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But cobkits confirmed that his heatsink can do 100w? But then another guy said it doesn't run 70W so I'm baffled lol

I can't put a fan directly on the heat sink due to mounting them back to back

I'm designing a custom vertical system with the heat sinks pin to pin with leds going left and right with plants all the way around them... I'm thinking of mounting 10 55w axial fans at the bottom blowing up through all the pins

That 152 by 80mm heat sink alibaba selling me drilled and tapped for 9.5 usd each. And I need 80 of them

The guy above said he uses that and his heatsink is running hot. Do you really think that heatsink will run 100w cob efficient?

No I'm based in Europe so cobkits prices are really too high for me. I'm buying from alibaba

Holy crap so the 150 is way to small for the 100w then... good job I double checked I was wanting it to run at like 30c for efficiency

I can put fans blowing down from Above across all the pins ? Would have to be 20 inch box fans though If these heat sinks cover 100w tho do I need a fan then?

I plan on mounting two heat sinks back to back vertically for a vertical grow not sure I'd be able to put fans anywhere

I could get larger heat sinks if needed 220mm by 100mm? Cost is more though and it's extra wieght so if I don't need them I will avoid But if I can cool passively then would be great

I need 80 heat sinks fans would be a killer in extra watts Where he says 17 inch he's talking about heatsink USA profiles. Are they different?

Bump anyone got any idea?

He's doing the drilling for me on the diagram it shows the holes I asked for. I am just confused how it is good for 100w? Growmau5 video states u need 17 inch2 per heat watt?

Really? Did I work out surface area wrong?

The guy on alibaba is saying these heat sinks will dissipate 100w of LED... which seems far fetched? If I worked it out correctly each pin has 1138 square mm. 181 pins = 200,000 ish square mm Which is only 310 ish sq inches? That's massively too small isn't it? I believe I read 17 square inch...

I'm about to order heat sinks for my LEDS. I think I have everything correct but I could use some help if someone doesn't mind double checking that this heat sink will be enough for 100W of led to run cool. I plan to run 4 citizen CLU 048 1212 per heat sink. I believe they are 28mm wide and...

I already have a system going where I get 40 oz a harvest on a regular basis. These are just scrap so it isn't about not putting effort in. I could go buy red bulbs but I'm more interested in knowing if cannabis actually requires red lights to start flowering. As there is definitely a reason...

I already have 8000w of cobs ready to go in my other room so putting money into it isn't the issue. I don't have just one t5ho it's a 650w 8 bulb fixture. 6oz was a random number. Its just a daft few clones I had spare. I was saying I don't care what I get out if it. Its free bud rather than...

Don't plan on buying any new bulbs as I'm replacing everything with cobs soon. Don't see why I would need to change bulb to initiate flower?

Yeah I agree they aren't ideal however they were just spare clones I would of thought yield would be less however I'd be happy with 6 oz from 15 clones as it's basically free bud. Didn't expect flowering to take longer due to it though?