2 x 308 QB - 250W lamp build question

H

heksa

Member
Hello everybody. Since my electronic knowledge is very limited (mechanic by trade) I want to use forum power to answer my question:
I bought 2 boards 308 pcs each of Samsung LM561C S6 leds. They are 22 s ,14 p , 2100mA max ,so they running 66V at 2100mA.
I am going to wire them in series so total voltage will be 132V for two.
And here comes my question : from tons of reading here and other forums I know that I should not run the boards at 2100mA for the efficiency reason (less lights ,more heat) ,so I am limited (in my humble opinion) to very few drivers :
- HLG-320H-C2100 -very expensive (HLG-240H-C2100 has max V output -119v -not enough?)
- HLG-240H-C1750 -expensive with good voltage range (71-143V) and 250.25 W
- ELG-240 - C1750 -best price with good voltage range (69 -137V) and 239.75 W
Which one should I use ??
Thank you in advance.
 
Chip Green

Chip Green

Well-Known Member
It should be noted that the ELG series must be run over 200v input to get the maximum rated output....
They will work on 120v volt, but that max forward voltage will be lower that 137....more like 102v /180w....
I do believe.
 
H

heksa

Member
Chip Green said:
It should be noted that the ELG series must be run over 200v input to get the maximum rated output....
They will work on 120v volt, but that max forward voltage will be lower that 137....more like 102v /180w....
I do believe.
Click to expand...
very important piece of information - thank you
 
ANC

ANC

Well-Known Member
heksa said:
Hello everybody. Since my electronic knowledge is very limited (mechanic by trade) I want to use forum power to answer my question:
I bought 2 boards 308 pcs each of Samsung LM561C S6 leds. They are 22 s ,14 p , 2100mA max ,so they running 66V at 2100mA.
I am going to wire them in series so total voltage will be 132V for two.
And here comes my question : from tons of reading here and other forums I know that I should not run the boards at 2100mA for the efficiency reason (less lights ,more heat) ,so I am limited (in my humble opinion) to very few drivers :
- HLG-320H-C2100 -very expensive (HLG-240H-C2100 has max V output -119v -not enough?)
- HLG-240H-C1750 -expensive with good voltage range (71-143V) and 250.25 W
- ELG-240 - C1750 -best price with good voltage range (69 -137V) and 239.75 W
Which one should I use ??
Thank you in advance.
Click to expand...
No reason not to run them at test current. It is still far from damaging heat levels and you literally only gain the equivalent of two 20W cfl tubes for every 300W running the more efficient numbers with larger number of strips, So it is no problem running them hard,
 
H

heksa

Member
ANC said:
No reason not to run them at test current. It is still far from damaging heat levels and you literally only gain the equivalent of two 20W cfl tubes for every 300W running the more efficient numbers with larger number of strips, So it is no problem running them hard,
Click to expand...
Running them hard , means going with HLG320H-C2100 driver which is twice the price of HLG240H-C1750
 
ANC

ANC

Well-Known Member
I would definitely take the 320W driver. Otherwise, it is like having a fast car with a block under the accelerator pedal.
I will now have to watch a video again, and I think it may have been pulled.... but I think you get a nice 280W driver with wifi and all kinds of stuff. WIll let you know if I find it.

Damn, you are out of luck, it was one of @Greengenes707 videos. Youtube ripped the rug from under his channel.

Seems the more legal weed gets the more anal they get. Anyway, I tagged him for you, so he might pitch in.
 
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H

heksa

Member
Well , this HLG-320 H-C2100 has almost 320W output (319.2 W) and will cost $ 120.00 Cad -I am in Canada
(thank you skoomd for arrow link) and the smaller sucker (HLG240-C1750) has 250.25 W and cost $ 80.00 (Cad)
(I will need four of them -bought more boards)
Running the boards at 250W will push them to about 82% of their capacity (good efficiency ?) and running them
at 320 W could be an overkill (less efficiency ,more heat?) Not enough knowledge for me to decide ,that's why
I asked you guys :)
 
Randomblame

Randomblame

Well-Known Member
heksa said:
Well , this HLG-320 H-C2100 has almost 320W output (319.2 W) and will cost $ 120.00 Cad -I am in Canada
(thank you skoomd for arrow link) and the smaller sucker (HLG240-C1750) has 250.25 W and cost $ 80.00 (Cad)
(I will need four of them -bought more boards)
Running the boards at 250W will push them to about 82% of their capacity (good efficiency ?) and running them
at 320 W could be an overkill (less efficiency ,more heat?) Not enough knowledge for me to decide ,that's why
I asked you guys :)
Click to expand...
It depends on your grow area? Calculate with 30-35w/sft. or 325-375w/m² for good results.
 
Randomblame

Randomblame

Well-Known Member
heksa said:
I believe (as Chip Green mentioned) they should be run with over 200V for full power
Click to expand...

Ahh, okay! Only 110/120vac in canada or is it possible to get 220/240vac too? Could be interesting because these drivers(HLG, ELG, ...) run usually with better effiency at 220/240vac. We are talking about ~2-3% depending on the used driver. With an HLG-320 that's nother 10w bulp like @ANC would say...(9,6w more heat from the driver).
 

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H

heksa

Member
Randomblame said:
It depends on your grow area? Calculate with 30-35w/sft. or 325-375w/m² for good results.
Click to expand...
I am not worried about coverage ,I just don't know if running boards at 320W will affect efficiency or damage them.
(yes we have access to 220V in Canada , but my rooms are already wired for 120V)
 
Randomblame

Randomblame

Well-Known Member
It really does'nt matters if you drive them a bit harder or not. Each LM561c has a limit of 200mA. Your boards have 14 parallel rows so the real limit is 2,8Amps not 2,1. The 2,1A are most probably calculated with no heatsink and even than you don't need to worry.
With 2,1A each diode gets 150mA(167lm/w), with 1,75A it would be 125mA/171lm/w(for 3000°k), that's only 4lm/w less.
 
ANC

ANC

Well-Known Member
You don't need to use all 320W of the driver, but it allows you to use all the juice your panels could ask for.

Think of it as an adjustable battery. You can hook a small bulb or a powerful bulb up to a battery, as long as they are the correct voltage... the small one would only pull a small amount of current and the strong bulb will pull more current. The capacity of the battery is of no material importance unless the big bulb could pull more current than the battery could provide. You could always if you have some cash later, add a 3rd panel to a 320W to chase the efficiency dragon.
 
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H

heksa

Member
Randomblame said:
It really does'nt matters if you drive them a bit harder or not. Each LM561c has a limit of 200mA. Your boards have 14 parallel rows so the real limit is 2,8Amps not 2,1. The 2,1A are most probably calculated with no heatsink and even than you don't need to worry.
With 2,1A each diode gets 150mA(167lm/w), with 1,75A it would be 125mA/171lm/w(for 3000°k), that's only 4lm/w less.
Click to expand...
Now you talking :) I can see the light !!! -thank you
 
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