I am seeking for right led

Miu O Deus

Member
Hello everyone.I am new in the groowing subject.As a girl i do not understand this led shit.My space about 40x40x60 cm.And i have a driver (150w-0,7amps).Acording to this instruction which led will be the suitable one for me ? By the way is it possible that i can use Cxb or vero ?
 

Atulip

Well-Known Member
150w of cobs in that small of a space might be too much. 2000+ ppfd


Would need more info on the driver if you want to re use it. But should be fine for cxbs or veros based on watts and amps.
 

cdgmoney250

Well-Known Member
So the Voltage output is the capable range of the driver. Since it is a CC driver (Contant Current), the Amperage will stay the same at 700ma (.7A). You can "load" the driver running as many LEDs as you can at .7A, as long as you don't exceed the Voltage output range. This driver has an operating output Voltage 107V - 214V. The driver should be run within this range.

Each LED uses a certain voltage during operation when current is applied. This is called Voltage drop or (Vf).

The Bridgelux Vero 29 and also the Cree CXB3070/3590 have a Vf between 35-38 Volts.

The goal here is to load your Driver with as many chips as you need to fall within the operating output Voltage (107V-214)

Therefore, if you ran 3 of the above mentioned LEDs, you would just barely load the driver to meet the minimum operating output Voltage of 107V @ 700ma.

Keeping this is mind, you could power a maximum of 5-6 of the mentioned LEDs @ 700ma.

HTH

Cheers:joint:
 

kmog33

Well-Known Member
Yeah I think you should be able to power either 6 bridgelux or crees with that driver. I guess that puts your voltage around 216v so it might clamp down the current but you might be ok.


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kmog33

Well-Known Member
Or 3 72v 3590@50w each and save on parts.
Mount it to the roof and go.

6 softer driven chips would work and possibly help with clearance. You just have to buy 2X as many cobs.
What's the spread different on 1 at 72v vs 2 at 36, when run at the same current? Ie will the one running at twice the watts as effectively cover the same distance?


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Greengenes707

Well-Known Member
What's the spread different on 1 at 72v vs 2 at 36, when run at the same current? Ie will the one running at twice the watts as effectively cover the same distance?


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Before I answer, are you talking specific to this threads original posters question? Or just for the sake of it.
 

cdgmoney250

Well-Known Member
I'd think CXB3590 @ 50w each would be a bit excessive in a space that small. 60cm is just just shy of 2'.
Just a thought, as I've only personal experience with CXA3070 and Vero 29.
 

Airwalker16

Well-Known Member
What's the spread different on 1 at 72v vs 2 at 36, when run at the same current? Ie will the one running at twice the watts as effectively cover the same distance?


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Twice the spread.. youd need 2 36vs for the same spread as one 72v. That's the only reason people would buy them, for a smaller space perhaps. Right?
But more cobs at less watts, gives you more canopy penetration if what I've read is right.
 

kmog33

Well-Known Member
Before I answer, are you talking specific to this threads original posters question? Or just for the sake of it.
Both. As far as the op is concerned if 2 gives the same or better spread at less intensity it may be better for the height of the space being used. Which brought up the question I asked because I am also curious to know.


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kmog33

Well-Known Member
Twice the spread.. youd need 2 36vs for the same spread as one 72v. That's the only reason people would buy them, for a smaller space perhaps. Right?
But more cobs at less watts, gives you more canopy penetration if what I've read is right.
You've stated two different opinions in this post about the same thing. If one gives the same spread as two, it almost makes the point of getting 2 moot except for the efficiency thing which at these currents is pretty negligible I think.


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Greengenes707

Well-Known Member
I'd think CXB3590 @ 50w each would be a bit excessive in a space that small. 60cm is just just shy of 2'.
Just a thought, as I've only personal experience with CXA3070 and Vero 29.
Both. As far as the op is concerned if 2 gives the same or better spread at less intensity it may be better for the height of the space being used. Which brought up the question I asked because I am also curious to know.
Spread in this situation is not an issue. 40x40cm. Anything is going to cover the whole thing pretty flawlessly.
For theory sake...yes.
But no to this specific situation. You would actually be increasing the light by running soft, so the total light in the area would be greater and more for the plants to deal with...and it is already "overkill". Not a big deal in practice, just as the difference in the lights wattages in this situation is moot cause in the ende the total light in the area is about the same.
Distribution in an area isn't going to improve between the two one sided options really. And side lighting has no clearance no matter how you drive(too small of grow space), so overhead is the best option. And I assume, like all newcomers that just want a light and an answer. Less components, easy 1-2-3 and done. Can easily add more later. I see it as a better fit.

And the point I just skimmed over that needs to said(@Atulip said) it's too much anyways and will need to be dimmed. Just helping run a higher wattage/lower cost system.
When 50w is being the hard driven option...you really don't have issues.

If we are talking about theory of the space. I would run one 72v overhead, and 4 36's on the walls. But personally think she needs more space around the plant to do it effectively vs purely overhead.
Twice the spread.. youd need 2 36vs for the same spread as one 72v. That's the only reason people would buy them, for a smaller space perhaps. Right?
But more cobs at less watts, gives you more canopy penetration if what I've read is right.
Just stop
 

Atulip

Well-Known Member
You could try 2 x cxb3590 72v. It's in the output range and its cheaper but you could have issues in such a small space. That's still 1500ppfd. 2 feet of height isn't a lot to work with, and that's a lot of light.

Honestly I'd downgrade the driver and run a single 36v @ 1.4a or a 72v at .7A
 

Miu O Deus

Member
I am very greatful to every of you thanks to your support i have learned lots of stuf.Only thing that i want is groowing into my old amplifier and i have not any space....http://www.eguvenlik.com.tr/leem-wx-12-30cm-500-watt-mdf-kabin-hoparlor-502-51-K.jpg
something like that.But i want to do that with a simple bulb or two pieces and i want least 50% efficiency.If i change the driver which one i should be recomended to buy and how many piece of led i must use in your advice,will it be efficent level of ppfd?.And if i use something like Hans panel does it more than 50% efficiency?
 
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