COB Spectral Quality Thread

[MeGaKiLlErMaN]

If you have a request post the spectral waves and Ill crunch the numbers. So far Ive only ran the CXB 3590 3000K 90 CRI and the Luminous Generation 3 CXM-22 3000K 90 CRI as its been shown that 90 CRI produces good results (Thanks @Rahz ) I started here to see which of these would be the better buy for myself. Ill open it up to other cobs as well. This is the most accurate for getting efficiency and a spectral read out for the cob itself.

These results were obtained through using the 85C for both, I would hope that 20W wouldn't be at 85C but hey its a worst case scenario.

The calculator Im using was provided by @Ganjineer and its called the Photosynthetic Spectral Quality Calculator. quite a mouthful.

If you have questions Ill more than likely be making a video on how to use this in the future as its a bit complicated for those that are not computer savy.

If you have a specific COB you want checked out to see a more accurate representation than the Cob calculator (mainly because it doesnt have the newer cobs) ill need the spectral curve to get the results, as well as the cobs name/cri/voltage.

With the advent of Photoshop I can continue to follow a curve outside of the given information, now I would call that speculative as its not exact information but its an educated guess. so if you wanted to see what a cxb3590 3500K 36V would give you at 500mA PAR/W efficiency PPF you get the idea.

Let me know what requests you have and Ill do my best.

Heres what I have for the two cobs above at 20W ish.

 

[KonopCh]

Vero V22 C (gen7) at 1050mA? 14 bucks for piece.
1212 gen 6 at the same mA?

 

[MeGaKiLlErMaN]

Vero V22 C (gen7) at 1050mA? 14 bucks for piece.
1212 gen 6 at the same mA?

What cri, color temp? Link the pdf or spectral graph

 

[Shugglet]

Is there any practical application for this, or mainly for sheer nerdiness?​

 

[coreywebster]

@CobKits do you have the data sheet for the clu048 1212 3500k gen 6 so @MeGaKiLlErMaN can run this fancy calc?

 

[DankaDank]

What cri, color temp? Link the pdf or spectral graph

Some what related.
Does any one have a SPD for a gen7 vero 3500k 90CRI ?
And if not.
Does any one have a spectrometer so we can get an SPD for a gen7 vero 3500k 90CRI ?

 

[MeGaKiLlErMaN]

Is there any practical application for this, or mainly for sheer nerdiness?​

Real world efficiency and PPF/W shows why lm/W isn't a good referance. You can find the best option for you for price point... To me that's important as those is expensive

 

[Shugglet]

Real world efficiency and PPF/W shows why lm/W isn't a good referance. You can find the best option for you for price point... To me that's important as those is expensive

What Im getting at is all of this theory crafting merely adds confusion to everything.

Case in point, real world efficiency should not be calculated in a program, because then its not real world efficiency...

Also, would the data coming out of this calculator reflect the information in this thread https://www.rollitup.org/t/cri-test-and-mcree-weighted-results.919923/page-12#post-13298256

My overall point is we need fewer threads like this and more like Rahz's with actual real world data because theory crafting is pointless unless you have data to backup those theories.

 

[MeGaKiLlErMaN]

What Im getting at is all of this theory crafting merely adds confusion to everything.

Case in point, real world efficiency should not be calculated in a program, because then its not real world efficiency...

Also, would the data coming out of this calculator reflect the information in this thread https://www.rollitup.org/t/cri-test-and-mcree-weighted-results.919923/page-12#post-13298256

My overall point is we need fewer threads like this and more like Rahz's with actual real world data because theory crafting is pointless unless you have data to backup those theories.

This is real world efficiency and PPF/W kinda an important item to understand. But if you dont want to know how efficient a given diode is then this isnt the thread for you. I agree more real world tests would be nice, but at least I can get accurate information from current and future LED types.

This isnt as much theory as it is getting an accurate amount of usable light from a given LED. Because LER and QER are kinda important numbers if youre buying 7K in Cob based lights.

The reason for the I made this is based off of that thread, I can calculate each one and since we know which one did win we can find out why... If people wanted that is.

 

[MeGaKiLlErMaN]

Some what related.
Does any one have a SPD for a gen7 vero 3500k 90CRI ?
And if not.
Does any one have a spectrometer so we can get an SPD for a gen7 vero 3500k 90CRI ?

What version? C,D, B? at what drive current?

 

[DankaDank]

V-22C at 500ma, but those factors would have almost no affect on spectrum.

 

[Shugglet]

This is real world efficiency and PPF/W kinda an important item to understand. But if you dont want to know how efficient a given diode is then this isnt the thread for you. I agree more real world tests would be nice, but at least I can get accurate information from current and future LED types.

This isnt as much theory as it is getting an accurate amount of usable light from a given LED. Because LER and QER are kinda important numbers if youre buying 7K in Cob based lights.

The reason for the I made this is based off of that thread, I can calculate each one and since we know which one did win we can find out why... If people wanted that is.

Real world efficiency isnt what youre getting though. You are "simulating" everything...

But thats more of a semantics point that is rather pointless at the moment. Im curious for you to take the data from Rahz's thread and see if the simulations youre doing at all reflect the real world results.

I would also be curious to see how close a simple conversion factor (~69 - 70) compares to this simulator.

 

[Nameless']

Since I'm about to buy CLU048-1212 Gen5, I'd be interested to get the data for 90CRI 3000K and 4000K at 1050 and 1400mA since it's not in the calculator

http://ce.citizen.co.jp/lighting_led/dl_data/datasheet/en/COB_5/CLU048-1212C4_P3382_1115.pdf

 

[MeGaKiLlErMaN]

Real world efficiency isnt what youre getting though. You are "simulating" everything...

But thats more of a semantics point that is rather pointless at the moment. Im curious for you to take the data from Rahz's thread and see if the simulations youre doing at all reflect the real world results.

I would also be curious to see how close a simple conversion factor (~69 - 70) compares to this simulator.

They will because it will show either if the spectrum or efficiency were important or if it was just the fact that it had higher red values. To me If I ran a 90CRI cob and it was 48% efficient but it produced more g/W than a 80CRI at 60% efficient that would say alot. So the goal would be to find the better spectrum as opposed to the most efficient COB. I thought that was a given.

 

[Johnnycannaseed1]

@MeGaKiLlErMaN can you crunch the numbers on Citi 97CRI Gen 6 3000k and 4000k driven @ 36 v and 37v

http://ce.citizen.co.jp/lighting_led/dl_data/datasheet/en/COB_6/CLU048-1212C4_P3814_1116_170220.pdf


And can you crunch the numbers on Citi 97CRI Gen5 3000k and 4000k driven @ 36 v and 37v

http://ce.citizen.co.jp/lighting_led/dl_data/datasheet/en/COB_5/CLU048-1212C4_P3559_0216.pdf

Cheers

 

[Johnnycannaseed1]

Real world efficiency isnt what youre getting though. You are "simulating" everything...

But thats more of a semantics point that is rather pointless at the moment. Im curious for you to take the data from Rahz's thread and see if the simulations youre doing at all reflect the real world results.

I would also be curious to see how close a simple conversion factor (~69 - 70) compares to this simulator.

Stop being pedantic what he is doing here has validity and if you do not like it then maybe you should jog on, instead of cluttering up his thread with negativity... Better still why don't you run your own "Real World" experiments since you are such an expert!

 

[Shugglet]

They will because it will show either if the spectrum or efficiency were important or if it was just the fact that it had higher red values. To me If I ran a 90CRI cob and it was 48% efficient but it produced more g/W than a 80CRI at 60% efficient that would say alot. So the goal would be to find the better spectrum as opposed to the most efficient COB. I thought that was a given.

So if you run the numbers it will put 70cri and 90cri ahead of 80cri in the 3000k bracket?

Stop being pedantic what he is doing here has validity and if you do not like it then maybe you should jog on, instead of cluttering up his thread with negativity.

You think light quality is actually more important than light quantity. Every study ever says otherwise, so I dont know how much weight to give your opinion in a thread like this.

 

[Shugglet]

Better still why don't you run your own "Real World" experiments since you are such an expert!

Why did you put real world in quotes? And where did I claim to be an expert?

 

[Johnnycannaseed1]

Clearly you are trolling... nothing new then eh?

I have already done a thread about what I have observed, seem to remember you trolling on that one as well.

Some of us actually test stuff real world, so we are privvy to the facts... But if you get off on studies and no testing well whatever floats your boat.

 

[Shugglet]

But if you get off on studies and no testing well whatever floats your boat.

Im actually advocating for more testing in this thread, do you know what studies do? They do testing to gather data. I remember the thread you are referring to, and ironically, you made it specifically to troll the many people that didnt agree with you (again based on data, not theory), hell, the title of the thread itself was a troll...

So does that make me the pot and you the kettle, or vice versa?