Help for cxb3590 light config

PilouPilou

PilouPilou

Well-Known Member
Hello all!

For 1st post 1st noob question!

I bought a cxb3590 panel and it is my 1st cree cob light - the light has 4 cobs, a 320 Watts MW driver and a dimmer knob. I opened the light and the driver used is the HLG-320H-36B.

-I'd like to know what % of power you advice to use with the dimmer for the best results? I use the light on an area of ~30x30 inches (~75cm x 75cm).
More power is better or not? It seems "no" from what I can see...

Thank you in advance for your replies................. and sorry for my basic english... frenchy alert!!! :wall: :-P
 
PilouPilou said:
Hello all!

For 1st post 1st noob question!

I bought a cxb3590 panel and it is my 1st cree cob light - the light has 4 cobs, a 320 Watts MW driver and a dimmer knob. I opened the light and the driver used is the HLG-320H-36B.

-I'd like to know what % of power you advice to use with the dimmer for the best results? I use the light on an area of ~30x30 inches (~75cm x 75cm).
More power is better or not? It seems "no" from what I can see...

Thank you in advance for your replies................. and sorry for my basic english... frenchy alert!!! :wall: :-P
Click to expand...
:leaf::leaf:Bonjour & WELCOME TO R.I.U :leaf::leaf:
yes more power 100% is better during flower &
50% power for veg
:peace:VG:eyesmoke:
 
verticalgrow said:
Good question, because its better efficiency running COBs @ 40w.
:peace:VG:eyesmoke:
Click to expand...
OMG.. why I don't understand! If more efficiency so why should I use light at 100% (4x80W) if at 4x40Watts there is more efficiency.. I don't understand sry! I promise then I don't ask questions anymore!! ;)
At 100% of my light I will have biggest flower but it is more efficient at 40Watts... :confused: :roll:
 
PilouPilou said:
OMG.. why I don't understand! If more efficiency so why should I use light at 100% (4x80W) if at 4x40Watts there is more efficiency.. I don't understand sry! I promise then I don't ask questions anymore!! ;)
At 100% of my light I will have biggest flower but it is more efficient at 40Watts... :confused: :roll:
Click to expand...
lol, ask as many questions as u want.

COB @ 40w = 60% efficiency,
that means 60% light & 40% heat.

COB @ 80w = 40% efficiency,
that means 40% of 80w is light & 60% = heat
:peace:VG:eyesmoke:
 
verticalgrow said:
lol, ask as many questions as u want.

COB @ 40w = 60% efficiency,
that means 60% light & 40% heat.

COB @ 80w = 40% efficiency,
that means 40% of 80w is light & 60% = heat
:peace:VG:eyesmoke:
Click to expand...
thank you for your patience.. lucky to meet you for my first thread!...but why you adviced me to run my light at 100%... that's the point I don't understand. Can I have better yield at 80W and why if more efficiency at 40W?
 
Running @100% = more heat and less par per watt but can burn / bleach plants if too close.
Running @50% = less heat and more par per watt but they need more cobs and closer to plants for same results.
The people running lower watts spread out the cobs and have more of them. They get the same growth but spend more on cobs and less on air conditioning and get a little better light per watt of power.
 
PilouPilou said:
OMG.. why I don't understand! If more efficiency so why should I use light at 100% (4x80W) if at 4x40Watts there is more efficiency.. I don't understand sry! I promise then I don't ask questions anymore!! ;)
At 100% of my light I will have biggest flower but it is more efficient at 40Watts... :confused: :roll:
Click to expand...
I get it bro. I think the same way and some of these COBs don't understand why. If you run a light at 60% efficient at 1/2 of its rated wattage. Well, yeah that's efficient. But, the lumens, par or whatever they study doesn't include that some people, micro growers like me for instance, are not strained by expense in such a small personal grow. I mean, I grow for like .10-.50 a gram lol. I did the math.

Anyway. When something gets hot! That means POWER! So, when you are pushing that hitch to its limits well. YOU GET MORE LIGHT! So you burn that COB up. That's why you buy cheap yesterday's COBs for like $15-$25 and not today's stuff that will eventually be $10-$20. lol.

Burn that bitch up! Well. I mean be safe and don't burn your house down. But, in such a small grow that is not making any money at all, these little occasional expenses aren't a big deal. On a X100 scale it might be different. Some of us just want te power tho. Not the efficiency. More power means more light.

I'm so stoned. Damn.lol
 
I think those cobs are running at 2.2 amps, so this example should be relevant.

At 2.1 amps (75 watts) one 3590 = 37.5 par watts / .5 par watts per watt
At 1.4 amps (50 watts) one 3590 = 28 par watts / .56 par watts per watt (more efficient, less light)
 
GrowUrOwnDank said:
I get it bro. I think the same way and some of these COBs don't understand why. If you run a light at 60% efficient at 1/2 of its rated wattage. Well, yeah that's efficient. But, the lumens, par or whatever they study doesn't include that some people, micro growers like me for instance, are not strained by expense in such a small personal grow. I mean, I grow for like .10-.50 a gram lol. I did the math.

Anyway. When something gets hot! That means POWER! So, when you are pushing that hitch to its limits well. YOU GET MORE LIGHT! So you burn that COB up. That's why you buy cheap yesterday's COBs for like $15-$25 and not today's stuff that will eventually be $10-$20. lol.

Burn that bitch up! Well. I mean be safe and don't burn your house down. But, in such a small grow that is not making any money at all, these little occasional expenses aren't a big deal. On a X100 scale it might be different. Some of us just want te power tho. Not the efficiency. More power means more light.

I'm so stoned. Damn.lol
Click to expand...

Np.. me too!

Morality: I will have a biggest yield at 320W (4x80W) than 160W (4x40W) on my 30x30 inches area?
 
PilouPilou said:
thank you for your patience.. lucky to meet you for my first thread!...but why you adviced me to run my light at 100%... that's the point I don't understand. Can I have better yield at 80W and why if more efficiency at 40W?
Click to expand...
your welcome bro,
The recommended minimum and maximum flowering and full cycle footprints are at 500 and 1200 PPFD.
The recommended minimum and maximum vegetative footprints are at 300 and 700 PPFD.
:peace:VG:eyesmoke:
 
PilouPilou said:
Np.. me too!

Morality: I will have a biggest yield at 320W (4x80W) than 160W (4x40W) on my 30x30 inches area?
Click to expand...
I went back and read original post again. You are in a small micro area like I do. Your running 36v COBS at 75 watts each. Or 80 whatever. I honestly can't advise you of the specifics. But the more power, more light, less efficiency, but in a small space that is a pittance of added electric expense. I would def dim it down below the limits tho. And make sure you have proper cooling. I am thinking like 75% would be my conservative limit and I would keep an eye on temps and everything. It's hard to sleep if you are worried about your house catching on fire. I'm actually being serious about the safety. That's priority one.

Anyway. Man it sounds like you should kill it with that light in such a small space. Start dimming low and move it up and see what happens. keep us informed because I'm just learning too.
 
GrowUrOwnDank said:
I went back and read original post again. You are in a small micro area like I do. Your running 36v COBS at 75 watts each. Or 80 whatever. I honestly can't advise you of the specifics. But the more power, more light, less efficiency, but in a small space that is a pittance of added electric expense. I would def dim it down below the limits tho. And make sure you have proper cooling. I am thinking like 75% would be my conservative limit and I would keep an eye on temps and everything. It's hard to sleep if you are worried about your house catching on fire. I'm actually being serious about the safety. That's priority one.

Anyway. Man it sounds like you should kill it with that light in such a small space. Start dimming low and move it up and see what happens. keep us informed because I'm just learning too.
Click to expand...

Oh thank you very much!!
That's what I was thinking... around 70%.. concerning the temperature this panel is very very cool! Fresh air comes out from it.. very good air cooling even at 100%! panel size is 18x18 inches so their is place inside for a good cooling. I have an old 4xcob epishit(!) 4x100W actual Watts and compared to the x4 cxb3590 it is like black and white concerning heat!
 
popeyesailorman said:
Running @100% = more heat and less par per watt but can burn / bleach plants if too close.
Running @50% = less heat and more par per watt but they need more cobs and closer to plants for same results.
The people running lower watts spread out the cobs and have more of them. They get the same growth but spend more on cobs and less on air conditioning and get a little better light per watt of power.
Click to expand...

I've just seen your post now and thank you for your reply it's exactly what I needed to know! So... if I'm right, a cxb3590 with 80W can be as efficient as a 40W one if temperature of the light/grow space is low.
 
Rahz said:
I think those cobs are running at 2.2 amps, so this example should be relevant.

At 2.1 amps (75 watts) one 3590 = 37.5 par watts / .5 par watts per watt
At 1.4 amps (50 watts) one 3590 = 28 par watts / .56 par watts per watt (more efficient, less light)
Click to expand...
What 320Watts MW driver do you advice for x4 cxb3590?According to you, which one is the best to use - I have a dimmer.
Thank you.
 
Rahz said:
HLG-320H-C2100B if you're using 4 3590s. It will drive them at 75 watts each for 300 total.
Click to expand...
Thank you very much for your reply - the driver has 20W of loss, isn'it? In your opinion what is the best driver to use with 4 cxb (square config) in a 30x30 inches area.. power and serie?
 
Efficiency is based on how cool you can keep the cobs the colder the better.

My LED face temps at 1.3 - 1.4 amps are 35-40C and get really good lm/w
 
Last edited:
PilouPilou said:
Thank you very much for your reply - the driver has 20W of loss, isn'it? In your opinion what is the best driver to use with 4 cxb (square config) in a 30x30 inches area.. power and serie?
Click to expand...

20w less than max isn't going to decrease the efficiency of the driver by any notable amount but you could get by with a 200w setup in that space. 30x30 is 6.25 square feet. If you used a HLG-185H-C1400B the PPFD will be just under 900. HLG-240H-C1750B will provide about 1035 PPFD and the HLG- 320H-C2100B will provide almost 1200 PPFD. I think the 200w setup would be bitchin', whether you want to go higher than that is up to you.
 
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