4 COB DIY Build

littlejacob

Well-Known Member
Bonjour
Yes I agree...you will NEED 1 140mm fan to cool it!
How thick is the base of your hs?
Can you let your hand on the hs or it is too hot to let it on it?
CU
 

littlejacob

Well-Known Member
Another thing...why you put the 2 hs so close from the other???
You have 2 hs and 2x 1x1.25ft so 1 hs over each 1x1.25ft would be better and will provide a better coverage and a nice canopy!
CU
 

Airwalker16

Well-Known Member
Bonjour
Yes I agree...you will NEED 1 140mm fan to cool it!
How thick is the base of your hs?
Can you let your hand on the hs or it is too hot to let it on it?
CU
140mm fan wouldn't even cover it. Those are 8" so a 200mm one is much more practical
 

Bachomp

Well-Known Member
I'm in a very small space and felt that shape would best suit it. Each COB is within 6-8" of each corner of the tent. I also figured when I expand I could just put them end to end for a larger spread and work on an improved design :D
 

Bachomp

Well-Known Member
Bonjour
Yes I agree...you will NEED 1 140mm fan to cool it!
How thick is the base of your hs?
Can you let your hand on the hs or it is too hot to let it on it?
CU
And the heat sink is hardly warm to the touch. My space is usually 77~F and I still will be adding another fan for the girls. I'm comfortable with the temperature, they seem to be enjoying it!
 

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Danielson999

Well-Known Member
I also figured when I expand I could just put them end to end for a larger spread and work on an improved design :D
Yeah, or just build another exactly like it and run them side x side. I'm doing the exact same thing. I like having 2 seperate fixtures too. I only need to run one dimmed down for vegging and it's not spread across the entire tent.
 

grouch

Well-Known Member
Are you going to mainline the random? I've had great success with that training technique when growing from seed.
 

Bachomp

Well-Known Member
Are you going to mainline the random? I've had great success with that training technique when growing from seed.
Yes I'm going to mainline her. I'm still decideding what to try with the Skywalker. Might veg it out into something cloneable and pop 4-5 clones in the tent in her place while I'm training random.
 

kmog33

Well-Known Member
Another thing...why you put the 2 hs so close from the other???
You have 2 hs and 2x 1x1.25ft so 1 hs over each 1x1.25ft would be better and will provide a better coverage and a nice canopy!
CU
It looks like for the tent space he's in it probably has a pretty decent footprint at the distance they're at. Should dissipate heat a little better further in than right at the edge of the sink yeah?


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