2016 Cree Horticulture Reference Design
- Thread starter stardustsailor
- Start date
So it barely beats DE HPS? 1.82 PPF/W...? I know DE isn't anything to sneeze at but Bridgelux, Samsung, Citi, and Luminus all put out much higher umol numbers. Cree's competition in this market is something like a Vero 29 Gen 7 Type C @ 50w = ~2.83 umol/J. Even BML's SPYDR fixtures put out better numbers and they have been out for a while.
They threw in some 660nm reds. Big deal - green is more important at these PPFD intensities anyways which the 4000k in their engine has plenty of.
Instead of spending time on this, maybe Cree should have been working on the successor to CXB3590.
Basically the selling points to this is that it is passively cooled and has uniform PPFD. In that case, skip this and go the quantum board route; you'll have better results.
They threw in some 660nm reds. Big deal - green is more important at these PPFD intensities anyways which the 4000k in their engine has plenty of.
Instead of spending time on this, maybe Cree should have been working on the successor to CXB3590.
Basically the selling points to this is that it is passively cooled and has uniform PPFD. In that case, skip this and go the quantum board route; you'll have better results.
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alesh
Well-Known Member
What's this based on? Any source?
Stephenj37826
Well-Known Member
Stephenj37826
Well-Known Member
Another Cree reference design..... I have a couple more but they where never distributed so I can't share unfortunately.....
Stephen linked the journal I was referencing. The whole thing is really a fascinating read - from their thought experiment they estimate that nearly 80%* of green light passes the outer chloroplasts compared to <1% red.
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NaturalFarmer
Well-Known Member
@stardustsailor
The heatsinks and pcbs used in this design are pricey as hell. Check out this site that sells mcpcb's for Cree and Osram in 1-3-5 and 7 emitters on mr16s for a few bucks. Don't think they have a 2x6 that fits the design here though.
http://led-mounting-bases.com/en/le...am-oslon-serie-ledil-led-lens-compatible.html
The heatsinks and pcbs used in this design are pricey as hell. Check out this site that sells mcpcb's for Cree and Osram in 1-3-5 and 7 emitters on mr16s for a few bucks. Don't think they have a 2x6 that fits the design here though.
http://led-mounting-bases.com/en/le...am-oslon-serie-ledil-led-lens-compatible.html
CobKits
Well-Known Member
that test is a joke with the way they measure light
of course the highly focused 550W will put more par on a 4x4 than a gavita at 36" with no reflective surfaces to catch the significant amount of light that falls outside the 4x4
its a decent design but theres no way youre replacing a gavita with that 550W fixture. maybe match 2 gavitas with 3 of those
of course the highly focused 550W will put more par on a 4x4 than a gavita at 36" with no reflective surfaces to catch the significant amount of light that falls outside the 4x4
its a decent design but theres no way youre replacing a gavita with that 550W fixture. maybe match 2 gavitas with 3 of those
ichabod crane
Well-Known Member
You complain about green light but you ignore the IR produced by the DE fixture.
Take out the 15% IR and the DE is about 1.46. Or lets say some of the IR is used say 10% is unused. Then it is 1.54 PPF.
The test may have its flaws but I dont see this as one that is a issue. At 15% removed for the IR the DE is at 80% of the PPF per watt and with 5% of the IR used it is at a little less than 85%.
PSUAGRO.
Well-Known Member
It was a "good" spec guess in 2015
.....................oh well, efficient horti-cobs are on the horizon, hopefullyAh this study again, detour effect and florescence capture..........still red leaning spd is what you want for flowering annuals, no doubt. Decades of one street light being used for flower over its more green driven/ higher output brother ===== LPS
Edit...... wrong Stephen quote, duuuuuuhhhhhh I suck
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WolfieLee
Well-Known Member
....I think I'm getting a headache..... to much techno for my current level for sure... interesting stuff, nonetheless. Thanks for the thread and references! Got to brush up on the tech terms and corresponding anagrams for sure, though. the way they are all screaming about the new 400 and 600W Blue (or super blue, or blue daylight) MH, it seems to me that the HID boys are starting to take remaining King in the Horti market very seriously....
Borrowing the thread;
Which cree mono in royal blue is most efficient? XP-E, XP-E2 or XQ-E?
Also the new bin for XP-E photo red seems to have reduced in size compared to older bins. Have trouble to find mcpcb that fits it.
Going for blurple setup to my lettuce garden as i'm not happy with the results from full spectrum white led.
Which cree mono in royal blue is most efficient? XP-E, XP-E2 or XQ-E?
Also the new bin for XP-E photo red seems to have reduced in size compared to older bins. Have trouble to find mcpcb that fits it.
Going for blurple setup to my lettuce garden as i'm not happy with the results from full spectrum white led.
CobKits
Well-Known Member
try pct.cree.com you can play with all kind of configurations
wietefras
Well-Known Member
IR is not part of PPF (400-700Nm), so you don't have to take that out.
Gavita's have been tested between 1.7umol/J and 1.8umol/J from the whole fixture (which means after reflector losses). That's all PAR light used by the plants.
The added IR coming from HPS can be a blessing or a curse depending on your local climate.
ichabod crane
Well-Known Member
They have the IR on the light chart on the Cree page. So I assumed they added it.
Cree, Inc. All rights reserved
6
• Physical measurements
(22.3”L x 9.4”W x 13.4”H)
• Weight (16lbs)
• PPF/W (1.72)*
• Wattage (1064W)
Incumbent : Gavita Pro HPS 1000W (With Philips Bulb)
*PPF measurements performed after the manufacturer’s recommended burn-in period.
Wavelengths PPF%* RF%
UV 300 399 0.0% 0.3%
Violet/Blue 431 500 4.8% 4.9%
Green/Yellow 501 580 26.2% 21.7%
Orange/Red 581 700 68.9% 51.8%
Far Red 701 780 0.0% 6.0%
IR 781 1000 0.0% 15.3%
It did not copy well but it is the bottom right number (15.3%).
You can see there chart on the link in the first post. But to me it looked like they added it but in the chart it says 0.0% and is the number to the left of the 15.3%.
So I was wrong on that.
Cree, Inc. All rights reserved
6
• Physical measurements
(22.3”L x 9.4”W x 13.4”H)
• Weight (16lbs)
• PPF/W (1.72)*
• Wattage (1064W)
Incumbent : Gavita Pro HPS 1000W (With Philips Bulb)
*PPF measurements performed after the manufacturer’s recommended burn-in period.
Wavelengths PPF%* RF%
UV 300 399 0.0% 0.3%
Violet/Blue 431 500 4.8% 4.9%
Green/Yellow 501 580 26.2% 21.7%
Orange/Red 581 700 68.9% 51.8%
Far Red 701 780 0.0% 6.0%
IR 781 1000 0.0% 15.3%
It did not copy well but it is the bottom right number (15.3%).
You can see there chart on the link in the first post. But to me it looked like they added it but in the chart it says 0.0% and is the number to the left of the 15.3%.
So I was wrong on that.
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NaturalFarmer
Well-Known Member
I put these together last night and was thinking of mounting them to a 140mm but decide otherwise since I was just fucking around with this method and want to go with the Oslon 80s on my build. Was thinking however, this may be much more cost effective using the same ratios of 4000k to 660nm but it requires reflow.
http://led-mounting-bases.com/en/
MCPCBs, MR16 Thermal adhesive, Ledil lenses. Free shipping over $200
http://led-mounting-bases.com/en/
MCPCBs, MR16 Thermal adhesive, Ledil lenses. Free shipping over $200
