Cheap and Cheerful DIY using Citizen cobs

CobKits

CobKits

Well-Known Member
Sneex said:
Wow awesome build!! I dont know anything about COB would love to learn this first time ive heard or seen one.. If anyone could break down a quick explanation and or run down of what is what and what means what that would be great or even link a thread that does please and thanks again bad ass build bro!!
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welcome! a good place to start is to search growmau5 on youtube, he has quite a few great vids on DIY cob builds
 
J

jaksa8

Active Member
Hello...im new to cob lights...i have 3 cree cxb3070 in my grow box now and i ordered 5x of CLU048-1212C4-353H6K2 to add 3 of them to cree cobs
Is this good cob?im planing to run those on 50w driver...how much does that output lumens?thanks
image-0-02-05-cb7891eb4c12f47e3acb57af99f37580b43eaf0871e0dab80d022cc1957ff172-V.jpg
 
BuddyColas

BuddyColas

Well-Known Member
jaksa8 said:
Hello...im new to cob lights...i have 3 cree cxb3070 in my grow box now and i ordered 5x of CLU048-1212C4-353H6K2 to add 3 of them to cree cobs
Is this good cob?im planing to run those on 50w driver...how much does that output lumens?thanks
View attachment 3821734
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Go to cobkits and all the info you seek is there. And citizens are good cobs. i built a bar of 4ks and they work great.
 
J

jaksa8

Active Member
Thank you...one more question
I have one driver 50w...20-38V 1500mah
Can i connect two of 1212 on one driver in parallel?
Will
 
BuddyColas

BuddyColas

Well-Known Member
jaksa8 said:
Thank you...one more question
I have one driver 50w...20-38V 1500mah
Can i connect two of 1212 on one driver in parallel?
Will
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The model of your driver? And the answer is probably yes, BUT you'll notice from the info about 1212s the voltage across the cob can vary +/- 8% of so and the would be "in spec." So if you had 2 of them and one was toward the high side and the other towards the low side, you could have significantly different current through each of the 1212s. Just be mindful of that when you fire them up. Hopefully you have a current meter and could check each one.
 
VenomGrower6990

VenomGrower6990

Well-Known Member
jaksa8 said:
Hello...im new to cob lights...i have 3 cree cxb3070 in my grow box now and i ordered 5x of CLU048-1212C4-353H6K2 to add 3 of them to cree cobs
Is this good cob?im planing to run those on 50w driver...how much does that output lumens?thanks
View attachment 3821734
Click to expand...
Go to Citizen Electronics website and download the citizen calculator. once you have it then you can input you specific cob and driver and it will give you an idea of what you will be running the citizen cobs at. The calculator looks like this.
20161103_163219.jpg
 
GreenMotion

GreenMotion

Member
jaksa8 said:
Hello...im new to cob lights...i have 3 cree cxb3070 in my grow box now and i ordered 5x of CLU048-1212C4-353H6K2 to add 3 of them to cree cobs
Is this good cob?
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I think it is not the best. It is not the top 3500 k of the citi line. This one has lower output then the normal one. The normal 3500k efficacy 152l/W, but the one you orderded is 119 L/W.

The chip you bought is under BBL and i would advise getting the same chips in 3000k and 4000k from the same seller on ebay since they are the normal version. I really hope you are in time to change the chips and maybe otherwise you can trade them in?

Here are the datasheets so you can compare yourself:
Normal version(M2K1) - http://ce.citizen.co.jp/lighting_led/dl_data/datasheet/en/COB_5/CLU048-1212C4_P3700_0516.pdf
Under BBL (H6K2) - http://ce.citizen.co.jp/lighting_led/dl_data/datasheet/en/COB_5/CLU048-1212C4_P3551_0216.pdf
 
nevergoodenuf

nevergoodenuf

Well-Known Member
They will be fine. I have done enough testing on different CRI's with minimal difference, including lab test on one run. The biggest difference I seen is cooler temps (4000k) if you need less stretch and warmer temps if you need more stretch.
 
J

jaksa8

Active Member
thanks...and if i decide to make flower light with this 5pcs on 50w each how big space can i cover with 250w?and will that be good
thanks again for help
 
J

jaksa8

Active Member
thanks for help....now im looking some chart for this tipe of cob but i can find can you guys help...
chart like this so i now how much lumens on different current...thanks.jpg
 
J

jaksa8

Active Member
I have but there is no number of cob like mine only CLU048-1212C4-50AL7K3
This is not the same like CLU048-1212C4-353H6K2
 
S

sleepless_canuck

Well-Known Member
Hello all.

I am a long time lurker first time poster.

I have decided to jump in and do a COB build.

I am looking to put 9 Cobs in a 1m by 1m tent or 3x3.
 
S

sleepless_canuck

Well-Known Member
Hello all, long time lurker first time poster.

I am diving into COB as I am not impressed with my Mars II.

I am running a 3x3 and would like to run 6 cobs and eventually add 3 more.

Here is what I am looking at;

https://cobkits.com/product/meanwell-hlg-185h-48a-driver/ x 2
Two of these should work fine for 3 1818@ 75.3W each (226W max)

https://cobkits.com/product/citizen-clu048-1818-80cri-choice-of-color-temps/
3 x 3500 and 3 x 4000.

Holders and all of that are easily found. I am curious if you all think this is a decent setup. I would like the ability to upgrade cobs down the road without changing drivers if that is possible.

The big issue for me right now is finding heatsinks for these. I do not want to run fans so I am looking for passive.

Looking forward to feedback.

Thanks
 
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