Vegetation Tent (2'x2'x4') Lighting + Ventilation Setup. Need help!

U

unbindmoney

Active Member
Hey guys,
I'm looking to make a vegetation tent separate from a flowering tent (already have figured out the setup). I was wondering what kind of lighting setup I should go with. I heard the MarsHydros and ViparSpectra pre-made LEDs work well with vegetation, but I just wanted to build my own COB setup. If anyone can just tell me the ideal True Watt range, COB efficiency %, Kelvin temp. for COB etc. I can just figure it for myself at that point :D

My Flowering Tent Set-up (4'x4'x7' Grow Tent)
CXB3590 36V 3500K (x15)
HLG 240h-1400b (x3)
HUSA Passive Heatsink 5.886" x 46" (x3) with 2 140mm fans on top of each Heatsink

One Driver will run 5 COBs on 1 Heatsink. The Driver will run at 75% which will generate 1050 mA and can be dimmed up to 100% which would be 1400 mA. ~567 Power Watts from Wall, 61.5% COB efficiency @ 1050 mA

I plan to grow 4-6 full grown plants in these, with a SCRoG set-up.

Also for the 2'x2'x4' Vegetation Tent, would a 4" inline fan be enough? Would I even need a carbon filter for it?

Any help is appreciated, thanks guys!
 
Trippyness

Trippyness

Well-Known Member
unbindmoney said:
Hey guys,
I'm looking to make a vegetation tent separate from a flowering tent (already have figured out the setup). I was wondering what kind of lighting setup I should go with. I heard the MarsHydros and ViparSpectra pre-made LEDs work well with vegetation, but I just wanted to build my own COB setup. If anyone can just tell me the ideal True Watt range, COB efficiency %, Kelvin temp. for COB etc. I can just figure it for myself at that point :D

My Flowering Tent Set-up (4'x4'x7' Grow Tent)
CXB3590 36V 3500K (x15)
HLG 240h-1400b (x3)
HUSA Passive Heatsink 5.886" x 46" (x3) with 2 140mm fans on top of each Heatsink

One Driver will run 5 COBs on 1 Heatsink. The Driver will run at 75% which will generate 1050 mA and can be dimmed up to 100% which would be 1400 mA. ~567 Power Watts from Wall, 61.5% COB efficiency @ 1050 mA

I plan to grow 4-6 full grown plants in these, with a SCRoG set-up.

Also for the 2'x2'x4' Vegetation Tent, would a 4" inline fan be enough? Would I even need a carbon filter for it?

Any help is appreciated, thanks guys!
Click to expand...
Checkout the COB Calculator so you can help yourself in the future with PPFD etc.
https://drive.google.com/file/d/0B2OrUhwDhXfjRHkzSHhaZ0pPX2M/view

As for wattage I go with half of flower for a small veg tent. Around 25w a SQ/f however you can run 50w a sqf.
( CXB 3590 3500k CD)

Ideal is all based on your budget.

I run a 2 x 2 x 4 as well and will be running 100W of COB. ( 2 COBS)

1.4A which is about 620PPFD and 50 PAR Was with around 12.5 PAR/w a SQ/f. More than enough for Vegging plants.

Hope that helps :)

Trippy
 
U

unbindmoney

Active Member
Trippyness said:
Checkout the COB Calculator so you can help yourself in the future with PPFD etc.
https://drive.google.com/file/d/0B2OrUhwDhXfjRHkzSHhaZ0pPX2M/view

As for wattage I go with half of flower for a small veg tent. Around 25w a SQ/f however you can run 50w a sqf.
( CXB 3590 3500k CD)

Ideal is all based on your budget.

I run a 2 x 2 x 4 as well and will be running 100W of COB. ( 2 COBS)

1.4A which is about 620PPFD and 50 PAR Was with around 12.5 PAR/w a SQ/f. More than enough for Vegging plants.

Hope that helps :)

Trippy
Click to expand...
Thanks mate, yeah definitely helped set some ground for me to build on.
 
Trippyness

Trippyness

Well-Known Member
unbindmoney said:
Thanks mate, yeah definitely helped set some ground for me to build on.
Click to expand...
Also, just a minor thing. I think you mean active heatsinks. HUSA are all Active meaning need fans.
Passive means no fans. Having fans or any air pass over is always better than none.

Welcome mate.
May I ask why you choose the CXB over Vero 29 or Citi?
Some new information has come to light that CXB may not be as efficient as advertised due to new Sphere data.
We will know more soon.
I personally prefer the Vero or Citi. WOuld not even concider CXB at twice the price of vero for me in Canada and many times the Citi CLU series.
 
U

unbindmoney

Active Member
Trippyness said:
Also, just a minor thing. I think you mean active heatsinks. HUSA are all Active meaning need fans.
Passive means no fans. Having fans or any air pass over is always better than none.

Welcome mate.
May I ask why you choose the CXB over Vero 29 or Citi?
Some new information has come to light that CXB may not be as efficient as advertised due to new Sphere data.
We will know more soon.
I personally prefer the Vero or Citi. WOuld not even concider CXB at twice the price of vero for me in Canada and many times the Citi CLU series.
Click to expand...
If what you say is true I might need to hold off on ordering. I basically have been doing calculations on bggrass' sig (calculator) and for the COB efficiency, nothing seemed to beat CXBs, but then again I only compared them to Citi 1212s, I might need to look into more of them.
 
Trippyness

Trippyness

Well-Known Member
unbindmoney said:
If what you say is true I might need to hold off on ordering. I basically have been doing calculations on bggrass' sig (calculator) and for the COB efficiency, nothing seemed to beat CXBs, but then again I only compared them to Citi 1212s, I might need to look into more of them.
Click to expand...
In my opinion they are not worth it.
I have calculated electricity and its just not worth the price.
I can run a small bit more wattage with vero 29 Gen 7 and get over 900PPFD which is ideal for half price.
Will take me many years to recoup the cost. PPFD will be in the same range so will get the same yield, just a small bit more wattage. Not even negligible on a bill unless running a huge garden.

I run 6 Vero 29 at 2.1A in a 3 x 3 getting around 966 PPFD with 505 total watts including driver.

Its your money but some rescent phere data is showing they are much lower than stated.
We will see some more when the thread gets updated.
I suggest looking into Vero for sure or Citi.
All up to you but the electricity savings are not worth it unless you live where its high like EU.
Also try to order from in your country or youll get hit with some serious duty. I got hit with almost 300 for a 1k order last week..
BS.
Anyways, do your own research and buy what you think is best :)
 
HalfBee

HalfBee

Well-Known Member
You don't need big cobs in a 2x2... consider 6 1212s at 1A - a very simple setup
low heat per cob so either passive (120s) or active (cheapest avail)

The PPFD and lumens are in same ballpark as running 4 3590s at 1.4 but so much less
spend that on ventilation/cooling instead. Can't wait to see what you choose...

Citizen.1212C4.3000K 6 COBS @1.05A ON 4.85 PROFILE HEATSINK
4 SQ.FT. CANOPY 90% EFFICIENT DRIVER @10 CENTS PER KWH
Total power watts at the wall: 245.56
Cobs power watts: 221
Total voltage forward: 210
Total lumens: 34255
Total PAR watts assuming 10% loss: 94
Total PPF: 456.84
PPFD based on canopy area: 1229.35
PAR watts per sq.ft.: 23.5
Cob efficiency: 47.09%
Power watts per sq.ft.: 55.25
Voltage forward per cob: 35.0
Lumens per watt: 155.0
Heatsink riser thickness / number of fins / fin's length: 0.14in/16/0.66in
Heatsink area per inch: 200.6 cm^2
Total heat watts: 117 • 19.5 watts per cob
umol/s/W / CRI: 4.86 / 80CRI
Heatsink length passive cooling @120cm^2/heatwatt: 70 inches
Heatsink length active cooling @40cm^2/heatwatt: 23 inches
COB cost dollar per PAR watt: $0.8
Electric cost @12/12 in 30 days: $9.34
Electric cost @18/6 in 30 days: $13.76
Cost per cob: $12.55
Heatsink cost per inch cut: $0.98
Total cobs cost: $75
Total heatsink passive cooling cost: $69
Total heatsink active cooling cost: $22

-------------------------------------------

CXB3590CD36V3500K 4 COBS @1.4A ON 4.85 PROFILE HEATSINK
4 SQ.FT. CANOPY 90% EFFICIENT DRIVER @10 CENTS PER KWH
Total power watts at the wall: 216.67
Cobs power watts: 195
Total voltage forward: 140
Total lumens: 35595
Total PAR watts assuming 10% loss: 99
Total PPF: 460.35
PPFD based on canopy area: 1238.79
PAR watts per sq.ft.: 24.75
Cob efficiency: 56.34%
Power watts per sq.ft.: 48.75
Voltage forward per cob: 34.89
Lumens per watt: 182.54
Heatsink riser thickness / number of fins / fin's length: 0.14in/16/0.66in
Heatsink area per inch: 200.6 cm^2
Total heat watts: 85 • 22.25 watts per cob
umol/s/W / CRI: 4.65 / Estimated
Heatsink length passive cooling @120cm^2/heatwatt: 51 inches
Heatsink length active cooling @40cm^2/heatwatt: 17 inches
COB cost dollar per PAR watt: $1.92
Electric cost @12/12 in 30 days: $8.3
Electric cost @18/6 in 30 days: $12.2
Cost per cob: $47.62
Heatsink cost per inch cut: $0.98
Total cobs cost: $190
Total heatsink passive cooling cost: $50
Total heatsink active cooling cost: $16
 
U

unbindmoney

Active Member
Trippyness said:
Also, just a minor thing. I think you mean active heatsinks. HUSA are all Active meaning need fans.
Passive means no fans. Having fans or any air pass over is always better than none.
Click to expand...
I'm confused, I was made to believe that heatsinkusa.com Heatsinks were passive heatsinks.
 
Trippyness

Trippyness

Well-Known Member
unbindmoney said:
I'm confused, I was made to believe that heatsinkusa.com Heatsinks were passive heatsinks.
Click to expand...
No they are Active meaning need fans.
If you want to go passive get 120 or 140 Passives.
If you need a source just ask there are a few.
There are usually around $20 each.
Personally I would go with an Active setup regardless, but thats just me.
 
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