Can somebody calculate what L/pw I will get with Vero 29 3500k 80 CRI@ 45W?

I want to know the Lumens Per Watt for Vero 29 3500K 80CRI (BXRC-35E10K0-C-7X) if I was to run the COB at 45W (if possible?)

The official datasheet is http://www.bridgelux.com/sites/default/files/resource_media/Bridgelux DS93 Vero 29 Gen 7 Array Data Sheet 20170208 Rev I.pdf

However this just shows common V/mA setups, and doesnt list the minimum values.

Is there another calculator Vero offers? Or perhaps some others here have other values?

I am guessing it will be around 190 Lumens per watt(based off the 56W @ 190l/pw reading in the sheet above) but do not want to assume this...

Bridgelux has a product simulator, indicates 194 LPW at 700ma (45w). Efficiency and/or PPF is what you're after though. They haven't published a 3500K spectrum, but the 3000K 80CRI spectrum is 57% efficient at that current so 3500K 80CRI should be slightly higher... but efficiency isn't the whole story either. Some evidence is suggesting 3000/80 or perhaps 3000/90 will be a better choice.

Thanks for the advice Rahz - Just found that Vero spreadsheet you mentioned...

You said they didnt publish a 3500k 80 cri spectrum? I maanged to find a 3500k 80 CRI cob in the spreadsheet dropdown, is that what you are refering to?

194 LPW is great, how can I calculate the PPF though? Its an area I must have skipped over(along with PPFD unless its the same thing)

Is the evidence of 3000/90 looking strong? As I will be buying 40/50 of these I will consider it...

I have read a few reports that the veros lean more towards far red than the competitors in the same posted spectrum.. So 3500k should be ideal if you want a full spectrum chip..

Joe34 said:

Thanks for the advice Rahz - Just found that Vero spreadsheet you mentioned...

You said they didnt publish a 3500k 80 cri spectrum? I maanged to find a 3500k 80 CRI cob in the spreadsheet dropdown, is that what you are refering to?

194 LPW is great, how can I calculate the PPF though? Its an area I must have skipped over(along with PPFD unless its the same thing)

Is the evidence of 3000/90 looking strong? As I will be buying 40/50 of these I will consider it...

Click to expand...

The spectrums are in the datasheet in a graph but they're not all listed. If the spectral graph is digitized it can be factored with photon energy across the spectrum to arrive at the QER which can be used to determine PPF. You can read about it here: http://rollitup.org/t/math-behind.868988/

But if you don't have a spectrum to digitize you can't get the QER or PPF. You can work out a reasonable estimate by comparing the QER for known spectrums. 3000/80 QER is 4.68 and LER is 332. 3000/90 will be slightly lower.

BUT, even PPF doesn't provide us with an exact indicator of photosynthetic potential and my testing has indicated that the spectrum that provides the best PPF isn't the one that yields best. I feel confident via testing that 3000K is the best cob color temp but am still unsure of the best CRI. 3000/70 did well, better than 3500/80 but not as good as 3000/90. The 3000/80 results were flawed and need to be tested again, but it's a reasonable assumption that 3000/80 will also out perform 3500/80. Whether the performance of 3000/80 is between 3000/70 and 3000/90 remains to be seen, but I think 3000/90 does look strong and even 3000/80 would be a good choice.

BUT, even PPF doesn't provide us with an exact indicator of photosynthetic potential and my testing has indicated that the spectrum that provides the best PPF isn't the one that yields best. I feel confident via testing that 3000K is the best cob color temp but am still unsure of the best CRI. 3000/70 did well, better than 3500/80 but not as good as 3000/90. The 3000/80 results were flawed and need to be tested again, but it's a reasonable assumption that 3000/80 will also out perform 3500/80. Whether the performance of 3000/80 is between 3000/70 and 3000/90 remains to be seen, but I think 3000/90 does look strong and even 3000/80 would be a good choice.[/QUOTE]

So, you say is more better 3000k 90 cri then 3000k 80cri?