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When started this post I added also specifications. The reason I did that is because I wanted to saw them to the people who knows about heatsinks more than I do.we all know that the price is lower than other sellers.we don't have to stick with it any more. If anybody thinks this heatsinks are...

I'm doing a research nothing more nothing less. I don't know if it is a crap or not ...that's why I order bigger ones... Next week I'll tell you the results

@Greengenes707 what type of aluminum alloy is used for your heatsinks?

Today they send me the pl with 133mm diameter .

The Plc I have is a modular one for industrial automation I use it before in a huge tobacco rolling machine.you can can do what ever you want with that shit but is very expensive .

The known way.... 16 cxb at 1400 + 4 vero 29 v.1 90 w each from my old grow room all cobs I will dim them through a Plc(program logic controller )

i will give a try sure next week I will tell you the results

In Ac failure bye bye led's!!!! I don't even want to think about it ... So I think the 133mm should be ok...

That's why I told him to send me an invoice with 120mm diameter witch is rated for 60e it is a bit bigger than yours . What to do think ? Should I order bigger ? Summer is very hot here I will control the room temps with Ac of course ...

The price I wrote before is with shipping cost . Shipping from Ali is expensive but again is cheap . 106 dol heat sinks +130 dol shipping with Dahl express I know is big difference in price It's 14,75 $/pcs to my door . They can also make any customization (drilling tapping) etc... @Netherfly...

Hi guys I found a link from a led grow journal in riu https://www.alibaba.com/product-detail/LED-Pin-Fin-Heatsink-with-Diameter_60434341998.html?spm=a2700.7724838.0.0.G7L1ck Any advise ?is it worth ?235 dol with shiping for 16 pcs to cool down my 50watt cobs ? Specification Setting Information...

@welight how long we have to wait for 200w driver ?is it any way to provide us with 400w driver without buying the 8 cob kit?

Can I use this method with liquid fertilizers ? Or is suitable for dry ferts..?

bellow is a link of an article that I found... MIT find a way to recycle the heat of the common light bulbs into light!with this method can make an old light bulb 35 % more efficient !!!!!it Could be awesome if they make cods even more efficient with this method...

did make the order with china post or dhl /ups?should i told him to write the minimum order cost to the package to avoid taxes?or kingbrite do it by themselves?

In my diy system I will use 1 driver per 3 cobs the driver that will use is meanweal hlg 185 h with this driver I will power 60 w each( this cobs the nominal wattage is 80 w but with 60 w each it will last longer with lower temps) or you can use the meanwell LPF 90d 42 with one driver per cob...

you are right i wont use passive cooling... for each led i will use arctic cooling cpu heatsink (very good and efficient way)and a good thermal paste . there are a big variety of drivers...you can buy china cheapos for 25-30 $ each but you don't know when this psu will goes off...or you can buy...

It is a diy led light with 18 cobs vero 29 3000k and I will power them with 60 w each With total 1080w.this is not my first grow it is my third time know I make an upgrade 800 w more

i'm talkinng about true 1000w of led light... i 'm not experience with auto seeds i'm growing photoperiod only but know i need something faster.....with good yields... thanks for the reply!!! c99 is not an auto strain right?

i was looking at en.seedfinder.eu this strain.... Sex feminised Lineage Critical Bilbo Auto x Jack Herer Auto Grow method indoor/outdoor Flowering time indoors 45-48 days Flowering time outdoors automatic (45-50 days) Yield 450-500 g/m2 indoor!!!!!!. is it something wrong with that report...