Matching Drivers and COBs

Bigdaddy212

Bigdaddy212

Well-Known Member
Airwalker16 said:
It's actually not pushing the limit. It can hold 6.6-6.8 cobs. Almost 7 but not quite.
Pushing it is my set up.
4 3590's on a 240-1750b x 2. It holds 3.9, but with the fV being lower at less than 2800ma that Cree says it's actually 36v's, I run it nice and tight. Probably the closest set up you can do with these cobs I think to fitting exactly what the driver can handle on it.
Click to expand...

so how many watts are you pulling with this setup? I'm so confused
 
Bigdaddy212

Bigdaddy212

Well-Known Member
Vegaswinner say the stretch was big with the far reds don't know yet about gaining any speed of flowering that's why I ask
 
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calvin kodi

Member
Hey guys. Thanks supraspl for all of the information that you have blessed us with so far.

I have my question posted in another thread. I believe the question is more suited for this thread. I am planning to run 4 vero 29 4000k cobs with a meanwell driver. I have my choices narrowed down to 2 or 3 but I don't know which one to choose but the important question is why that driver.
Hlg 240h c1050b , hlg 240h c1400b , and hlg 240h c1750b.

I know the first set of numbers is the watts that is used but what does the 2nd set of numbers mean? I know that c stands for constant current and the b means dimmable. Can you please point me in the right direction. I will be using a 42" 5.888" heatsink with 4 cobs along with the correct driver that I need. Probably a 140mm fan to help cool the heatsinks as well. What driver should I do for it?
 
Airwalker16

Airwalker16

Well-Known Member
calvin kodi said:
Hey guys. Thanks supraspl for all of the information that you have blessed us with so far.

I have my question posted in another thread. I believe the question is more suited for this thread. I am planning to run 4 vero 29 4000k cobs with a meanwell driver. I have my choices narrowed down to 2 or 3 but I don't know which one to choose but the important question is why that driver.
Hlg 240h c1050b , hlg 240h c1400b , and hlg 240h c1750b.

I know the first set of numbers is the watts that is used but what does the 2nd set of numbers mean? I know that c stands for constant current and the b means dimmable. Can you please point me in the right direction. I will be using a 42" 5.888" heatsink with 4 cobs along with the correct driver that I need. Probably a 140mm fan to help cool the heatsinks as well. What driver should I do for it?
Click to expand...
Second numbers is the aamperage
 
Airwalker16

Airwalker16

Well-Known Member
calvin kodi said:
How do i calculate the driver's amperage to match the cobs? I'm sorry for such a noob question but i would like to learn, "for a dummy".
Click to expand...
Forward voltage which is 36volts x amperage = watts.

36x 1.050 (1050)= 36 watts.
36x 2.100 (2100)= 73-74 watts.
36x 1.750 (1750)= 64watts.
 
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calvin kodi

Member
Airwalker16 said:
Forward voltage which is 36volts x amperage = watts.

36x 1.050 (1050)= 36 watts.
36x 2.100 (2100)= 73-74 watts.
36x 1.750 (1750)= 64watts.
Click to expand...
Airwalker, can you check this out and see if i'm on the right path.
vero 29 4000k cob - max current: 4.2a (4200) Vf: 36.8v

Matching to driver (example)
hlg 320h c2100b has output of 156v
4 vero 29 cob : 36.8v * 4 =147.2v
does that mean the cobs will fit on the driver because the driver provides 156v but the 4 cob only requires 147.2v?


Does this mean that if the cob's max current is at 4.2a it'll have 100w of light?
Does this math mean that if vero 29 cob running at the amperage down below will have that watt out of the cob?
Example:
36.8v (cob) * 1.050 = 38.64w
36.8v (cob) * 2.100 = 77.28w
36.8v (cob) * 1.750 = 64.4w
36.8v (cob) * 1.400 = 51.52w

so whats the difference between hlg 240h c2100b and hlg 320h c2100b? does this mean the driver 240 h will consume 240w from the wall and 320h will consume 320w total but depending how many cobs i have on the driver?
 
JorgeGonzales

JorgeGonzales

Well-Known Member
calvin kodi said:
Airwalker, can you check this out and see if i'm on the right path.
vero 29 4000k cob - max current: 4.2a (4200) Vf: 36.8v

Matching to driver (example)
hlg 320h c2100b has output of 156v
4 vero 29 cob : 36.8v * 4 =147.2v
does that mean the cobs will fit on the driver because the driver provides 156v but the 4 cob only requires 147.2v?


Does this mean that if the cob's max current is at 4.2a it'll have 100w of light?
Does this math mean that if vero 29 cob running at the amperage down below will have that watt out of the cob?
Example:
36.8v (cob) * 1.050 = 38.64w
36.8v (cob) * 2.100 = 77.28w
36.8v (cob) * 1.750 = 64.4w
36.8v (cob) * 1.400 = 51.52w

so whats the difference between hlg 240h c2100b and hlg 320h c2100b? does this mean the driver 240 h will consume 240w from the wall and 320h will consume 320w total but depending how many cobs i have on the driver?
Click to expand...
Ok, let's slow it down a second here. How big of an area is this for? That will tell you approximately what kind of light output you need, which will let you choose a current to run at, and finally you can fret over drivers when all of that is sorted.
 
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calvin kodi

Member
JorgeGonzales said:
Ok, let's slow it down a second here. How big of an area is this for? That will tell you approximately what kind of light output you need, which will let you choose a current to run at, and finally you can fret over drivers when all of that is sorted.
Click to expand...
I will be making multiple panels. I have a 10x10 grow tent. I don't plan on using all of its space but i am planning to diy 8 panels total or more if needed. I want to sort out what i need for each panel for the cleanest install but yet easy to adjust the height as in i don't mind adjusting 8 separate panels but rather avoid adjusting 1 huge panel if that makes any sense.
 
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