Samsung F series Gen 3 amperage question

GentleCaveman · Jan 5, 2019

I got 4 Samsung F series gen3. 2' single row strips on the way. Two 3000k and two 3500k. I'm planning on building a fixture with 2 of them on each side and the single 3500k cree cxb3590 at the middle. That light is gonna be used in 2x2 tent from start to end.

My question is: Should I wire all 5 lights in series to my HLG-185h-c1400a driver and dim everything down if strips get too hot, Or am I better off parallel wiring the strips 2 by 2 to and run them @700mamps?

I'm not sure if I will be able to get good enough heatsinks for the strips. Any of you guys run them @1400mamp? Do they get really hot?

By the way I think I still got the option to change my driver with hlg-120h-c1050a if thats the better option.

Hugo Phurst · Jan 5, 2019

To me - That you have to ask means that you should find a pro to do it.

Argentocobs · Jan 5, 2019

GentleCaveman said:
I got 4 Samsung F series gen3. 2' single row strips on the way. Two 3000k and two 3500k. I'm planning on building a fixture with 2 of them on each side and the single 3500k cree cxb3590 at the middle. That light is gonna be used in 2x2 tent from start to end.

My question is: Should I wire all 5 lights in series to my HLG-185h-c1400a driver and dim everything down if strips get too hot, Or am I better off parallel wiring the strips 2 by 2 to and run them @700mamps?

I'm not sure if I will be able to get good enough heatsinks for the strips. Any of you guys run them @1400mamp? Do they get really hot?

By the way I think I still got the option to change my driver with hlg-120h-c1050a if thats the better option.

I run mine @1050 mA the draw 23.16 volt and 24 w per strip with 2.5 mm U channels .

whytewidow · Jan 5, 2019

At 1400mA they need to be on something, just to be safe. I run mine at 1667mA and they get pretty warm. Go to lowes or home depot. And buy an 8' stick of 3/4" alum U channel or C channel. Its 15.99 at lowes. Or 10.99 at home depot.

If you dont have the money to buy alum. Run them in two groups of parallel, then series to the driver. Puts them at 700mA. You shouldnt need anything. But the strips are super flimsy. The cob is 2200mA at 36vdc, and at 72vdc it draws 1200mA of current.. the driver has enough voltage to run all of them. But only running the cob at 700mA its gonna draw like 69.5vdc. And the strips will get just under 24vdc. Your within your voltage range. So you'll need to wire the strips and cob in series with each other.

So if your not gonna heatsink the strips. I would wire two set of parallel then into series on the driver and the cob in series.

24 x 4=96vdc +69.5vdc (cob)= 165.5vdc

But I imagine the cob is gonna pull most of the voltage. @700mA the strips all together are only gonna push 16.8w ×4=67.2w and the cob is only gonna push 49w 70vdc× 1400mA=98w for total of 147w combined.
147w ÷4sqft= 36.75w/sqft

whytewidow · Jan 5, 2019

Like this. Easier to draw than to try to explain it.

This runs the strips at 700mA and I would hit the cob first.

Put the strips in in series parallel. Gives them 24vdc @700mA and gives the cob full voltage at 1400mA

GentleCaveman · Jan 5, 2019

whytewidow said:
At 1400mA they need to be on something, just to be safe. I run mine at 1667mA and they get pretty warm. Go to lowes or home depot. And buy an 8' stick of 3/4" alum U channel or C channel. Its 15.99 at lowes. Or 10.99 at home depot.

If you dont have the money to buy alum. Run them in two groups of parallel, then series to the driver. Puts them at 700mA. You shouldnt need anything. But the strips are super flimsy. The cob is 2200mA at 36vdc, and at 72vdc it draws 1200mA of current.. the driver has enough voltage to run all of them. But only running the cob at 700mA its gonna draw like 69.5vdc. And the strips will get just under 24vdc. Your within your voltage range. So you'll need to wire the strips and cob in series with each other.

So if your not gonna heatsink the strips. I would wire two set of parallel then into series on the driver and the cob in series.

24 x 4=96vdc +69.5vdc (cob)= 165.5vdc

But I imagine the cob is gonna pull most of the voltage. @700mA the strips all together are only gonna push 16.8w ×4=67.2w and the cob is only gonna push 49w 70vdc× 1400mA=98w for total of 147w combined.
147w ÷4sqft= 36.75w/sqft

whytewidow said:
Like this. Easier to draw than to try to explain it.

This runs the strips at 700mA and I would hit the cob first.

Put the strips in in series parallel. Gives them 24vdc @700mA and gives the cob full voltage at 1400mA

View attachment 4260168

Yo you are the best man, thanks alot for taking your time to explain all that. I can buy some channels, I tought I would need more complicated heatsink to cool the strips at that amperage. I'm not experienced as you see. By the way why there is two type of cxb3590's (36v and 72v one) if the 36v one can go up to 72v if amperage drops? Thats kinda confusing.

whytewidow · Jan 5, 2019

GentleCaveman said:
Yo you are the best man, thanks alot for taking your time to explain all that. I can buy some channels, I tought I would need more complicated heatsink to cool the strips at that amperage. I'm not experienced as you see. By the way why there is two type of cxb3590's (36v and 72v one) if the 36v one can go up to 72w if amperage drops? Thats kinda confusing.

I downloaded the datasheet for general cxb3590 didnt pay attention to what model you said you had. If you let me know which one you have. I can give a little bit better idea of what itll be running at, and tell me which actual strips you got I can help out a little bit better.

GentleCaveman · Jan 5, 2019

whytewidow said:
I downloaded the datasheet for general cxb3590 didnt pay attention to what model you said you had. If you let me know which one you have. I can give a little bit better idea of what itll be running at, and tell me which actual strips you got I can help out a little bit better.

Led strips part numbers : 2x SI-B8U261560WW (3500K) and 2x SI-B8V261560WW (3000K)

CoB part number : 1x CXB3590-0000-000N0HCD35G (36v)

whytewidow · Jan 5, 2019

Ok you got the LT F562b strips. They draw the same in both cct. 1120mA is typical. They are the same strips I'm running. I'm pushing mine at 1112mA. Give or take a few mA. So 700mA is way under driven. Which makes them more efficient. The voltage will be 24vdc at each strip. Which will be 16.8watts ×10 strips. 168w for just the strips.

GentleCaveman · Jan 5, 2019

whytewidow said:
Ok you got the LT F562b strips. They draw the same in both cct. 1120mA is typical. They are the same strips I'm running. I'm pushing mine at 1112mA. Give or take a few mA. So 700mA is way under driven. Which makes them more efficient. The voltage will be 24vdc at each strip. Which will be 16.8watts ×10 strips. 168w for just the strips.

What if I wire the strips in series but keep the driver dimmed almost half way down all the time? Driver dims down to 700mamps from 1400mamps. I can eyeball it to run around 1100mamps.

I've seen people run them @700mamps but I don't know if it will be enough. I want to get that optimum ppfd this time.

By the way I got 4 strips not 10. (oh I guess you showed the calculation for your light fixture)

whytewidow · Jan 5, 2019

GentleCaveman said:
What if I wire the strips in series but keep the driver dimmed almost half way down all the time? Driver dims down to 700mamps from 1400mamps. I can eyeball it to run around 1100mamps.

I've seen people run them @700mamps but I don't know if it will be enough. I want to get that optimum ppfd this time.

By the way I got 4 strips not 10. (oh I guess you showed the calculation for your light fixture)

Yeah my bad. Lol. I meant to say times 4.

GentleCaveman · Jan 5, 2019

Seems like we are both too high for this shit hahaha

whytewidow · Jan 5, 2019

If you dim the driver to 700mA and wire the strips is series they are only going to get half of that 350mA that's why wide open you get 1400mA to the cob and then the other 1400mA sent to the strips is split when come to the strip to 700mA. I dont think that cob will run at 700mA. Their typical current is 2400mA. Max of 3600mA

whytewidow · Jan 5, 2019

Running it at 36vdc @ 1400mA is 50.4 watts. And then your strips will be 24vdc @ 700mA is 16.8watts ×4= 67.2watt

GentleCaveman · Jan 5, 2019

Most of the people run their cxb3590's @1050 mamps 2400mamps is their test current, they are actually way mor efficient at lower mamps. But I thought only the voltage splits when we wire things in series. Am I wrong? Doesn't that mean all the strips and the cob should get 1400mamps?

colocowboy · Jan 6, 2019

What happens if the cob dies? Will the leds overdrive and kill the strips, or the power supply overheat? Fault tolerance is on my mind as I’m wanting to put together a veg light with these strips and I’m trying to decide how hard to drive them. I won’t be using any cobs but this scenario has been on my mind. Thanks in advance!

whytewidow · Jan 6, 2019

GentleCaveman said:
Most of the people run their cxb3590's @1050 mamps 2400mamps is their test current, they are actually way mor efficient at lower mamps. But I thought only the voltage splits when we wire things in series. Am I wrong? Doesn't that mean all the strips and the cob should get 1400mamps?

2000mA driver going to 4 strips in parallel gives each strip 500mA in series they all get 2000mA.

Sry I'm posting on more than one thread. I maybe getting the threads mixed up.

whytewidow · Jan 6, 2019

GentleCaveman said:
Most of the people run their cxb3590's @1050 mamps 2400mamps is their test current, they are actually way mor efficient at lower mamps. But I thought only the voltage splits when we wire things in series. Am I wrong? Doesn't that mean all the strips and the cob should get 1400mamps?

If they are running them at 1050mA then they will run at 700mA.

whytewidow · Jan 6, 2019

If you hook the cob up in series to the driver. It will b run at 1400mA bc you have a 1400mA driver.

whytewidow · Jan 6, 2019

If you hook it up just like I showed you in the pic I drew, the cob gets 1400mA and the strips get 700mA each. The reason I said do it like that was bc the strips at 700mA dont need any type of heatsinking. If your going.to bit aluminum channel you'll need a fan blowing on the back of the alum channel bc those strips at 1400mA will get slightly warm. The hotter they get the less efficient they run. If you mount them to c channel and run them at 700mA they will be super efficient

Samsung F series Gen 3 amperage question

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