How many cobs? (1.84 feet x 2 feet)

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stuggy123

New member

• May 5, 2019

• #1

Hi everyone


I just finished building my grow room. The plan is to buy some cxm-22 cobs, as they seem very good for the price.



But how many cobs should I buy? And which driver? And are the pin based heatsinks the best kind of heatsink to get?


I just want the best setup as possible [FONT=&quot][/FONT]



Size of the grow room: 56 cm. (1.84 feet) x 61 cm. (2 feet) x 120 cm. (3.94 feet).


Square feet of the grow room: 3.68


Stuggy

 

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ronbo51

Member

Veteran

• May 5, 2019

• #2

I think you want 30-50 watts per sq ft. Wander over to the Grow Diary thread and click on the subhead Micro grows. Check out the " Off the shelf" led thread and Blynx's micro grow. You will see what you are after.

 

Koondense

Well-known member

Veteran

• May 5, 2019

• #3

4cobs@50W each, dimmable.

 

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stuggy123

New member

• May 5, 2019

• #4

Thanks for the replies

Okay, i'm going to take a look at the thread, thanks.

Koondense, is there a specific driver you would recommend for that setup?

 

Koondense

Well-known member

Veteran

• May 5, 2019

• #5

Yes, probably the hlg 240 C1050 would be the best, if your leds are a 50V version.
Cheers

 

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stuggy123

New member

• May 6, 2019

• #6

Thanks once again!


I think I will buy the hlg 240 C1050 driver and 4 cobs (cxm-22 50V version) and see what happens [FONT=&quot]��[/FONT]
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Should I buy the 133mm passive pin-fin heatsink for the cxm-22? Or would some other kind of heatsink be even better?


Since my room has a width of 60 cm, shoulder I then just place the cobs 15 cm apart? I place one at 15 cm, one at 30 cm, one at 45 cm, and one at 60 cm. I hope it makes sense.



Stuggy

 

Koondense

Well-known member

Veteran

• May 6, 2019

• #7

Place them in a square 25-30 cm apart from each other.

 

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stuggy123

New member

• May 6, 2019

• #8

Thanks



Should i make the room more square then.. like 58 x 60 cm.? (1.9 feet x 2 feet). I just meassured the room again, and it is a little bit smaller than I thought: 54 x 60 cm (1.77 feet x 2 feet)





I can still add some centimers if necessary (I have only built the frame). Do you think it would make a difference if i could make the smaller side a little bit bigger in order to make the room more square?


Stuggy