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Sammy's Chinese COB-FEST

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sammyz2646

Member
I built this LED light today for a friend to veg some plants under

2 COB's both ~ 50 watts w/ a 10 watt ac fan
1 warm white
1 full spectrum
The fan is pulling heat from 1 and pushing away from the opposite heat sink. These active LED's are staying unbelievably cool. They will last for ions at these temps








 
X

xctbl

New member
This thread has inspired me to embark on a similar DIY project, I ordered 2 CXA3070 Z4s, one 5000k and one 3000k. They will be slapped onto PC heatsinks. I want to replace my 250W HPS because the extraction is just too noisy in my flat. My tent is just 2x2f (DR60), so maybe 2x 50W Cob + a few 800 lumen e27 warm white leds (and some fanless chinese 'growlights' advertised at 50w but 14w actual) might do the trick. At least the diy will be fun!
 
4

420ish

Active member
two of my drivers were doa.now i have to get the two i have built.i spent last night testing after finding out some parts were no good.i plan on putting these right next to my carbon filter with a 8 inch extraction fan.do you think that should be enough air movement for passive cooling?
 
PetFlora

PetFlora

Well-known member
ICMag Donor
Veteran
FYI I saw a chart yesterday showing cob heat distribution

4 methods of attaching to the heat sink were tested

The best by far was using a cob holder, which also makes replacing/upgrading cobs easy
 
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patientpat

Hello guys,
first off, please forgive me for asking an unrelated question to tread topic. I'm here to chase down 420ish for help if possible. I've read Tilts then entertainment center tread a few times after reading ineffectualizes high-pod thread and a few others. I've been reading on icmag for a few months and joined recently.

I've planned out a cab with vertical pl-l 55 watt in t12 tubes with ideas based on ineffectualizes work and I'm sure that Tilts first and especially second cab build is exactly what I could blue print on especially specific to his alterations and enhancements to the pl-l t12 cool tube venting.

However no matter what I've tried. I cannot find Tilts pictures of his work. Any help, guidance would be deeply appreciated. I'm a fair d.i.y.er and would run with this design if I could find some pictures or details of what he did. I could not make out much from the text without the pictures.

Again forgive the intrusion. I hope 420ish may have some input when he's the time.

I'll be running cindy99.
 
J

JointOperation

Active member
so why is it that no1 is making LEDS with these big ass ones ? lol.. no LED company making huge LEDS? or are these comparable to other leds.. do they work better or worse.. after seeing the size of them.. 50w? each led? or how does that work? if you were to make a 3x6 that covered a 4x 8. with these big mother fuckers.. 2500watts worth.. would it be worth it or whats the deal on these big guys?
 
4

420ish

Active member
patientpat said:
Hello guys,
first off, please forgive me for asking an unrelated question to tread topic. I'm here to chase down 420ish for help if possible. I've read Tilts then entertainment center tread a few times after reading ineffectualizes high-pod thread and a few others. I've been reading on icmag for a few months and joined recently.

I've planned out a cab with vertical pl-l 55 watt in t12 tubes with ideas based on ineffectualizes work and I'm sure that Tilts first and especially second cab build is exactly what I could blue print on especially specific to his alterations and enhancements to the pl-l t12 cool tube venting.

However no matter what I've tried. I cannot find Tilts pictures of his work. Any help, guidance would be deeply appreciated. I'm a fair d.i.y.er and would run with this design if I could find some pictures or details of what he did. I could not make out much from the text without the pictures.

Again forgive the intrusion. I hope 420ish may have some input when he's the time.

I'll be running cindy99.
Click to expand...

i do not have any pics of tilts cabinet or my pll cabinet.start a thread and i will try to explain anything you want.i would say after building my first 4 cob lights that it would be easier for you to do a cabinet with these .
 
PetFlora

PetFlora

Well-known member
ICMag Donor
Veteran
JointOperation said:
so why is it that no1 is making LEDS with these big ass ones ? lol.. no LED company making huge LEDS? or are these comparable to other leds.. do they work better or worse.. after seeing the size of them.. 50w? each led? or how does that work? if you were to make a 3x6 that covered a 4x 8. with these big mother fuckers.. 2500watts worth.. would it be worth it or whats the deal on these big guys?
Click to expand...

The DIY guys have been leading the way to better med LEDs for 3+ years now

Mostly small cabinet grows where a single 50w actual is fine

But when you start going for bigger foot print panel, the heat sink cost will add up FAST

I have seen pics of a bunch of single ~50w cobs hanging over a grow in a bigger tent. That, too, is expensive, but awesome

I suspect we will see a realistically priced version soon, but probably still expensive compared to more common fare but quality panels( which cost ~ 2.50/watt), which my be out of reach for most anyway
 
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patientpat

Thanks a lot for getting back to me 420ish.
Was unable to reply to visitor message as perhaps it's post number dependent. I will try show the idea I developed for my small space in a new tread by scanning in a drawing and look forward to any input. I'll try visitor message again if not allowed to post tread as opposed hijacking tread.

Suggestions and time spent giving them are very appreciated. I usually struggle by on little diy projects but this is a brand new endeavour for me. I know many things have to be done right to get the cab climate stable for growth and give a newbi a chance at a successful grow.
 
J

JointOperation

Active member
i was just wondering.. because id rather pay 1000-1500 for 50w leds then 5 watt..

id like to see this take off.. anything that helps the community im fine with.. its just i dont like how all these dudes jump on the LED bandwagon.. are putting out chinese made shit.. for prices like MARS 2 and shit.. those are all chinese u can get for half price on the net in china.. and if u buy enough they will put any LOGO u want on it lol..


basically.. i guess what im asking is.. do LEDS have what we WANT AND NEED.. or should most of us be upgrading to double ended bulbs for now.. and then 2-3 years. grab LEDS wen they are cheaper and more powerful?'

'
like are the 50w LEDS. a single bulb or a bunch in 1.. like this is the shit i dont understand lol.. i see 120w cob.. online for purchase 45 each. but its 60 3 watts running at 120.. so only at 2watts? i dont understand this shit lol.. i guess its time to get into RESEARCH MODE.
 
S

sammyz2646

Member
The bottom line is simple----


You must ask yourself--

What is your available space???

What is your goal with regards to plant size??/ yield??/ and overall strategy???

Are you planting 3 plants or 30????





If you live in an apartment with your mother and want to do a PC grow and privacy is key------then I suggest for numerous reasons to go with LED's

If you want to fill a small closet with a few smaller plants and get some personal herb, then maybe go with a more powerful LED


A PC tower grow???!!! :confused: :crazy:

I am amazed that this is even attempted

anyway. . . .


I have learned that with current LED tech, that a simple light rail (assuming you needed the coverage)--- using a 400/600/1000 watt HPS/MH--- would give you the best and cheapest results BY FAR!!!

Again, with the HPS comes some temperature challenges, etc

But don't be fooled, as these LED's (all LEDS) do create a fair amount of excess heat also

I have grown almost everything under the sun under multiple LED's both foreign and domestic----- and HID's------ and my deduction with current technology is ---

that your GOALS and your available SPACE---- dictates certain choices---- and smaller more private grows are perfect for LED's if done correctly

Anyone who cares about their flowers bursting with unbelievable size will never really get the results they seek with current LED technology---- unless they spend stupid amounts of cash up front ---and even then ---its not a HID.. yeah yeah , I see your flower pix, and they are lovely flowers for sure,lots of terpenes and resin, but not anything close to a HID bud---- especially with LED's as supplemental lighting, in addition to your HID's

I have incorporated multiple spectrums of numerous kinds of LED's and have found that using then as supplemental side lighting in a more sizable space and plant count is the key for this application and quantity

Dissapointing??? a bit, but they do still do a good job

HID's do a GREAT JOB---especially with LED's blaring in from the sides and corners.

Mylar is your BEST friend and if your growing cannabis without it or some similar reflective surface-------- your losing yield!
 
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S

sammyz2646

Member
I will admit. . . I had visions of a HID free---- flower room . . . nothing but LED's --I'm talking full coverage . .. but overall, to do what I really expect and to achieve those results , including yield,

I have surrendered to the HID and it's results. I simply use a hybrid lighting system at this point until LED's get cheaper---- and they can get better results in a larger scale space to justify the cost to cover that larger space. .
 
4

420ish

Active member
you have ran the cxa and the chinese cob.do you notice a difference?i have the four chinese cobs running above my vertical 600. it is a nice boost but no where near as bright at 2 600 watters running at 75 %.managing the heat is easier but i think 900 watts hps will kick 600 hps and 200 led watts.
 
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