Final thread, promise. Any changes I need to make before I buy?

HandyGringo

Well-Known Member
Hey two quick and ugly paint drawings, one with 4 COBs and one with 5 COBS. I also think, that a good pentagon frame, distributes the light more effectively.
Just my two cents.
Regards
Hey thanks for that. Where did you get the cob light spread etc? Just estimates? and I'm going with 4. It's more than plenty for my needs ^^
 

Maito Gai

Member
Yeah just fictitious, but I think you get the idea.
@61.2%
(5) CXB3590 3500K CD 36V @ 1.05A (35.5W ea)
(1) HLG-185H-C1050
61,2% efficiency at full throttle and you still could dimm them...
 

HandyGringo

Well-Known Member
Yeah just fictitious, but I think you get the idea.

61,2% efficiency at full throttle and you still could dimm them...
But you could do the same with 6.. or 7 cobs right? I'm just poor, so.. I think 4 will be more than plenty for my 2x2 space. :/
 

Evil-Mobo

Well-Known Member
I don't understand why you feel the need for more than (2) CXB3590's in this application................especially if you say you're on a budget............
 

Danielson999

Well-Known Member
But you could do the same with 6.. or 7 cobs right? I'm just poor, so.. I think 4 will be more than plenty for my 2x2 space. :/
4 is perfect for a 2x2. They will be a foot or more above the plants so using a pentagon adds no value at all, it just forces you to put the cobs closer to the walls. 1 cob six inches from each wall corner creates perfect spacing.
 

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HandyGringo

Well-Known Member
I don't understand why you feel the need for more than (2) CXB3590's in this application................especially if you say you're on a budget............
Well, I'm on a budget, but I'm not going to be investing in a sub par solution, when the ideal solution would be 4 cobs.. ^^ Like if the upgrade from 2 cobs, to 4 cobs, is a 40% increase yield wise, and the increase from 4 to 5 is a 5% increase, it's not worth it in my book. If that makes sense.


4 is perfect for a 2x2. They will be a foot or more above the plants so using a pentagon adds no value at all, it just forces you to put the cobs closer to the walls. 1 cob six inches from each wall corner creates perfect spacing.
Exactly the spacing I was thinking about. 16 inches long and 16 inches wide + shape. That leaves roughly 6 inches on each side to the walls ^^
 

Maito Gai

Member
Evil-Mobo if he only would run two COBs, he should go with Vero's, they are more efficient at higher wattage. The spread wouldn't be that perfect.
HandyGringo 5 x cxb3590 fits perfectly to the hlg185.
 

Danielson999

Well-Known Member
Evil-Mobo if he only would run two COBs, he should go with Vero's, they are more efficient at higher wattage. The spread wouldn't be that perfect.
HandyGringo 5 x cxb3590 fits perfectly to the hlg185.
And 4 cxb3590 fit perfectly on an hlg120 which saves a bit more money and gives about 38watts sq/ft.
 

Maito Gai

Member
If you run them dimmed at 700mA you get 64% efficiency and during flowering you can raise to 1050.
But yeah 4 cree's will also handle it.
 

Evil-Mobo

Well-Known Member
Evil-Mobo if he only would run two COBs, he should go with Vero's, they are more efficient at higher wattage. The spread wouldn't be that perfect.
HandyGringo 5 x cxb3590 fits perfectly to the hlg185.
To me there's no sense in forking out the cash for top bin 3590's to run so many soft in a given area. There are other COB's that would accomplish the same for less $$, so when someone is talking budget going overkill on 3590's is not what comes to mind lol..........
 

Evil-Mobo

Well-Known Member
Well, I'm on a budget, but I'm not going to be investing in a sub par solution, when the ideal solution would be 4 cobs.. ^^ Like if the upgrade from 2 cobs, to 4 cobs, is a 40% increase yield wise, and the increase from 4 to 5 is a 5% increase, it's not worth it in my book. If that makes sense.




Exactly the spacing I was thinking about. 16 inches long and 16 inches wide + shape. That leaves roughly 6 inches on each side to the walls ^^
Good luck on your build sir
 

HandyGringo

Well-Known Member
To me there's no sense in forking out the cash for top bin 3590's to run so many soft in a given area. There are other COB's that would accomplish the same for less $$, so when someone is talking budget going overkill on 3590's is not what comes to mind lol..........
I plan on running them harder on flowering though. That's not what you mean though, is it? Like what cobs would you be using instead? ^^

Good luck on your build sir
Cheers!
 

HandyGringo

Well-Known Member
If you run them dimmed at 700mA you get 64% efficiency and during flowering you can raise to 1050.
But yeah 4 cree's will also handle it.
Do you think the 5th cob will make big difference? And the 185H 1050mA will be fine for both 5 cobs and 4 right?

Oh wait, no probably not for 5.. So, which one for 5?
 

Evil-Mobo

Well-Known Member
I plan on running them harder on flowering though. That's not what you mean though, is it? Like what cobs would you be using instead? ^^



Cheers!
I am feeling more ill than usual and not in the mood for an argument, and I can easily see this going down that route but whatever. Different strokes for different folks. When someone can show me with results how much of a difference a % in efficiency that's within any margin of error makes such a huge difference in a grow then I'm all ears.

I have (4) 3590's lighting the fuck up out of a 3X3 and it's more than enough light. You want to put the same in a 2x2............you say you're on a budget......etc.....etc........ Remember, there's more than one way to skin a cat, and at some point you have to stop arguing about efficiency and buy some shit and grow a plant right.......

Buying 3590's to push them soft seems pointless to me. Buy 3070's for that or look to Citizen. But to call a 2 COB 3590 light sub par solution is actually hilarious. We have a board sponsor who sells the crap out of 2 COB light setups and they're meant exactly for the space you speak of:

https://northerngrowlights.com/collections/all/products/photon-180cd-led-grow-light-1

And there are various grow journals on here by folks using that light with the different brand COB's too. His Vero light at $299 is a steal right now, I do not think you could build it with the same components for the price he's selling it for.

I would look to get 2 COB's, Either 3590's or Vero 29's your choice and run them 80 watts plus a piece if it was me. You could get away with two pin heat sinks one driver two cob's the optics of your choice and a dimming knob and call it a day. If you went Cree I'd say 3500K on the COB's and 4000K on the Vero's. Why clutter up such a small space with extra gear that doesn't need to be in there to make it work.

Just my opinion anyways. We are all entitled to ours right :bigjoint:
Cheers
 
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