CXA/CXB 3070 build

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splift124

Well-Known Member
My cab is 24"Wx13"Lx37"H 2.2 sqft with the pot being 12.5"Hx11.5"D which gives me about 24.5" in vertical growth space with the light being kept 12" away from seed to harvest.
I plan on running 1xCXA3070 AD E1 6500k run @ 1mA 36w
1xCXA3070 AD F1 5000k run @ 700mA 24w
3xCXB3070 AD 30G 3000k run @ 1.4mA 49w 147w total
that gives me a total of 207w with 94w per sqft.
I would run the 6500k 36w, 16w per sqft for seed, then switch on the 5000k 24w and a 3000k 49w for 109w, 49w per sqft for veg and switch on the last 2 3000k 98w for a total of 207w, 94w per sqft. for flower.
I'm only planning on growing 1 plant strain yet to be determined. I'm looking to provide the most amount of light for this space without bleaching or other issues with too much intensity.
 
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splift124

Well-Known Member
I plan on mainlining for 8 tops and then switch to flower as soon as it recovers and gets a little beefy. I have plenty of pc fans for ventilation and circulation so heat won't be much of an issue.
 
Airwalker16

Airwalker16

Well-Known Member
splift124 said:
I plan on mainlining for 8 tops and then switch to flower as soon as it recovers and gets a little beefy. I have plenty of pc fans for ventilation and circulation so heat won't be much of an issue.
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There's plenty of reasons for fans. But the leds alone wont have any heat issues really...
 
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grouch

Well-Known Member
I run a similar size cab with dimensions 20w x 11d x 29h with 2 cxa3070 3000k. I am getting bleaching issues when running much over 40w per cob. Are your drivers dimmable? You might end up with too much light (strain dependent)
 
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splift124

Well-Known Member
grouch said:
I run a similar size cab with dimensions 20w x 11d x 29h with 2 cxa3070 3000k. I am getting bleaching issues when running much over 40w per cob. Are your drivers dimmable? You might end up with too much light (strain dependent)
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How far is your light from the plant? Thanks for your input, I was looking for a thread with a similar setup but didn't have luck.
No the drivers are not dimmable but I haven't bought anything yet.
 
Airwalker16

Airwalker16

Well-Known Member
splift124 said:
How far is your light from the plant? Thanks for your input, I was looking for a thread with a similar setup but didn't have luck.
No the drivers are not dimmable but I haven't bought anything yet.
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Buy "B" versions if you're going with meanwells for dimming. That way you will save yourself a ton of headache.
 
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splift124

Well-Known Member
I'm going with meanwell for drivers, going to do one per cob for easy changing and incase one fails for whatever reason I'll have the other cobs running.
 
Airwalker16

Airwalker16

Well-Known Member
splift124 said:
I'm going with meanwell for drivers, going to do one per cob for easy changing and incase one fails for whatever reason I'll have the other cobs running.
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Dude, if that's your plan, just buy 1 and run them in parralel. Just run them very soft so if one does go haywire (unlikely) your others can take the extra current without hurting anything. So pointless to spend that money on a driver FOR EACH COB.
And on top of that, buying drivers that can only power 1 cob each, really doesn't leave you any room. ..like at all... for any improvements or switching out. Very limiting
 
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splift124

Well-Known Member
Airwalker16 said:
Dude, if that's your plan, just buy 1 and run them in parralel. Just run them very soft so if one does go haywire (unlikely) your others can take the extra current without hurting anything. So pointless to spend that money on a driver FOR EACH COB.
And on top of that, buying drivers that can only power 1 cob each, really doesn't leave you any room. ..like at all... for any improvements or switching out. Very limiting
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I understand your point and it would be nice to save a little bit but my idea is to run certain COBs at different mA. I will also be installing switchs to easily flip on the COBs for different stages of growth so I figured it be easier to wire it that way.
 
Airwalker16

Airwalker16

Well-Known Member
splift124 said:
I understand your point and it would be nice to save a little bit but my idea is to run certain COBs at different mA. I will also be installing switchs to easily flip on the COBs for different stages of growth so I figured it be easier to wire it that way.
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Ok. It'll be kinda difficult to run 1 cob at 1400mas on a single constant current driver though. They usually need 2 @ least.
 
Airwalker16

Airwalker16

Well-Known Member
splift124 said:
I wasn't aware of that, I was going to use a meanwell LPC-60-1400 and figured that would do the job
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OH I see. You're gonna use the lpc series. Ya those are dirt cheap @ 10-20 bucks. You could use lpc 100-1400 series too. It starts at exactly 36v and ends at 72. Right on the money for 1 or 2 cxbs.
 
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