Homesteader
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Uh no
i think the problem with using LED for greenhouse would be the weak par at such a height .
lets be realistic here having them lights 5 feet away from plants what are they really putting out .
Pretty much the same as a flashlight
i remember we used long time ago just plain 100 watt light bulbs hanging down near the plants
Uh no
If you read the link pg 17
Cree Reference design is 4.9 feet
Gavita height is 3.2 feet
Little more than a flashlight.
I agree bang for the buck a chinese lamp may be best bet for 3 hours a day but this thread kinda turned to the cree design
Fuck yea that is what its all about trial and error no matter what i am very impressed with cobs but there just not there yet to force me to throw away De units but i am sure there will be a time when de units will be a museum piece :)I don't think COBs are ideal for Horticulture either. They are better spotlights in museums imo. I'm going to build out this cree model this winter because I believe the 5 w and 3w are the way to go for cannabis and penetration
PCB has two on-board configuration 1x12s or 2pX6s.I believe they have two configurations. One in series unless I am reading that wrong.
http://www.sinkpad.com/inner-product.php?id=46
Fuck yea that is what its all about trial and error no matter what i am very impressed with cobs but there just not there yet to force me to throw away De units but i am sure there will be a time when de units will be a museum piece :)
were advancing faster them ever in the lighting industry but it all comes down to cost reliability resources i mean its not hard to litterally walk down to a store and buy a DE unit where as if something failed with obs your waiting a week for UPS to show up
but both have there unique benifits right
PCB has two on-board configuration 1x12s or 2pX6s.
This is all I could find which could mean 12 in series.
Cree Horticulture Reference DesignCree shows how to build a 553w LED module that performs at par with Gavita Pro with Phillips bulbs drawing 1064 watts.
@Jasha
Did you reflow solder with a hot plate?
https://www.thcfarmer.com/community/threads/cree-smd-xlamp-led-build.85272/
@Jasha How is the light? Are you happy with it? How was it at lower canopy height? 5 feet like the model seems hard to maintain in my case.
Did you see the new HE version?
http://www.cree.com/led-components-and-modules/products/xlamp/discrete-nondirectional/~/media/Files/Cree/LED Components and Modules/XLamp/Data and Binning/XLampXPEHEW.pdf[
I have seen them! I'm using the same LEDs as the reference design, with the addition of some G2 blue. I have two small engines, each mounted with one mcpcb wired in series. I haven't had the chance to grow anything with the engines yet, I just finished it yesterday. Growing results to follow. But two should be ideal for 1-3 plants, as allowed by prop 64 in Ca now.
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