• Here is a link to the full explanation: https://rollitup.org/t/welcome-back-did-you-try-turning-it-off-and-on-again.1104810/

DiY LEDs - How to Power Them

I

ImAgrAsian

Active Member
Sorry If I am posting this in wrong Forum. Been reading and a bit confused. Someone had mention on different forum saying if Hlg-185h-C1400 is use to drive COBs at say @1200ma. Driver still draw 1400ma from the wall. Is this True? Someone please help me understand this. Thanks
 
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sixstring2112

sixstring2112

Well-Known Member
ImAgrAsian said:
Sorry If I am posting this in wrong Forum. Been reading and a bit confused. Someone had mention on different forum saying if Hlg-185h-C1400 is use to drive COBs at say @1200ma. Driver still draw 1400ma from the wall. Is this True? Someone please help me understand this. Thanks
Click to expand...
that driver is good for 1400ma.it could be dimmed to 1200ma but full power is the 1400
 
I

ImAgrAsian

Active Member
@ss2112 thanks for reply. So if I dim driver down to 1200ma then it should only draw ~1200ma from the wall and not 1400ma correct? Just making sure I have enough juice for the drivers and not trip the breaker everytime light comes on
 
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sixstring2112

sixstring2112

Well-Known Member
ImAgrAsian said:
@ss2112 thanks for reply. So if I dim driver down to 1200ma then it should only draw ~1200ma from the wall and not 1400ma correct? Just making sure I have enough juice for the drivers and not trip the breaker everytime light comes on
Click to expand...
last time i checked a driver like this i wanna say the 1400ma setup with 5 cobs pulled like 1.8amps or 1800ma.you will have a bit of extra power being used to power the whole setup but not alot of extra.that said i have 4 of these drivers on 1 breaker with no problem at all.your normal breakers will be either 15 amp or 20 amp.mine are all 20 amp and i wire all my stuff for 240v so im pulling less amps and alot of these meanwells are a little more efficient at 240v then they are at 120v.the test i just mentioned was at 120v. but even at 120v you should be able to run 3 or 4 drivers per breaker(15 amp) with room to spare for safety.
 
GBAUTO

GBAUTO

Well-Known Member
Remember that the driver is a transformer. Input current isn't the same as the output. The total wattage of your arrays divided by the input voltage will give you a approximate input current.
 
B

Baura

Well-Known Member
Hello guys

I bought a GE driver(used in immersion refrigerated display) that runs at 1.2A - 55v max. I will use it with a 048-1812

The driver has a dip switch to choose 0.6 , 0.9 and 1.2A output.

But it have a dimming function as well.

The dc output wires and dimming wires are together in a molex connector(4 wires one conector, almost like computer psu conectors).

When I "short" the dimming wires the output is 100%.
If I leave the dimming wires as they are on the connector,the output is like 20%.

I thought it was 0-10v dimming, but now I'm confused.

what kind of dimming is this?

Cheers
 
mahiluana

mahiluana

Well-Known Member
G84 said:
mixing different cri cob?
Click to expand...
:peace: Make sure both cobs have ~ the same Vf.
So the current will be devided ~ 50% / 50%.
Take care of an efect that happens if one cob get much more current than the other:

- He will get hoter than the other cob --> Vf will go down with the rising chip temp. - and this cause aditional rising of current.

You avoid this with a good heat management (my cobs are :fire: watercooled) and making shure that one cob alone can stand 100% of the current.

eg. 1. pic - led driver 50W / 1,5A with 50W cob full spec. pink 1800K

2. pic - adding in paralell 50W cob ww. 3500K
- and ( 30W red 630nm in series with 10W 2000K )

3. pic - the combination of 11 cobs with 4 different spec. increase light efficacy ~ 50%
and my babies and me - like the fuller spec. a lot in flowering.

I doubt that a plant give significant response to the difference in cri of the same white cob -
but driving 2 cobs @ 50% current instead of 1 cob @ 100% will rise light output a lot and give you better results. :weed: So yes - it`s possible to mix different cri :eyesmoke:



S6002000.JPG

S6002043.JPG S6002042.JPG
 
I

ImAgrAsian

Active Member
Thanks again for the help yall. I can't decide on my setup for 5x5. I have clu048-1212 3500k 90cri. Debating between.
25cobs, 5 hlg-185h-c1050b or
24cobs, 6 hlg-185h-c1400b?
Any help/suggestion please.
 
B

Baura

Well-Known Member
Baura said:
Hello guys

I bought a GE driver(used in immersion refrigerated display) that runs at 1.2A - 55v max. I will use it with a 048-1812

The driver has a dip switch to choose 0.6 , 0.9 and 1.2A output.

But it have a dimming function as well.

The dc output wires and dimming wires are together in a molex connector(4 wires one conector, almost like computer psu conectors).

When I "short" the dimming wires the output is 100%.
If I leave the dimming wires as they are on the connector,the output is like 20%.

I thought it was 0-10v dimming, but now I'm confused.

what kind of dimming is this?

Cheers
Click to expand...
Maybe the installation guide can help.

Would it be like a "inverted" 10v dimming?
 

Attachments

J

justfuket

Member
Hey guys looking for a little help matching a pair of heatsinks to to some bridgelux v18's. The heatsink I'm looking at says I need a zhaga book led holder to mount it, could I just use kapton tape to mount it?
The led is a v18 bxre-50c5001-c-74 ran at 1050ma for 35 watts and the heatsink is a Moduled Xtra 9950-B.
Any help would be much appreciated.
 
O

OpenCannaWorms

Member
Hey folks, will a meanwell HLG-600H-48 power 6 Bridgelux BXRC-30E10K0-C-73? The chips have a forward voltage of 68.1v and the driver has an output of 127 ~ 431VDC. Im confused because it says it has a constant current region of 24-48v. I want to run the chips at around 100 watts. Thanks in advance.
 
SaltyNuts

SaltyNuts

Well-Known Member
mahiluana said:
:peace: Make sure both cobs have ~ the same Vf.
So the current will be devided ~ 50% / 50%.
Take care of an efect that happens if one cob get much more current than the other:

- He will get hoter than the other cob --> Vf will go down with the rising chip temp. - and this cause aditional rising of current.

You avoid this with a good heat management (my cobs are :fire: watercooled) and making shure that one cob alone can stand 100% of the current.

eg. 1. pic - led driver 50W / 1,5A with 50W cob full spec. pink 1800K

2. pic - adding in paralell 50W cob ww. 3500K
- and ( 30W red 630nm in series with 10W 2000K )

3. pic - the combination of 11 cobs with 4 different spec. increase light efficacy ~ 50%
and my babies and me - like the fuller spec. a lot in flowering.

I doubt that a plant give significant response to the difference in cri of the same white cob -
but driving 2 cobs @ 50% current instead of 1 cob @ 100% will rise light output a lot and give you better results. :weed: So yes - it`s possible to mix different cri :eyesmoke:



View attachment 3936112

View attachment 3936110 View attachment 3936111
Click to expand...
Nice. is that what is called a hybrid serial/parallel wiring arrangement?

btw how do those pink cobs do? Are they ebay cheapies?
 
BiggestLittleGrower

BiggestLittleGrower

Active Member
going to be using 2 QB 304 in my next light build. picking a driver to run these and wanted to get your guys opinions

I was thinking a HLG 320h c1400 and running them in series

or would it be better to run a
HLG 320H c2800 and run them in parallel?

its the same either way no?

HLG 240h would not be enough to run these boards 130-150 watts each. again sorry still learning and trying to calculate this out myself.
 
mahiluana

mahiluana

Well-Known Member
SaltyNuts said:
how do those pink cobs do? Are they ebay cheapies?
Click to expand...
There are different types(producers) of these 1500-1800K chips on the asian market.
Some phosphor layers are thinner than others and so emit more blue and higher lumens/W.
driving them @ low (25-33%) current - offer an easy, cheap and efficient way to veg. and bloom with a single spectrum.
 
SaltyNuts

SaltyNuts

Well-Known Member
mahiluana said:
There are different types(producers) of these 1500-1800K chips on the asian market.
Some phosphor layers are thinner than others and so emit more blue and higher lumens/W.
driving them @ low (25-33%) current - offer an easy, cheap and efficient way to veg. and bloom with a single spectrum.
Click to expand...
yes sir. which do you use? do you have any recommendations for cheap cobs of relatively higher quality?
 
GBAUTO

GBAUTO

Well-Known Member
Al Yamoni said:
How many citizen clu1818 could I fit in series on a single hlg-480h-c1400b driver?
Click to expand...
Al Yamoni said:
How many citizen clu1818 could I fit in series on a single hlg-480h-c1400b driver?
Click to expand...
Looks like the driver has 343V available so just divide that by the forward voltage of the chip and use the lowest whole number( example-6.43 would be 6 chips)
P.S.-be VERY aware about safety-that much DC voltage WILL KILL YOU
 
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