Please Help - Cheap Diy Cob Build For Small Grow (3x2ft)

[Northernpop]

Hi guys,

Please could someone give me a link, or post to a cheap diy cob build for a small grow (2x3ft)? I currently grow four females in scrog under a fairly crappy 1000w LED from China that has a fan that's too noisy for me. The light distribution is also limited to the centre of the grow. I'm a poor gardener, but I've got a soldering iron, and I'm keen to learn !!

Peace out !!

 

[madgrower]

Hi guys,

Please could someone give me a link, or post to a cheap diy cob build for a small grow (2x3ft)? I currently grow four females in scrog under a fairly crappy 1000w LED from China that has a fan that's too noisy for me. The light distribution is also limited to the centre of the grow. I'm a poor gardener, but I've got a soldering iron, and I'm keen to learn !!

Peace out !!

any ventilation

 

[Northernpop]

Yeah, rooms dialled in year round. Probs going hempy next grow.

Happy growing !!

 

[madgrower]

Yeah, rooms dialled in year round. Probs going hempy next grow.

Happy growing !!

i was growing 3 plants in a 3x2 with a 400 watt hps and faired out well for a few years now i have a bigger room and more plants under 1000s hps and kinda miss the simple 3x2 closet

 

[Northernpop]

What the minimum wattage/numbers of cob/s will I need for a decent grow (that's enough)? I'm in uk too.

Cheers.

 

[Toaster79]

You need about 35-50W/sqrft for flower, so 250W-300W unit with Cree, Bridgelux, Citizen or Lumiled Cob paired to a proper Meanwell driver should fit perfect. 100W 4000K-5000K highest CRI for veg + 150-200W of 2700K-3000K for flower and two separate drivers or 3000K-3500K of highest CRI for an all-rounder. You could also go quantum board way. 2 of them would fit nicely without a beefy heatsink. There are infinite options, those are just 2 of my ideas.

Read this and this.

Since you own a soldering iron I assume you know what this is: P=U×I

For ordering parts, Kingbrite (jerry meng) is a good place to get all the parts on a budget.

 

[Northernpop]

Cheers Toaster !!

I think it's Ohm's law, but I'll need to do plenty of reading up before I start proper. 250w would probably do it, or whatever fits best. I'd like it to be passive cooled though, if possible. I don't like fans.

Happy growing.

 

[Northernpop]

Hey guys, please be easy on me, but could these actually work in a 2x2.5' grow? The build would cost more me than this I think.

Peace out !!

 

[Islandgrows]

I would go with quantum boards . They run cool. No fans needed. On YouTube you can check the par tests.

 

[Northernpop]

Cheers islandgrows, I've just bought a soldering iron and reading up on diy cob builds too. Lol.

So would that floodlight system not work?

Any good links regarding quantum boards, or basics to know? I'll start reading up.

Happy growing!!

 

[Islandgrows]

Cheers islandgrows, I've just bought a soldering iron and reading up on diy cob builds too. Lol.

So would that floodlight system not work?

Any good links regarding quantum boards, or basics to know? I'll start reading up.

Happy growing!!

Horticulture lighting group is the company name can find it with a quick Google search. Or type in qb288 led

 

[MW7945]

Most COB kits don't require any soldering now... Vero's have everything built in. Plug and play type stuff.

Tbht that kit you posted looks like a turd pile. If you can get 4 cobs and run them @ 200w you should be good

 

[Northernpop]

Cheers guys, much appreciated!!

Peace out.

 

[Northernpop]

Horticulture lighting group is the company name can find it with a quick Google search. Or type in qb288 led

Ahh, I'm in the UK, Islandgrows. Nothing really on eBay for quantum boards. I'll have a good google.

 

[BombBP]

Get 4 of each of these-



https://cobkits.com/product/arctic-thermal-pads-for-citizen-clu048-series/

https://cobkits.com/product/ideal-holder-for-clu048/

https://cobkits.com/product/133mm-passive-pin-fin-heatsink-for-clu048cxm22vero-29/

One of these-

https://cobkits.com/product/meanwell-hlg-185h-c1400b-driver-constant-current/

Some of these-

http://cobkits.com/product/wago-222-series/

http://cobkits.com/product/182-wire/

http://cobkits.com/product/bourns-100k-potentiomenter/

Then you just need to build a frame and get a power cord and you're good.

 

[Northernpop]

Cheers Pal. I'm in U.K., but I've found them on eBay !!

 

[Northernpop]

Ok guys, and here's the thing.... Could I just buy four of these for my grow? They have no fans, and I don't have to build. Or am I missing something?

Peace out !!

 

[Toaster79]

Ok guys, and here's the thing.... Could I just buy four of these for my grow? They have no fans, and I don't have to build. Or am I missing something?

Peace out !!

I wouldn't bother with that chinese trash.

Try this: https://m.alibaba.com/product/60633...-top.html?spm=a2706.8291533.0.0.5b31f29hIbP5b

 

[brazel]

the difference between fan and no fan depends on your heatsink. What does a heatsink do? What's passive and active? Look at power supplies, learn about them. Learn about cobs. Learn spectrum. Learn what plants see and what we see. Someone can tell you this but to learn it, is the goal, cheers​

 

[Northernpop]

Cheers Brazel !! I agree, a little knowledge in the wrong hands is dangerous. I'll research and do everything within my power not to blow my house up.

I'm set on a good meanwell 1400 driver and citizen cob build (with soldering ). Do any Brits know of any good lighting suppliers?

Many thanks, and happy growing !!