Cob heat issues

[caverage]

Yep...I just picked up a Meanwell HLG120-C1050A on Ebay for $50 shipped.....
148vf Max @ 1050mA's.
http://www.ebay.com/itm/Mean-Well-HLG-120H-C105A-/261741899678?_trksid=p2141725.m3641.l6368

what are you running with it ?

 

[Abiqua]

what are you running with it ?

Right now I have 2x Cree 3070 3k AB and 1x V29 3k [108ish volts in series] ........bought it to add a fourth and for adjustable pot....not dimmable though thru PMW or 10v, but not a huge deal, still 91-94% efficient.....

 

[caverage]

nice , and that driver puts out 155 watts ?

 

[caverage]

I wanted to find a dimmable as well. but the more I think about it , im pretty sure Its just gonna be on full blast since im using 50watts less if I go with this driver. Is there an advantage of running it in a series rather than parallel

 

[Abiqua]

nice , and that driver puts out 155 watts ?

yeah, technically....I haven't checked it yet though.....I need to get a Kill A Watt so I can at least determine my base lines...Compared to the chinese crap holes I have been sourcing also thru Ebay, this thing is a friggin tank!

 

[Abiqua]

I wanted to find a dimmable as well. but the more I think about it , im pretty sure Its just gonna be on full blast since im using 50watts less if I go with this driver. Is there an advantage of running it in a series rather than parallel

LED's in constant current, don't really like to be ran in Parallel unless you have extremely close VF's or current mirrors to regulate the circuit...

Running in series, takes advantage of the High Voltage produced on the DC Side....as in Series, you add voltage when wiring this way and current is hence Constant.....All these Meanwells are CC drivers....

No advantage other than just utilizing the current..... hth

 

[Abiqua]

If you really are interested in parallel wring with LED's, then here are two diagrams of what could be done....

 

[caverage]

Thanks for that @Abiqua !

I think Ill go with wiring in a series if I acquire that meanwell . I was thinking parallel as I would use a connector and split 1 to 4

 

[Abiqua]

Thanks for that @Abiqua !

I think Ill go with wiring in a series if I acquire that meanwell . I was thinking parallel as I would use a connector and split 1 to 4

Another note:

My driver is the HLG-C120-1050A [A =meaning there is only a dimmable internal pot]
There are also B and C versions for all current ranges too [350ma, 500ma, 700ma, 1050, 1400ma]....... B is for dimming with 10v external power source and C adds PWM dimming along with the other 2........

I would look for the C version, for your build, usually the same price as the other versions [A,B], but adds dimming capability for when you might want to use it....either analog [10v] or digital [PWM]

The Meanwell HLG-C185-C1050x, is the next step up and will do 5x 3070's @ 1050 amps......in the future the 185-1400X will do 4x the CXB 3070's @ 1400mA's....

THe HLG's are all badass drivers and about as good as gets for efficiency right now

 

[Rahz]

That is a lot of watts for a 2x2 tent. Lowering it to 160-200 would still be nice output for the space, but as far as cooling I think the main problem is the 25 feet of 4 inch duct really putting some resistance on that fan. A 190 CFM fan would probably be fine with a shorter duct... not sure that's possible in your situation though. At any rate, 60 watts per foot is nuts/awesome.

Edit: Wanted to add, you could use a 6-4" reducer in reverse and try that 25 foot run with 6" duct if you had some laying around. That would improve the airflow. Whether it would be enough to resolve the situation I'm not sure but it might be worth a try.

 

[alesh]

Another note:

My driver is the HLG-C120-1050A [A =meaning there is only a dimmable internal pot]
There are also B and C versions for all current ranges too [350ma, 500ma, 700ma, 1050, 1400ma]....... B is for dimming with 10v external power source and C adds PWM dimming along with the other 2........

I would look for the C version, for your build, usually the same price as the other versions [A,B], but adds dimming capability for when you might want to use it....either analog [10v] or digital [PWM]

The Meanwell HLG-C185-C1050x, is the next step up and will do 5x 3070's @ 1050 amps......in the future the 185-1400X will do 4x the CXB 3070's @ 1400mA's....

THe HLG's are all badass drivers and about as good as gets for efficiency right now

There are A, B and D versions.
A - internal pot dimiming (only IP65 rated).
B - MW 3 in 1 dimming (ext. pot, 1-10V or PWM).
And finally D version with timer dimming.
No C.

 

[caverage]

That is a lot of watts for a 2x2 tent. Lowering it to 160-200 would still be nice output for the space, but as far as cooling I think the main problem is the 25 feet of 4 inch duct really putting some resistance on that fan. A 190 CFM fan would probably be fine with a shorter duct... not sure that's possible in your situation though. At any rate, 60 watts per foot is nuts/awesome.

Rahz I tried Running just into the attic with maybe only 5 ft of ducting max. let it sit this way for about 2 hours and Didnt notice a difference.




I removed one driver/led slide connector and only have 3 cxas going in the tent at 150 watts of driver, havent used the killawat but IM guessing its around 190. temp dropped pretty significantly . Looks like ill definitely be ordering a new driver

 

[medicinehuman]

I am using a couple of these http://www.ebay.com/itm/Inventronics-160w-Led-Driver-Constant-Current-Type-Quad-Channels-Model-EUC-1/141584779393?_trksid=p2047675.c100012.m1985&_trkparms=aid=444000&algo=SOI.DEFAULT&ao=1&asc=20131230161411&meid=cfa39f658df7405bafcf2fd13af77e1c&pid=100012&rk=1&rkt=4&sd=131354816903 and they work fine, not too warm also. andhttp://www.ebay.com/itm/NEW-INVENTRONICS-EUC-160Q105ST-160W-CC-LED-DRIVER-QUAD-CHANNELS-OPEN-BOX-/390995971356?pt=LH_DefaultDomain_0&hash=item5b092d0d1c this 1050

 

[caverage]

Edit: Wanted to add, you could use a 6-4" reducer in reverse and try that 25 foot run with 6" duct if you had some laying around. That would improve the airflow. Whether it would be enough to resolve the situation I'm not sure but it might be worth a try.

I might give that a try

I am using a couple of these http://www.ebay.com/itm/Inventronics-160w-Led-Driver-Constant-Current-Type-Quad-Channels-Model-EUC-1/141584779393?_trksid=p2047675.c100012.m1985&_trkparms=aid=444000&algo=SOI.DEFAULT&ao=1&asc=20131230161411&meid=cfa39f658df7405bafcf2fd13af77e1c&pid=100012&rk=1&rkt=4&sd=131354816903 and they work fine, not too warm also. andhttp://www.ebay.com/itm/NEW-INVENTRONICS-EUC-160Q105ST-160W-CC-LED-DRIVER-QUAD-CHANNELS-OPEN-BOX-/390995971356?pt=LH_DefaultDomain_0&hash=item5b092d0d1c this 1050

have you done an efficiency test

 

[Abiqua]

I might give that a try


have you done an efficiency test

I believe that SupraSpl did the efficiency test on these and they fell somewhere between 87-89%...pretty good actually...but what was reported, these are unique drivers, as they have 4x parallel channels, and act wonky, when less than all 4 channels are being used....

I think these are a pretty good deal and looked over them as well, they have been on Ebay for a bit...

 

[NapalmD]

I'm running 6 cxa3070s in a 2x2.5 at 240 at the wall and my temps have been warmer than when I was running the Onyx at 226 at the wall. 79 with highs of 81 before and now with the cobs it's been a stable 84 and peaked today at some point at 88! but the outside room was pretty warm today.
It hasnt been uncommon for my tent to hit 86 even with the cool outside air intake. I have my inside fan aiming down at the lights, well one of the lights and canopy as of an hour ago.
Waiting to see now if that helps.

I wonder if it could be the cobs light hitting the thermometer because the thermometer was never in the direct light of the Onyx.

 

[caverage]

They seem cheap enough to give them a run !

I'm running 6 cxa3070s in a 2x2.5 at 240 at the wall and my temps have been warmer than when I was running the Onyx at 226 at the wall. 79 with highs of 81 before and now with the cobs it's been a stable 84 and peaked today at some point at 88! but the outside room was pretty warm today.
It hasnt been uncommon for my tent to hit 86 even with the cool outside air intake. I have my inside fan aiming down at the lights, well one of the lights and canopy as of an hour ago.
Waiting to see now if that helps.

I wonder if it could be the cobs light hitting the thermometer because the thermometer was never in the direct light of the Onyx.

try shading your therm like supra mentioned, I have a cone paper cup that is cut down to about an inch above mine around the wire like a lil umbrella

 

[gk skunky]

Where are you measuring you temps? Above my lights there is a 6-10* difference than at the canopy. heat rises. I measure at canopy and stay around 79-82. If I measured above the lights the ambient temp would be around 90.