DUET 2400 (LED FIXTURE) - UP TO 2400 WATTS (Flip Chip Opto)

ttystikk

ttystikk

Well-Known Member
I'm a tree specialist. I grow six footers under a 7'6" ceiling so I don't light them from above, but rather from the side.

Any day now I'll be taking delivery of an order of custom built 4 COB modules to replace my 860W CDM lights. I'm not alone in spending thousands for the right lights, and I'm not alone in doing plenty of homework here and elsewhere before I made my purchase of 100 Cree CXB3590 chips (3500k, 72V, driven at 50W apiece to get 56% efficiency) and 25 Meanwell 200W drivers.

If you'd like this community to embrace your technology, you'll need to take the step of full disclosure about your chips in terms of their thermal performance and light output specifications. I wasn't making any purchase without such knowledge and I'm sure I'm not alone.

I share this with you in the hope that it helps you understand who we are and what we need as customers. I wish you the very best of success, and it is through an understanding of our needs that your success will be guaranteed.
 
Last edited:
URSA LED

URSA LED

Well-Known Member
Johnnycannaseed1 said:
Hey Alex don't want to sound cynical but;

1) Who actually owns the patents for the flip chip technology?

2) You mention your "thermal transfer is measured at two decimal places lower than the best competitor"... I take it you mean the thermal resistance figure of your packages substrate?

If so then I find the figure you quoted very very hard to believe... Do you have test data and test data footage to prove this, like showing us Heat dissapation/thermal data, Tj, Tc data and Rj data plus all the calculations?
Click to expand...
Hi Johnncannaseed1,

Yes, we can :) schedule an office visit.
 
Johnnycannaseed1

Johnnycannaseed1

Well-Known Member
Alex Lau said:
Hi Johnncannaseed1,

Yes, we can :) schedule an office visit.
Click to expand...
As much as I would love to come and pay you guys a visit, you are too far awayfrom me:lol:

I think in the spirit of openess it would be much better if you posted data proof here, for everyone to assess.

The thing is a lot of companies like to make bold claims but they never back them up, now I am not saying you fall into this category, but you have made a seriously bold claim with regards to the thermal efficiency of your chips, as well as talk of patent ownership etc, so posting proof here to back up your claims would do wonders for your companies credibility as this is something all the major players do in their datasheets.:peace:
 
Last edited:
littlejacob

littlejacob

Well-Known Member
Bonjour
So same as my friends...but please make square cobs...we do not have round grow space...we want to light square feet and square meter...so for me an horticultural cob MUST be square or rectangular it is logical...and at equal efficiency I would choose the square one!
Why do you choose this shape for square areas?
CU
 
PicklesRus

PicklesRus

Well-Known Member
Johnnycannaseed1 said:
As much as I would love to come and pay you guys a visit, you are too far awayfrom me:lol:

I think in the spirit of openess it would be much better if you posted data proof here, for everyone to assess.

The thing is a lot of companies like to make bold claims but they never back them up, now I am not saying you fall into this category, but you have made a seriously bold claim with regards to the thermal efficiency of your chips, as well as talk of patent ownership etc, so posting proof here to back up your claims would do wonders for your companies credibility as this is something all the major players do in their datasheets.:peace:
Click to expand...
Why don't we work together here and give Alex a set of criteria to build data into, what are the key points that we need him to provide us?

Why don't we start with a full white cob:
  • Chip model
  • Color Temperature
And then for that chip let's say you provide three sets of data, (max current, half current, 1/4 current).
  • Amps
  • Factor 50c junction temp
  • Lumens at 50c junction temp
  • Vf at 50c junction temp
  • 50c efficiency % (energy in minus watts converted to heat)
  • Umol/s /W
  • $ / usable light Watts (watts minus heat watts)
Did I get that right everyone? Alex you can check out the led efficiency spreadsheet on ledbuilder.org under the quick links to see the format that everyone here is working off. Put the data in that format and as @ttystikk said guarantee you'll have an easier time communicating your product.
 
URSA LED

URSA LED

Well-Known Member
Thanks pickle, I'll get my team working on this so you guys have a better understanding of our COBs.

PicklesRus said:
Why don't we work together here and give Alex a set of criteria to build data into, what are the key points that we need him to provide us?

Why don't we start with a full white cob:
  • Chip model
  • Color Temperature
And then for that chip let's say you provide three sets of data, (max current, half current, 1/4 current).
  • Amps
  • Factor 50c junction temp
  • Lumens at 50c junction temp
  • Vf at 50c junction temp
  • 50c efficiency % (energy in minus watts converted to heat)
  • Umol/s /W
  • $ / usable light Watts (watts minus heat watts)
Did I get that right everyone? Alex you can check out the led efficiency spreadsheet on ledbuilder.org under the quick links to see the format that everyone here is working off. Put the data in that format and as @ttystikk said guarantee you'll have an easier time communicating your product.
Click to expand...
 
Rahz

Rahz

Well-Known Member
If I could make a suggestion, the number or red diodes should be fewer than the white... Just enough red to get the 660-680 relatively equal to the white output of 600-640 would be perfect. It's that early drop off that is the only shortcoming of using a pure white LED solution. As an added benefit, If you're getting more efficiency with the phosphor conversion than red diodes, lowering the ratio of red to white would increase the overall efficiency of the chip.

And also as was mentioned earlier, it would be smart to also offer red only COBs in smaller wattages 40-100 watts. There is a red cob on the market in China but the efficiency is poor and not worth using. If the various versions of the Duet cannot compete with the efficiency of Cree's CXB line, specifically the 3590s, then I would likely not consider buying them... but if there was a red cob with reasonable efficiency I could run alongside the Cree cobs I might still have an interest there.

Anyway, watching this thread with interest. I hope you guys come up with a great product/s.
 
S

SilvioBerlusconi

Active Member
ttystikk

ttystikk

Well-Known Member
littlejacob said:
Bonjour
Square cob...!?!
Better than round one for grow area!
Nobody agree???
I want a round growbox if they keep the round shape...!
CU
Click to expand...
A square COB won't satisfy the corners like a square French meal, I'm afraid. You're much better off pursuing your current strategy of simply spreading smaller COBs apart to get the desired even distribution pattern.
 
whitebb2727

whitebb2727

Well-Known Member
Alex Lau said:
Hi 2cent,

We are actually working out the kinks of having hobbyist/growers try our lights.
The best way to be part of this program is to send us a message through our website and requesting for it. You'll need to provide your background and links to your grows as well.

-Alex
Click to expand...
Link?
 
You must log in or register to reply here.
Top