Vero cooling

Halfandhalf

Halfandhalf

Well-Known Member
So I have these iceled xtra ultra heatsink fan combo for my Vero 29 [email protected] (3 total 210 watts) and it's putting out a lot of downward heat while the heatsink is completely cool. Already made a thread about lowering fan speed because these are jet engines but what I'm really wondering about now is the star design of the heatsink. The middle doesn't completely cover the backplate of the cob meaning if I look through the fins from the top or side I can see some exposed areas where I put thermal grease. Now I'm not a cob expert but from working with cpus I'm pretty sure I would have had some fried cpus if I used this heatsink on them. Is this exposed area a problem for cobs? Anyone have experience with these or know a different choice for fan/heatsink combo of similar size?

Rather not replace these but if my cobs aren't supposed to be outputting this much downward heat I will. The heatsinks on cutter look similar size but without fan and says it's only for Cree, pretty sure I can drill it myself if I have to and at least the bottom seems like it would conduct heat better but I don't know if it's an improvement. Anyone care to share how much their builds put out in downward heat? At 16" above I go from 75f with my other lights on to 82-84f with 3/4 to full power cobs on. This is in a tent with good exhaust and intake although I don't have a fan on the plants and the rest of the tent outside of the direct line of the lights is quite cool.
 
That is heat from the light :)

It is all fine. Just make sure you have good air circulation at the canopy.

To put you at ease, I am running 6 Vero 29 SE 3000k Cs on a 8"x12" 1/8 aluminum plate and only using 3 90mm fans for active cooling. Case temps are 5c above ambient and Tj measured using IR meter is 47c when running the cobs at 700ma. Putting your hand under it at around 8" and it's pretty warm on the skin just from the light.
 
Hmm. Guess I won't run out and panic replace them then. But this kinda reinforces my wanting a taller tent. Mine is 32"x32"x63" and the carbon filter takes up a good 12" at the top. Or maybe a fan is enough for now. Thanks for the reassurance. Edit:: Honestly I still have the inkling that these heatsinks suck. I don't understand how having an area that isn't in contact with a flat metal would dissipate heat well.

Also hold up you're just using a flat aluminum plate with fans and no fins and you're only 5c above ambient? I have tall fins on mine that I would think should do a better job but its about equal to yours.
 
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Consider going with a 19" lasco box fan from one of the hardware stores. At speed 1 they use about 54w and move a lot of air so you can kill two birds with one stone by having one blow downward from the top. They will passively cool your lights, area and generate good circulation.
 
i cant say enough about the air king clip-on fans sold at hydrostores and Grainger

tuff stuff
 
Halfandhalf said:
So I have these iceled xtra ultra heatsink fan combo for my Vero 29 [email protected] (3 total 210 watts) and it's putting out a lot of downward heat while the heatsink is completely cool. Already made a thread about lowering fan speed because these are jet engines but what I'm really wondering about now is the star design of the heatsink. The middle doesn't completely cover the backplate of the cob meaning if I look through the fins from the top or side I can see some exposed areas where I put thermal grease. Now I'm not a cob expert but from working with cpus I'm pretty sure I would have had some fried cpus if I used this heatsink on them. Is this exposed area a problem for cobs? Anyone have experience with these or know a different choice for fan/heatsink combo of similar size?

Rather not replace these but if my cobs aren't supposed to be outputting this much downward heat I will. The heatsinks on cutter look similar size but without fan and says it's only for Cree, pretty sure I can drill it myself if I have to and at least the bottom seems like it would conduct heat better but I don't know if it's an improvement. Anyone care to share how much their builds put out in downward heat? At 16" above I go from 75f with my other lights on to 82-84f with 3/4 to full power cobs on. This is in a tent with good exhaust and intake although I don't have a fan on the plants and the rest of the tent outside of the direct line of the lights is quite cool.
Click to expand...
The 140mm heatsinks we have are predrilled and tapped for
CXB30xx
CXB35xx
Vero18
vero29
all Zhaga compliant holders
Cheers
Mark
 
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