current current. And the driver's max voltage should not be used either. The min and max Vf should BOTH fit into the driver's constant current range.

I have no problem saying I am wrong when I am wrong. I have apologized for being wrong on this site a few times. I said it to @alesh regarding the math.xls.

I was wrong about you, please forgive me. You understand optical measurement very well. I am impressed. Not too many understand it as well as you, especially on this site. I always viewed the SPD units to be W/m². I have not thought it through all the way but I guess it does not matter if you use radiant watts because its normalized numbers. Cannot think of any reason that would not work. Thanks for being patient with me, you are a gentleman and a scholar.

And @Randomblame

I was wrong, please forgive me. You are correct on both counts. I don't think they all use the schottly ESD diode, but it is common.

Maybe if you and your dip shit buddy @wietefras would back up why you say I'm wrong I could then help you pin point what you do not understand and correct errors of your ways. I does no good to just say I am wrong. You need to explain WHY I am wrong.

 

[psychedelicdaddi]

My point was I cannot fathom why someone would choose a 36v driver over the 42v diver for that particular CoB.
What is the purpose? Is it to use the Vf to regulate the current? How can that be done? In this case it's E = I x R not I = E÷R
Do understand that while LEDs are semiconductors they are not manufactured with precision lithography like transistor logic semiconductors (TTL) or analog devices like op-amps etc. LEDs manufactured on the same wafer can have significant differences in Vf. The are getting much better with Vf consistency with all the R&D going into lowering the Vf of GaInN LEDs. Ever notice why the Gen 2 EB series strips have an improved lm/W? When you have 112 LEDs being powered, a small decrease in Vf makes for a significant improvement.

Point is, Vf should not be used to regulate driver current current. And the driver's max voltage should not be used either. The min and max Vf should BOTH fit into the driver's constant current range.

I have no problem saying I am wrong when I am wrong. I have apologized for being wrong on this site a few times. I said it to @alesh regarding the math.xls.


And @Randomblame



Maybe if you and your dip shit buddy @wietefras would back up why you say I'm wrong I could then help you pin point what you do not understand and correct errors of your ways. I does no good to just say I am wrong. You need to explain WHY I am wrong.

those two equations are the same exact thing you moron