Matching Drivers and COBs

robincnn

robincnn

Well-Known Member
ttystikk said:
Do not adjust your set. You're entering the Twilight Zone....
Click to expand...
I have also wondered why the Vdc adjustment. I have used 36V drivers and they did not give enough voltage for Vero 29's. I adjust the V to max around 40V so that it can power a Vero 29's.
Increasing Vdc will increase power since power is current multiplied with voltage.
I think adjusting Vdc should be fine as long as the current is also not maxed out. ie The Voltage X DC current in within driver max limits.

example HLG-320H-36
18 ~ 36V 8.9Amps
36*8.9= 320 watts
Now if you were to adjust Vdc to 40V
Then 320/40= 8amps
So adjust current so that it does not go over 8amps
 
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bassman999

bassman999

Well-Known Member
robincnn said:
I have also wondered why the Vdc adjustment. I have used 36V drivers and they did not give enough voltage for Vero 29's. I adjust the V to max around 40V so that it can power a Vero 29's.
Increasing Vdc will increase power since power is current multiplied with voltage.
I think adjusting Vdc should be fine as long as the current is also not maxed out. ie The Voltage X DC current in within driver max limits.

example HLG-320H-36
18 ~ 36V 8.9Amps
36*8.9= 320 watts
Now if you were to adjust Vdc to 40V
Then 320/40= 8amps
So adjust current so that it does not go over 8amps
Click to expand...
so if you turn V up I will go down so as to keep P constant?
Ok that is what I was hoping
 
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robincnn

robincnn

Well-Known Member
bassman999 said:
so if you turn V up I will go down so as to keep W constant?
Click to expand...
no, I tested with HLP-80H-36 sometime back. The I (current) did not go down when i maxed out Vdc.
In the example above. If you max out Vdc to 40V then do not expect current to go down from 8.9 Amps to 8 amps on its own. It will be somewhere in the middle or might even stay at 8.9amps. May be this is why @ttystikk called it twilight zone.
You might be able to get 40V at 8.9 Amps= 350 watts. But since its rated at 320 watts, reduce current to keep power around 320 watts for max reliability.
 
bassman999

bassman999

Well-Known Member
robincnn said:
no, I tested with HLP-80H-36 sometime back. The I (current) did not go down when i maxed out Vdc.
In the example above. If you max out Vdc to 40V then do not expect current to go down from 8.9 Amps to 8 amps on its own. It will be somewhere in the middle or might even stay at 8.9amps. May be this is why @ttystikk called it twilight zone.
You might be able to get 40V at 8.9 Amps= 350 watts. But since its rated at 320 watts, reduce current to keep power around 320 watts for max reliability.
Click to expand...
This only works with (A) or (C), not the (B) version then?
 
ttystikk

ttystikk

Well-Known Member
robincnn said:
no, I tested with HLP-80H-36 sometime back. The I (current) did not go down when i maxed out Vdc.
In the example above. If you max out Vdc to 40V then do not expect current to go down from 8.9 Amps to 8 amps on its own. It will be somewhere in the middle or might even stay at 8.9amps. May be this is why @ttystikk called it twilight zone.
You might be able to get 40V at 8.9 Amps= 350 watts. But since its rated at 320 watts, reduce current to keep power around 320 watts for max reliability.
Click to expand...
Awww shit, I was just makin' a funny...
 
littlejacob

littlejacob

Well-Known Member
Bonjour
@robincnn do you mean hlg-80-36...or hlp?
What is the difference?
I was planning to run 5 V13 on it (@500mA 32V 16w 41.55%) in parallel!?
Have a great day ★
 
robincnn

robincnn

Well-Known Member
Bonjour @littlejacob
Google HLP-80H it is naked power supply. It will make you dance if you do not ground it correctly or touch at wrong place. Not safe kind. SDS said they can be like tasers.
Stick with HLG-80H
HLG-80H-36 would require you to put all V13 in parallel. Safe low DC voltage

For series cob connection(recommended) with constant current driver.
Since you in Europe did you consider
4x V13 on ELG-75-C500
Or 5 or 6 V13 on Elg-100-c500

HLG-80H-c is available in 350ma and 700ma only
 
bggrass

bggrass

Well-Known Member
How does driver efficiency come into play in a configuration? For example 4 x 3590 3500K 36V CD @1400mA, 195W total, 56% efficient, run on a 86% efficient driver and run on a 94% efficient driver. How do the numbers change?
 
Malocan

Malocan

Well-Known Member
Hello :)
i wanne build a new LED fixture, i would like to use one hlg-60h-c700a driver and three CXB3590 3500K CD @ 700mA (23W ea).
I would like to know how much this LED fixture use total watt with the driver, i only know how to calculate the watt consum from the LEDS.

0,7 * 32 =22,4W but how i can calculate how much the driver or the whole LED fixture use :/ , maybe someone is able to explain me how to calculate that.

This Led fixture i wanne build 4 times so i would need 4 * hlg-60h-c700a driver and 12 * CXB3590 3500K CD.
With that kind of Led fitxures i would be mega modular,so i could hang them individual over the canopy if necessary.
But now i wonder if i should better use other drivers to save energy, like one HLG-185H-C700 and one hlg-80h-c700.

With which driver setup i would save more energy, and how much more energy would use the other setup:?

SORRY for my bad english:/
THX for every help
 
bggrass

bggrass

Well-Known Member
alesh said:
The 86% driver setup will consume 226.7W.
The 94% one will consume 207.4W.
Click to expand...
Thanks alesh. I'm trying to figure out the math. My numbers come close to yours but not exactly. What am I missing?

195w x 1.14 = 222.3 for the 86% driver
195w x 1.06 = 206.7 for the 94% driver
 
K

kliend

Active Member
If you want to use multiplication, you would have to multiply using the inverse of the percentage. 1/x

1/.94 = 1.0638 195*1.0638 = 207.45w
1/.86 = 1.1628 195*1.1628 = 226.74w
 
Malocan

Malocan

Well-Known Member
alesh said:
195W / 0.94 = 207.4W
195W / 0.86 = 226.7W
Click to expand...
Hello Sir,
is that the way how to calculate the whole power(Watt) consum of the Led fixture with 2 different driver settings?
If yes, im a bit confused because last week i did build my first led light (@64%
(8 ) CXB3590 3500K CD @ 700mA (23W ea) $380
(1) HLG-185H-C700 $65
184 dissipation W ->66W heat ->)

If i try now to calculate 184Watt / 0,94 = 195 ,744 Watt
But if i check the Watt consum with a KILL A WATT (AMP meter), it says me i use 216,4 Watt

Did i something wrong? or did i use just wrong formula to calculate :?
 
K

kliend

Active Member
From where did you obtain the driver?

Also, how long did you run it on the Kill A Watt? For a few hours? Or just when you first plug it in?
 
alesh

alesh

Well-Known Member
Malocan said:
Hello Sir,
is that the way how to calculate the whole power(Watt) consum of the Led fixture with 2 different driver settings?
If yes, im a bit confused because last week i did build my first led light (@64%
(8 ) CXB3590 3500K CD @ 700mA (23W ea) $380
(1) HLG-185H-C700 $65
184 dissipation W ->66W heat ->)

If i try now to calculate 184Watt / 0,94 = 195 ,744 Watt
But if i check the Watt consum with a KILL A WATT (AMP meter), it says me i use 216,4 Watt

Did i something wrong? or did i use just wrong formula to calculate :?
Click to expand...
MW drivers usually put out slightly more than rated current. Did you measure the actual current?
 
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