Tuanis
Well-Known Member
Do i know you from somewhere??? You sound very familiar.... Like i know u from another forum site u know!
4x4 Tent COB Frame Size
- Thread starter nunoob
- Start date
Perhaps, but my plants seem to be quite happy, and I am in a fairly sealed environment.
Dereek511
Member
I would suggest building a 12 or 13 COB fixture using 1400ma dimmable drivers with passive cooling in a 3x3 frame. I recommend the 1400B drivers since they are the lowest amperage that can be dimmed to off.
For 12 COBs go with 3 rows of 4 COBS evenly spaced. If you're up for the challenge, look at the Luminus CMX22 at cobkits They do a great job at 50w and are less than half the cost of the Cree chips. With 133mm pin heat sinks you'll never have a heat problem.
Just so you know I've put my money where my mouth is
here's my 16 COB fixture in a 5x5
So... i know this is older, but we'll see.
I plan on doing passive cxm22s on 1400b, 4 per bar, and adding more bars in the future.
It may be sloppy, but i was wondering if the cobs would be too close on a 42" bar.
I appreciate the input (=
My tent seems just less than 5ft
For 12 COBs go with 3 rows of 4 COBS evenly spaced. If you're up for the challenge, look at the Luminus CMX22 at cobkits They do a great job at 50w and are less than half the cost of the Cree chips. With 133mm pin heat sinks you'll never have a heat problem.
Just so you know I've put my money where my mouth is
here's my 16 COB fixture in a 5x5So... i know this is older, but we'll see.
I plan on doing passive cxm22s on 1400b, 4 per bar, and adding more bars in the future.
It may be sloppy, but i was wondering if the cobs would be too close on a 42" bar.
I appreciate the input (=
My tent seems just less than 5ft
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420Barista
Well-Known Member
ok so ya got a tent that seems a bit less than 60 inches wide and ya want to run 4 cobs wide per 42 inch bar
from what i've learned on cob's and their spacing ya want them 1 foot from another and
on a 42 inch bar looking at your numbers it looks fine. 5.236inch heatsinks spaced 6.67inches from heatsink end to end looks good to me
how many rows deep are you going to run?
from what i've learned on cob's and their spacing ya want them 1 foot from another and
on a 42 inch bar looking at your numbers it looks fine. 5.236inch heatsinks spaced 6.67inches from heatsink end to end looks good to me
how many rows deep are you going to run?
Dereek511
Member
Atm I've got 2 900w vitraspectra led boxes, and eventually i plan on replacing those with these bars. Ideally i plan on have 3 or 4 of them.
Sickomindo
Well-Known Member
This is exactly what I got I bought. To anyone interested:
This is exactly what I bought off of Timbergrowlights too and got the 300 W kit with six cobs and put together the frame myself (trust me use a wire brush and it will look amazing unpainted) and painted green. Its a 300w 6cob setup kit 3500k. Go with a heavier gauge metal for aluminum L angle if you put it together yourself. Learn and I recommend using a rivet thing. so much easier and faster honestly put in the frame together was quick.
Then added a 260 W quantum board to it. Can't say anything as far as harvesting or yields this is my first real run with it currently.
Right now I'm in week 4 but for 10 days of that was seedling stage. Love Hempy.
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Dereek511
Member
Sweet set up you've got there. You recommend wire brushing the whole frame? Aluminum angle 1/8?
Sickomindo
Well-Known Member
yes and yes. if you decide to keep it original color, then def brush it. I got my QB in the frame better and higher in the frame now then it looks in this one pic. I had to kind of temp it cause I was already running these girls when the order came and I didnt want to do anything perm to it yet so I just zip tied it in till this run is over. as long as its safe.
The spacing provided above was good. What I would personally do is make it into 2 frames with 6 LEDs (2x3) 48" long. Use a section of angle aluminum to space 2 rows of 3 LEDs 12" wide (your total frame width may vary based on size of heat sinks). My reasoning is you can remove one frame during veg and adjust the height of each side independently. Storage and working with it is much easier as well.. Also since the length is 48" you can drill a few holes spaced differently and upgrade to a 5x5 if you wish. Just cut some new angle iron for the widths and swap them out.
This is exactly what I did for my 5x5 cob setup of 12. If I want to use them for veg in a 4x4 tent that is an option with a few adjustmentst. I can also use the same drivers and make it a 16 cob setup with better efficiency and coverage.
Here is a picture of one of the frames i built. I have another identical frame for full coverage in the 5x5 for when my plants are out of veg. I will just push this one in further to make room.
One last suggestion. Buy a cheap amazon lux meter. After the cost of the cobs this is around $20 and short money. I understand a par meter is better but the lux meter serves the purpose of testing light distribution by raising the height vs dimming. Otherwise you will just be guessing until you have experience with your new rig.
.
This is exactly what I did for my 5x5 cob setup of 12. If I want to use them for veg in a 4x4 tent that is an option with a few adjustmentst. I can also use the same drivers and make it a 16 cob setup with better efficiency and coverage.
Here is a picture of one of the frames i built. I have another identical frame for full coverage in the 5x5 for when my plants are out of veg. I will just push this one in further to make room
.One last suggestion. Buy a cheap amazon lux meter. After the cost of the cobs this is around $20 and short money. I understand a par meter is better but the lux meter serves the purpose of testing light distribution by raising the height vs dimming. Otherwise you will just be guessing until you have experience with your new rig.
.
bigdaddycannabis
Member
how many drivers would you use on a 4x4?No. It won't.
Traditional lighting standards say 600w HID for veg and 1000w HPS for flower in 4x4 tent. After you take LED efficiency and directed photons into account you can get away with less that those wattages for your lights, but not that much.
Orca is nice stuff, but the reflectivity of the walls won't give you much relief from producing the micro moles you need for a great grow.
Timber makes a nice product, but there are more cost effective ways for you to light your tent if you're willing to do some work. I would suggest building a 12 or 13 COB fixture using 1400ma dimmable drivers with passive cooling in a 3x3 frame. I recommend the 1400B drivers since they are the lowest amperage that can be dimmed to off.
For 12 COBs go with 3 rows of 4 COBS evenly spaced.
For 13 COBS go with 3 2 3 2 3
Cree CXB 3590s have been the go to COB for a while but technology has moved on. If you're up for the challenge, look at the Luminus CMX22 at cobkits. They do a great job at 50w and are less than half the cost of the Cree chips. With 133mm pin heat sinks you'll never have a heat problem.
If you're up for the challenge, here's a search link to start with featuring Growmau5 posts and videos
Just so you know I've put my money where my mouth is
Hey man thanks for your kind words. My problem right now is, i gotta make it work like this because of budget but maybe later i will upgrade and do the whole 12 cobs, for now this will have to do. I wish i could make it bigger and slicker but yeah man, money is a problem right now...
bigdaddycannabis
Member
What if you only used
How many cobs do you run on a 320 and do you dim down ? Thanks for the reply
bigdaddycannabis
Member
D
Nice, how are your yields ? Seems like a great setup. I am wanting to build a 4x4 cob setup and am getting ready to pull the trigger. Have you used luminus cobs before ?
bigdaddycannabis
Member
Oz's, Lb's, Kg's?
bigdaddycannabis
Member
Thanks for taking the time to reply to a COB newbie. Do you have any heat issues running 16 COBS at full blast in a 4x4 ? I was thinking of Running 600W of lighting, but your setup has me second guessing myself