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

URSA LED

URSA LED

Well-Known Member
Rahz said:
I'm thinking the 200 and 1200 would be especially interesting. The 200 under driven at 100 watts would make a good multi emitter setup, and 1200 driven at 5-600 watts might make a good single emitter lamp for a 5x5 or 4x4.

I'm also thinking white/red would be more desirable than blue/red. I know the led market has been saturated with red/blue because of the Mcree curve but that curve isn't all or nothing. A white light with a variable amount of red would be nice. 4000-5000K with separate red channel would take a grow through full cycle with a full spectrum through the whole process.
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Hi Rahz,

Thank you for the suggestion.
I'm pretty sure (but I can't guarantee ;) ) we'll have Duet series featuring white light (4000K - 5000K / 80-90+ CRI) and red light by Hempcon 4/20.
 
Rahz

Rahz

Well-Known Member
That sounds great, but what is the reason for high CRI? If the chip is getting a boost from a pure red source that would negate the main benefit of a high CRI light. 70-80 CRI cobs have been the choice of growers. If efficiency didn't suffer high CRI might be okay but slightly lower efficiency is usually the case. Multi spectrum DIY builds are usually 70 CRI 4000K white with 640-660nm red.
 
URSA LED

URSA LED

Well-Known Member
Rahz said:
That sounds great, but what is the reason for high CRI? If the chip is getting a boost from a pure red source that would negate the main benefit of a high CRI light. 70-80 CRI cobs have been the choice of growers. If efficiency didn't suffer high CRI might be okay but slightly lower efficiency is usually the case. Multi spectrum DIY builds are usually 70 CRI 4000K white with 640-660nm red.
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Hello Rahz,

On our COBs, the change in efficiency is insignificant.
Higher CRI (90+) means higher red wavelengths on white light. Your reasoning is correct since a pure red source is already present.

Most grow lights on the market do not feature high CRI 90+ because of the "increase in exponential manufacturing costs".
 
URSA LED

URSA LED

Well-Known Member
SilvioBerlusconi said:
Seriously: How about just making pure red COBs? There is no other manufacturer that makes them.
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Great suggestion :)
You can also run our DUET series to only produce pure red.
Cannabis plants need blue light albeit much less when flowering;

For a flowering room, I suggest doing a 1/12 ratio with our fixed ratio duet cobs... pending release!
 
littlejacob

littlejacob

Well-Known Member
Bonjour
I like the shape who remind a ying and yang...very good idea but at what distance must be the 60 from the plant to have a good mix of white and red?
Why not the same positioning than the big one?
What about availability and prices?
And 60 spec sheet?
CU
 
alesh

alesh

Well-Known Member
Alex Lau said:
Hello Everyone!

I'm excited to tell everyone today, that I got my hands on a Duet 2400 Fixture. This is the first one we have produced with fixtures from our sister company. It goes all the way up to 2400 watts.

I can safely say, in terms of power output, this fixture is now the most powerful LED dual spectrum single source lighting in the world. For those of you who are new to LEDs, this is easily an equivalent of a 5000 - 7000 watt HID replacement in terms of power output.

Here are some pre-testing pictures; I'll have some turned on pictures in a couple of hours once we wire it up and put on our in-house reflector.

We will be showcasing this fixture in Hempcon next week.
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Well, actually, HIDs put out more power per watt than this COB. I wouldn't make such statements on this forum.
 
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2cent

2cent

Well-Known Member
but the question is..... Does it grow plants! or does it cook them?? any 1 can shine a light on a wall n say its bright, put it over soem plants
i was told on here blue purple blurple lights suck ass! so whats the score?
do you have data for this?
 
P

PurpleBuz

Well-Known Member
Alex Lau said:
Great suggestion :)
You can also run our DUET series to only produce pure red.
Cannabis plants need blue light albeit much less when flowering;

For a flowering room, I suggest doing a 1/12 ratio with our fixed ratio duet cobs... pending release!
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pending days weeks or months? where would we buy them?

smaller sizes like the duet 60 are more useful for even distribution, especially as your technology shines when driven hard.
 
frica

frica

Well-Known Member
Rahz said:
I'm thinking the 200 and 1200 would be especially interesting. The 200 under driven at 100 watts would make a good multi emitter setup, and 1200 driven at 5-600 watts might make a good single emitter lamp for a 5x5 or 4x4.

I'm also thinking white/red would be more desirable than blue/red. I know the led market has been saturated with red/blue because of the Mcree curve but that curve isn't all or nothing. A white light with a variable amount of red would be nice. 4000-5000K with separate red channel would take a grow through full cycle with a full spectrum through the whole process.
Click to expand...
Yea, green light (RGB is perceived as white) is just as important if not more important than blue light
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20150009399.pdf
"
Green light.Green light (500-600nm) falls between broad-band blue and red light
along the PAR energy spectrum. Green often is disregarded as an unimportant
waveband in photosynthesis because absorption spectra of extracted leaf chlorophyll
pigments indicate very weak absorption in the g
reen region of the PAR. Because
chlorophyll has major absorption peaks only in the red and blue regions, researchers
initially selected first red, later blue, LEDs for first-
generation LED arrays to support
plant growth. However, intact leaves do absorb
considerable green light, and in arelative quantum-
efficiency curve for photosynthesis vs. PAR wavelengths, some
wavelengths of broad-band green actually are more efficient than certain
wavelengths of the blue band. Overall, however, broadband green is s
lightly less efficient than broadband blue. However, when leaf canopies close, red and blue light
are absorbed strongly by upper or outer leaf layers, whereas green light penetrates
to interior leaf layers, where it subsequently is absorbed and drives pho
tosynthesis of the inner canopy (14). Thus, light sources containing some green can be more
effective in stimulating crop growth than are red + blue sources alone, such as when
foliar canopies are closed. When applied together with blue light, green has
effectsopposite to blue on stomatal aperture (15). Yet another useful feature of green light
is that the human eye perceives red + green + blue (RGB) light as white light, so if all
three wavebands are present simultaneously in plant-
growth light, researchers and growers are able to visually evaluate the stress status of crops, the incidence ofphysiological disorders, and “true” leaf color (the way it looks outdoors), whereas if only red + blue are present, green tissue looks purple, grey, or black, and
physiological stress or disease diagnosis is difficult"

Blue+red, blurple lights should be a relic of the past since it's already been proven that green light is very beneficial
 
hillbill

hillbill

Well-Known Member
Sunrise today was a stunning orange/red getting brighter and whiter quickly just like normal. Like it has been for millions of centuries. This is the light that plants have used everyday to become what they are today. Aside from immoral prohibition, most girls would be out in the sun.

I hate blurple!
 
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