That the parallel are more flexible right? That was kind of my conclusion, with limited knowledge.
Luminus CXM-32 Gen3 the next big thing??
- Thread starter bassman999
- Start date
Silver or lead
Well-Known Member
Correct, you can hook up 2 or 20 cobs up to them,so to say.
Cobs are getting more efficient al the time. When it come time to upgrade I can take cobs from one driver and throw them on an existing fixture, doubling the cobs on it should increase efficiency by about 10%.
Now with an empty driver I can just throw the new more efficient cobs without having to pay for a new driver or heatsinks, or throwing any of my current equipment away.
sixstring2112
Well-Known Member
Keep in mind many cob manufacturers do not recommend parallel wiring.you should consider whether the cobs in your system design will handle extra load if one of them should happen to burn out or fail for any reason.because when this happens the amp load then gets split between the remaining cobs.just something to think about when designing the system and possibly choosing a driver that is already close to overpowering the system. Give yourself a little wiggle room 
qballizhere
Well-Known Member
How so??? you can go from 2-8 cobs per driver or more if you want. The elg-240-54-d2 i have mentioned can go as low as 27v
you only have to worry if one fails so plan around it
CobKits
Well-Known Member
id say 3 minimum and make sure the other 2 can take all the current, just in case
nevergoodenuf
Well-Known Member
Cool them as if you are only using 2, but run as many as need at the time.
Kush_Dabz
Member
The thing is with 6 cxm22s @1050mA/51.1V =321.93W we are about 2W over specs, 1.6V over specs but still under max V open circuit specs. My guess is for only 1.6V or 2W over it will work but it would be nice to have someone test it to know if this works before ordering this specific cob/driver combo
SimonBarSinister
Well-Known Member
This is what i was wondering also so i guess while my @CobKits order is shipping im going to go over everyones driver combo suggestions and do some comparing. ( i went back to growMau5 school and payed attention this time !) thanks everyone !
FWIW I have 6 vero29 SE 50v versions hooked up to a HLG 320H C1050a and at full power 1.2a it puts out ~365watts, but these cobs also skirt the voltage limit of the driver.
With the cxm22s I would think theyd accept current up to where they max out the voltage of the driver, where ever 50.8v coincides with on the current chart. This also means you wont be able to get the most out of the driver. You might be able to squeeze more out of a parallel setup because of this.
Kush_Dabz
Member
Thanks man makes sense. Looking into HLG-320H-54B or 600H drivers setup. 320H for 6 cobs or 600H for 12. Quick question: why is the BJB holder better than Ideal for parallel? Do they both have place to connect 2 wire per pole(+/-)?
bassman999
Well-Known Member
![IMG_20170112_203454[1].jpg](/data/attachments/2974/2974973-96c826d276d8144e3fd386b2b35558ef.jpg)
![IMG_20170112_203328[1].jpg](/data/attachments/2974/2974974-1d9f123c05f88acfb4ec89ae7515f8a4.jpg)
![IMG_20170112_202901[1].jpg](/data/attachments/2974/2974975-9bdedac95c28308aa3c2bc58366f654b.jpg)
This is with only one bar built, but the other bar will be done as soon as my back allows.
Running CXM22s at 700ma
pinner420
Well-Known Member
Looking proper.. get your yoga instructor to come over for a private lesson...
bassman999
Well-Known Member
I hink they would have ben bigger with the 2nd light in there, but next run will have oth from the beginning.
Yeah I need some sort of massage or acupuncture or....so I can be the guy on the avatar again
Silver or lead
Well-Known Member
It's looking great bass! I think cobs make it too easy. Everything else is just fighting the light compared to this.
bassman999
Well-Known Member
Cobs and organic is a perfect recipe for me to relax and watch them go.
I did get them a top dress yday though
Silver or lead
Well-Known Member
I'm not organic but I'm pretty damn close. I sure as hell am not feeding them a ton of stuff. 400 ppm max after ph correction. Most of the time just ph correction right now.
bassman999
Well-Known Member
I couldnt keep ph meters working and thats the main reason I switched honestly. I was buying new ones every few months., but this is easier and I get better results because ferts always get build up or something for me by the middle of flowering or a deficiency with my ph being off.
I sold my ebb n gro my lights and all my meters and started over with led and organic
Silver or lead
Well-Known Member
I couldn't manage without a ph meter. I fed my plants under ph7.5 once and regretted it. I always aim for the runoff to be 6.5. Most of the time I try and creep there. I should take a big whack at it before I put it into flower.
bassman999
Well-Known Member
My tap water is over 7.5 normally and my girls are fine with it now, but I used to battle with ph swings and went to RO then to RO and tap mixed and that was the best I think because I got tired of lugging jugs home