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Cooling diy led..

What heatsinks shold i use

  • Total voters
    16
Diskokobaja

Diskokobaja

Well-Known Member
I wanna DIY my grow led with 4 3070cree cobs.. I will power them at 50w each.. My question is should i Use passive heat sink or should i use pc cooler heat sinkspc cooler.jpg ?? I have tgl60 and he has passive heatsink led-grow-light-tgl-star-60.jpg , it raises my tent temp by 3c..And in summer that is too much.. So should i use passive or active heat sinks?
 
Airwalker16

Airwalker16

Well-Known Member
Diskokobaja said:
I wanna DIY my grow led with 4 3070cree cobs.. I will power them at 50w each.. My question is should i Use passive heat sink or should i use pc cooler heat sinksView attachment 3791790 ?? I have tgl60 and he has passive heatsink View attachment 3791792 , it raises my tent temp by 3c..And in summer that is too much.. So should i use passive or active heat sinks?
Click to expand...
Active will always give you better cooling bro. And even more so, in a small setup. 4 cxb3590's on a 36"x5.886" heatsink at 64 watts is impossible passively. But I have 2 of em with 2 140mm fans on each and it's cool enough to drop my nutsack on.
 
V

VegasWinner

Well-Known Member
In a tent you need a lot more air flow to remove that extra heat created by the passive cooling. All that heat is in the tent and it can turn out badly without additional considerations for additional air removal to keep ambient heat levels down. Passive hot air has to go somewhere and in the same small space that can prove fatal. I recommend active cooling in a confined space with inline fan to create negative pressure air flow to keep temps down overall. In an open room you have much more air to contact and remove heat, it is a volume issue, which is why circulating fans are so much better in an open space, time for air to dissipate heat and recover. small space small volume, large space large volume. Too much heat you can saturate the air creating too low relative humidity drying out your plants and reversing transpiration, which is essential for healthy plant growth. peace
 
Diskokobaja

Diskokobaja

Well-Known Member
Thank you very much.. For me prima klima 125 is Only option, she suck in that tent like hoe drain your balls after BJ!!
 
S

Shugglet

Well-Known Member
I'm saying unless you plan on using some sort of cool tube, active and passive cooling will each dump the same amount of heat into your tent. Active simply gets the heat away from the lights faster. All of it is going into the tent regardless though.
 
welight

welight

Well-Known Member
yes heat is heat, whether fanned away or convected away. The benefit of passive is obviously less fan controller/wiring etc and with passive no concerns about fan failure, however if your driving big wattage then from a form factor perspective active hard to argue with
Cheers
Mark
 
Abiqua

Abiqua

Well-Known Member
I can only offer personal experiences...after running just about every active example [arctics, mechtronix, HSusa, Ebay, copper cpu coolers etc.] ...I am headed for the big passive light in the sky....

Welight put the best thought spin on it so far....frankly, I am tired of the wiring when passive is what I always wanted. Active was just easy to assemble especially 2 years ago, we all are damn luck these days....

I think passive will improve in cooling efficiency [maybe thru sheer bulk, but still] and so will chips....

Passive is simpler but heavier.
 
Evil-Mobo

Evil-Mobo

Well-Known Member
Abiqua said:
I can only offer personal experiences...after running just about every active example [arctics, mechtronix, HSusa, Ebay, copper cpu coolers etc.] ...I am headed for the big passive light in the sky....

Welight put the best thought spin on it so far....frankly, I am tired of the wiring when passive is what I always wanted. Active was just easy to assemble especially 2 years ago, we all are damn luck these days....

I think passive will improve in cooling efficiency [maybe thru sheer bulk, but still] and so will chips....

Passive is simpler but heavier.
Click to expand...
My passive DIY runs harder and cooler than the previous pre built light I had that was actively cooled. I can grab hold of the pin heat sinks and the driver with no issue of heat. and no noise! I will never not have a passive LED again lol..
 
G

grouch

Well-Known Member
Passive cooling helps keep the heat up at the top of the tent instead of stirring it around. In conjunction with a heat extraction fan placed at the top it could possibly be more efficient at removing the heat.
 
Evil-Mobo

Evil-Mobo

Well-Known Member
grouch said:
Passive cooling helps keep the heat up at the top of the tent instead of stirring it around. In conjunction with a heat extraction fan placed at the top it could possibly be more efficient at removing the heat.
Click to expand...
It has been thus far for me. My wife even came to the garden today. I showed her the tent with my DIY LED. The temp was reading 82 but it did not feel like that in there with the extraction and the circulating fans going. It's the best dialed in my 3x3 has ever been I am scared to change a thing even my humidity is in check with no dehu it's crazy the difference. And there's more light lol......
 
G

grouch

Well-Known Member
I personally mounted the heatsink fins outside my cabinet and the cobs inside through the ceiling. My drivers are mounted outside as well
 
Evil-Mobo

Evil-Mobo

Well-Known Member
grouch said:
I personally mounted the heatsink fins outside my cabinet and the cobs inside through the ceiling. My drivers are mounted outside as well
Click to expand...
I got everything inside and having no issues so not going to change it lol
 
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