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i would go with 9 x 3590 cree cob run off meanwell 1050ma driver .minimal heat,maximum photons :cool:
yes flowering ,best pic i have that shows distance from cob to cola.thats a 18inch wall fan
View attachment 641225
yeah i thought the same thing running 600w hps at 6 to 8 inches on a mover ,then i got some gavitas and run them at 30in up and 700w and plants are much happier.then i go to 35w cobs at 24in and plants have never been so happy.so happy i had to learn new feeds from all the nutes my plants wanted now that they are happy and healthy.sure you can run a 400w at 12 inches,dont mean its the best method,see my point?That is a Large distance. Makes you re-think problem heat is said to pose for HPS.
20cm is the minimum distance from HPS to prevent Bleaching, but I will drop the parabola down to 10cm to mature heads. The damage is overshadowed by return as long as the damage is not to early
Certainly understand what you are saying, it is not about right or wrong, just your experience for best return :)dont mean its the best method,see my point?
i would go with 9 x 3590 cree cob run off meanwell 1050ma driver .minimal heat,maximum photons :cool:
i would go with 9 x 3590 cree cob run off meanwell 1050ma driver .minimal heat,maximum photons :cool:
im using both 36v and 72 v in different areas of my flower room.both are being run off the same mw 1050ma drivers so the 36v are doing about 35w each and the 72v are closer to 75w each so spacing on those 72v can be further apart like 18 inches.so far i like the 36v setups better.if your looking to piece this project together yourself i would look to kingbrite on alibaba,he has all parts needed incuding drivers and heatsinks.or for kits ready to assemble on your frame look at timbergrowlights.com those kits are easy to put together and priced very reasonable for what you get.Have changed my mind several times during this processes.
LED's could replace my HPS parabola, but I do not personally see a big enough gain right now.
I have liked your thinking because it makes sense.
If I start with 9 x 3590 cree cob run off meanwell 1050ma driver, the system is going to be efficient in working light per watt. I can use the system to maintain clones and experiment in regards to flowering.
Do you have a shopping list for your project to share?
Did you use 72 volt COB's, what drivers are used?
Thanks
Looking at a self build from scratch!using both 36v and 72 v in different areas of my flower room.both are being run off the same mw 1050ma drivers so the 36v are doing about 35w each and the 72v are closer to 75w each
Looking at a self build from scratch!
What specific driver are you using to run the 9x 36v COB, and how many 72v COB do you run on this same driver?
Anybody buying from Kingbrite paying by bank transfer, keen to hear feedback.
first question is no,not parallel wiring.i use series wiring with those drivers.mw does make dif style drivers that others use for parallel wiring i just dont like that method personally.The data sheet for hlg-185h-c1050b lists a single output.
Just to confirm, this means you are connecting the 5 COB's in parallel to the single output?
I have a few different plans for this equipment, including general lighting in an off-grid shed.
How far could you run the 72v COB from Driver using well overrated cable?
What would you use in Male/female cable plugs for quickly changing COB's?
I have a few other questions if you can help, just wanted to go through things systematically so I can ask the right questions!
Thanks.
i use series wiring with those drivers.mw does make dif style drivers that others use for parallel wiring i just dont like that method personally.
HLG-185H-C1050B 95 V to 190 V.
With this type driver you just need to make sure your cob voltage falls between those numbers of 95v and 190v so you added the 36 and 72v correct. But the current will always remain 1050ma because its a cc (constant current ) driver. So in this example it runs 3 to 5 cobs @36v or just 2 @72v.
But.... if you run 36v cobs they will be putting out about 35w each because 1050ma x 35v (cobs are rated 36v @2800ma) so the math is 35v x 1.050=35.05w
And if you use 72v cobs on that same driver it will be much higher watts per cob.something like this.72v x 1.05 =72w per cob. So in this case your not maxing out the driver.
If you take the time to watch the growmau5 videos on YouTube part 1 thru 5 or 6 he goes through all the dif scenarios in much better detail then i could ever explain lol
i dont really have an opinion on those leds.it would appear to be taking a step backwards in tech using smaller diode clusters like they suggest in the article.there are tons of commercial panels already availible using this tech at very cheap prices on amazon ect.Gotcha :)
I might be able to get the Youtube movies downloaded to watch.
Meanwhile there is a very interesting Cree design in this post:
https://www.thcfarmer.com/community...reenhouse-lighting-led-vs-hid-fixtures.84830/
Welcome your ideas.
Horto