Why no red COB's?

Rahz · Feb 11, 2016

Well the bottom line is most manufacturers have no desire to pump money into red cobs, not that there aren't red diodes available with good efficiency.

CXB at 50-65% efficiency is nice. Red/white is potentially a refinement of the spectrum, but if it can't match the output then it's just a gimmick like spiderman.

BOBBY_G · Feb 11, 2016

bro... you talkin shit on spiderman? how do i dislike your post?

coolj · Feb 11, 2016

Resinhound said:
Just so I understand this clearly...cree doesnt know how to make a proper red COB,but you guys have the secret technology to build them...you just dont have a ppfd meter to get the specs from them huh? Is that right or am I misunderstanding?im not saying this is what it is but it looks like a money grab to me,I truly hope thats not the case.I can just say for the last 2 weeks "specs are coming next week".Im truly hoping we have a good alternative to cree for a horticultural led application,but when you come in here and talk about how cree doesnt know how to build a red spectrum,yet you cant even get readings off your chips cause you dont have a ppfd reader that seems kinda dodgey to me.

stop being a dick!

post your lab and chip making capability along with your ppfd reader.

Resinhound · Feb 11, 2016

coolj said:
stop being a dick!

post your lab and chip making capability along with your ppfd reader.

I never claimed to make chips bro,just wondering how they know their stuff is better when it hasnt even been really analyzed yet.Its not like there are led chip manufacturers hiding their specs or anything.Just wondering why its taking so long to get ppfd and umol readings since they are already selling them,youd think that stuff would be availiable but whatever,ill just buy something else no biggie.

Rahz · Feb 11, 2016

BOBBY_G said:
bro... you talkin shit on spiderman? how do i dislike your post?

I think Spiderman is swell, it's just that putting him in advertisements (which I'm not accusing anyone in particular of doing) doesn't make the plants grow any faster.

However, the Hulk is green. You do the math.

BOBBY_G · Feb 11, 2016

incredible bulk'd

coolj · Feb 11, 2016

Resinhound said:
I never claimed to make chips bro,just wondering how they know their stuff is better when it hasnt even been really analyzed yet.Its not like there are led chip manufacturers hiding their specs or anything.Just wondering why its taking so long to get ppfd and umol readings since they are already selling them,youd think that stuff would be availiable but whatever,ill just buy something else no biggie.

Ok, I can respect that, I apologize .

GreenSanta · Feb 11, 2016

because you cant see shit under red LEDs. because great weed was grown without it. hehe honestly gonna run the 3500 kelvins soon because I think there was too much red in the 3000s ...

Rahz · Feb 11, 2016

Resinhound said:
I never claimed to make chips bro,just wondering how they know their stuff is better when it hasnt even been really analyzed yet.Its not like there are led chip manufacturers hiding their specs or anything.Just wondering why its taking so long to get ppfd and umol readings since they are already selling them,youd think that stuff would be availiable but whatever,ill just buy something else no biggie.

Exactly. If someone develops a superior technology, good on them. If they do it with a budget, even better. But we're being told it's extreme power and the best on Earth while also being told they (the manufacturer) still need to do measurements. So how do they know? They either do or they don't. The reality is that hyped up advertisement is the norm in the Chinese horticultural lighting market and these new cobs are beginning to seem no different.

URSA LED · Feb 11, 2016

Resinhound said:
Just so I understand this clearly...cree doesnt know how to make a proper red COB,but you guys have the secret technology to build them...you just dont have a ppfd meter to get the specs from them huh? Is that right or am I misunderstanding?im not saying this is what it is but it looks like a money grab to me,I truly hope thats not the case.I can just say for the last 2 weeks "specs are coming next week".Im truly hoping we have a good alternative to cree for a horticultural led application,but when you come in here and talk about how cree doesnt know how to build a red spectrum,yet you cant even get readings off your chips cause you dont have a ppfd reader that seems kinda dodgey to me.

Yes, you are correct. We don't have a ppfd meter but it's coming in next week.

BobCajun · Feb 11, 2016

Alex Lau said:
I can make a fully red COB to your requested spectrum peak
640 , 650, 660 with extreme optical power

If you can get stuff made then I suggest making some MCOB based lamps. Regular COBS are no better than single LEDS, while MCOBS have much higher efficiency and heat dispersion. Oddly, all that seems to be around made with them so far are flashlights. With the world's first MCOB growlight you could rule the market.

URSA LED · Feb 11, 2016

Rahz said:
Exactly. If someone develops a superior technology, good on them. If they do it with a budget, even better. But we're being told it's extreme power and the best on Earth while also being told they (the manufacturer) still need to do measurements. So how do they know? They either do or they don't. The reality is that hyped up advertisement is the norm in the Chinese horticultural lighting market and these new cobs are beginning to seem no different.

It's just that, sourcing a PPFD meter is not like shopping on amazon.
Each PPDF has their own measuring specification, some do not measure as low as 450nm, and some do not go as high as 660nm.
Some don't come with spectrum filters, some don't come with attachable ppfd readers and must be hand held .. etc.

So, we custom ordered a lab grade ppfd meter which takes time to manufacture and build. So I do apologize for not shopping on Amazon Prime.

URSA LED · Feb 11, 2016

BobCajun said:
If you can get stuff made then I suggest making some MCOB based lamps. Regular COBS are no better than single LEDS, while MCOBS have much higher efficiency and heat dispersion. Oddly, all that seems to be around made with them so far are flashlights. With the world's first MCOB growlight you could rule the market.

Nice. I'll look into this.

rob333 · Feb 11, 2016

Alex Lau said:
http://www.fcopto.com/duet-series/

messaged these guys like 5 times with no reply about getting some leds now they can go fuck themselves going for the new philips range

rob333 · Feb 11, 2016

luxeon led arrays can now have my money

Rahz · Feb 11, 2016

Alex Lau said:
It's just that, sourcing a PPFD meter is not like shopping on amazon.
Each PPDF has their own measuring specification, some do not measure as low as 450nm, and some do not go as high as 660nm.
Some don't come with spectrum filters, some don't come with attachable ppfd readers and must be hand held .. etc.

So, we custom ordered a lab grade ppfd meter which takes time to manufacture and build. So I do apologize for not shopping on Amazon Prime.

Okay. You don't have a PPFD meter and haven't taken any readings. Care to share how you know you have one of the best materials on earth to convert the spectrum with minimal loss?

URSA LED · Feb 11, 2016

Rahz said:
Okay. You don't have a PPFD meter and haven't taken any readings. Care to share how you know you have one of the best materials on earth to convert the spectrum with minimal loss?

Our next line of COBs will produce UV and the current materials used to convert into red spectrum can't be paired with UV. So we're looking for new materials at the moment.

Rahz · Feb 11, 2016

Alex Lau said:
Our next line of COBs will produce UV and the current materials used to convert into red spectrum can't be paired with UV. So we're looking for new materials at the moment.

I will ask again. You have stated that you have one of the best materials on Earth to convert the spectrum with minimal loss. If you haven't taken any PPFD readings, how do you know you have one of the best materials on Earth to convert the specturm with minimal loss? Have you measured your process by some means? And if so, what are the results?

URSA LED · Feb 11, 2016

Rahz said:
I will ask again. You have stated that you have one of the best materials on Earth to convert the spectrum with minimal loss. If you haven't taken any PPFD readings, how do you know you have one of the best materials on Earth to convert the specturm with minimal loss? Have you measured your process by some means? And if so, what are the results?

We are able to measure ppfd readings at the COB level using our Dome Lab which measures a bunch of other readings, take a look at our Duet 2400 spec sheet.
However, at the fixture level, which encompasses distance and other variables, we need a differentt system.

Airwalker16 · Feb 11, 2016

Alex Lau said:
Yes, you are correct. We don't have a ppfd meter but it's coming in next week.

Yup, you said that. You're definetely a chinese seller trying to amp up somethin that it's not. You can just tell from the way you post.

Why no red COB's?

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