Cbx Series cobs. Cumulative info and comp.

Lighterfighter

Well-Known Member
bu tthen again why would the other sid epull way more wattss then the drivers supposed to to, idk wtf is goin on here. Now, f I think ill leave my speculation for some of the experts to jump in lol. DOnt want to harras a supplier for no reason, maybe i totally missed something.
 

REALSTYLES

Well-Known Member
WELL the news is discouraging. I just re ran the test, using the 3rd same model driver and it seems that it is the cobs. same wattage pull 127 at start 130 after. Which lewads me to really be concerned about the supplier stated above. I recall being told they only had 3 cxb3590 then they had an extra suddenly, When they shipped my order. I paid 14 days before and they said they had 3 and were waiting on the order, then I told them the paypal 14 day refund was comin up before they got thier new shipment. Then suddely they had a 4th and shipped. idk how but I do find it odd that one side pulls different. IT would take another hour or so of work plus thermal grease to rearrange and test em to isolate the one that is throwing it off so substantially. I bet I know which one tho.
Also I think you should run it for at least an hour before testing. Let the drivers get warm and it should balance out. I think that's what Supra does. I might be wrong so don't hold me to it lol. I'm still a new booty at this.
 

FESTER665

Well-Known Member
You ain't seen nothing yet just wait until I get my death sentences( HLG-185H-C500A drivers ) I'm gonna do a 10 cob light lol. I just hope I don't shock myself to death lol
Haha, you'll be fine just take your time and make sure all your connections are secure... No worries.

Got my driver board all figured out, the HLG-120H ballast will be coming off it and I'm waiting for another controller board so I can control the COBs like I can my 3w stars....

 

SupraSPL

Well-Known Member
Thanks, I will shoot him an e-mail. Pricing looks good on the CXB3070 AD, around $36ish. After a little more thought I think I may go with 18 COBS to replace a 1k instead of 16. That gives me 657 watts instead of 584. And 109700 lumens vs 97500. It still worries me that the 1k HPS has 140k lumens or more. But if I remember right I read Supra say some of it was lost due to the reflector.
You are right to be concerned but here are a few of the critical things that make the diference:
-HPS output is concentrated in the green/yellow/orange range which results in more lumens/W, but less photons/W than 3K LED
-The light is more evenly spread in the canopy, all the way to the edges, this is huge
-As you said, less lens/reflector losses than HPS hoods
-Finally, DIY COB grow lamps can now have much higher output efficiency than HPS.

And a few speculative reasons:
-The LED spectrum is more evenly spread across the visible range, probably increasing photosynthetic efficiency
-The LED has more output in the red range, probably increasing photosynthetic efficiency to some extent


The design you proposed would be about 51.3% efficient. 657 dissipation W would equal 337 PAR W. The 1000 HPS emits 360 PAR W. Your design would strongly outperform the 1000W HPS. Many growers are telling tales of 1.3 gpw with the new 1000w DE bulbs. If that is true, they should be achieving much higher gpw with CXBs (unless it turns out that radiant infrared light grows bud!) With organic soil, I get between 1.0 and 1.4 gpw with CXAs at 47% efficiency.
 

SupraSPL

Well-Known Member
WELL the news is discouraging. I just re ran the test, using the 3rd same model driver and it seems that it is the cobs. same wattage pull 127 at start 130 after.
The CXBs say B3590 on them, do all of yours have that stamp? What drivers are you using?
 

SupraSPL

Well-Known Member
You ain't seen nothing yet just wait until I get my death sentences( HLG-185H-C500A drivers ) I'm gonna do a 10 cob light lol. I just hope I don't shock myself to death lol
I hooked up an HLG-120H-C350B, running (6) CXA3590s. At 370mA the string is at 411V. I used 600V rated wire and installed grounding screws on the heatsinks. BUT, 2 of the modules are old and still using 50V hookup wire AND I have not hooked up all the grounds yet. I will get around to finishing it but so far, still alive :)
 

AquariusPanta

Well-Known Member
You are right to be concerned but here are a few of the critical things that make the diference:
-HPS output is concentrated in the green/yellow/orange range which results in more lumens/W, but less photons/W than 3K LED
-The light is more evenly spread in the canopy, all the way to the edges, this is huge
-As you said, less lens/reflector losses than HPS hoods
-Finally, DIY COB grow lamps can now have much higher output efficiency than HPS.

And a few speculative reasons:
-The LED spectrum is more evenly spread across the visible range, probably increasing photosynthetic efficiency
-The LED has more output in the red range, probably increasing photosynthetic efficiency to some extent


The design you proposed would be about 51.3% efficient. 657 dissipation W would equal 337 PAR W. The 1000 HPS emits 360 PAR W. Your design would strongly outperform the 1000W HPS. Many growers are telling tales of 1.3 gpw with the new 1000w DE bulbs. If that is true, they should be achieving much higher gpw with CXBs (unless it turns out that radiant infrared light grows bud!) With organic soil, I get between 1.0 and 1.4 gpw with CXAs at 47% efficiency.
I think the whole grams per watt can be misleading.... whoa... deja vu... did you feel it too, Supra?

;)

Too many factors to take into account, especially when comparing massively manufactured products and those made by any joe blow.

But your logic seems to slide through the offices of my brain without any papers being rumpled, so what's the secret sauce in the DE 1000 fixtures? Is it the Godiva-extract that they coat the bulbs with? I want to know.

:lol:

I think I'm about due for a break from RIU...:hump:
 

SupraSPL

Well-Known Member
Ya gpw is a good data point, but it cannot take into account what really matters to most of us, cannabinoinds and terpenes. If one guy is growing a large yielding big bud in a hydro setup with HPS and getting 1.3 gpw and another guy is growing a frosty stinky sativa dom OG in organic soil with LED and getting 1.3 gpw, we might be mistaken to conclude they are performing equally.

Greengenes Blue Dream side by side took all that into account with his side by side by using a well known cutting on both sides, same soil, air, temps, drying etc. The 600W led strongly outperformed the 1000W HPS in terms of GPW and the LED sample tested higher in THC and terpenes. Very strong data point and I estimate that particular LED lamp was 34% efficient so we can imagine the potential at 50-60% efficiency.
 

SupraSPL

Well-Known Member
Hmm good question. Probably the next step would be to check the string with a multimeter. It is easiest to check voltage because you can just use the probes to check in parallel without disturbing anything but to check current you need to bug into the string and put the probes in series. I cam across an HLG-185H-C1050A that was putting out 1150mA with pot turned up to max. So the output of the drivers may go much higher than the specs. I have an HLN-80H-36A that is supposed to put out 2.3A but puts out 2.55A.

On the B versions you can make marks so you know where to set the knob for each current. In order to get the max power ou tof the B versions you have to add a switch and completely disconnect the dimmer knob. My HLG-120H-C350B goes up from 330mA to 370mA when I disconnect the dimmer knob.
DSC08260b.jpg
 

Lighterfighter

Well-Known Member
ohh for sure. I was waiting, it ramps up a little. or stabalizes. There was one cob yesterday that when I put it together smoke came off itMaybe somthing was between the plat and burnt off?), so I shut it off but that was why I was concerned about heat and am pretty sure that cob maybe fried or somthing idfk. @Supra I will check the stamps when I get my others in and do some testing, but I was using a watt meter to test the HGL 120 c1050 and have multimeter too.how important is the ground? I GOt a Ground on the drivers but not on each individual heat sink... is that bad?
 

Lighterfighter

Well-Known Member
These mother fuckers be like, well cree didnt change the tag after the first order, they all say 3590r for the first order, I dont believe em. I feel that the wattage diff and shit is all indicative of me getting taken advantage of. Then I was like wel without the mark..... do they look exactly the same, they said yes. But I could test with the voltage. to which I respond, that was the whole problem I told you I was having when you asked if I got them! how does this not make sense! can any one attest to how sketch this is OR HOW WRONG i AM pls..
 

SupraSPL

Well-Known Member
All good man, I have received COBs from KB and they tested as advertised. He might be right that they are still changing around the labels because the first batches were mostly samples. Do all of yours say 3590R?

That said, it would be possible to find out if you have CXAs or CXBs by using your multimeter to check the Vf of each COB. You set the multimeter to volts and touch the probes to the solder points of the COB. Wear sunglasses if you will be exposed to the LES or even better if you can attach you multimeter to the string while it is turned off. You would want to do this test with the driver set to max so we have a general idea what the current is. Even better if you can bug in your multimeter to check current as well.
 

Lighterfighter

Well-Known Member
OKAY SO ITS RESOLVED: conclusion is king bright is sticking to thier guns on the fact that first print is really a cxb lol but they told me to throw them away lol like wtf. I originally got 4 (3cxa 1cxb tag) and now they are resending 5 cxb tags. I was more frustrated that he sent me pics and insisted they were the same, of course then told me to throw em away. The cob with the higher wattage, had one cxb tag. the other one with 2 cxa tags was the 130. I think you told me the cxa would have issues on my driver and they visibly flicker a lil like floros. @SupraSPL
 
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