12 COB, what amperage?
- Thread starter Skinny.g
- Start date
Boatguy
Well-Known Member
That is correct.
The ab has adjustable current, so you can set it where you want. They also are dimmable.
4 would be pretty perfect on one without adjustments
As I'm planning to make fixtures of 3 COBs, I can not connect 4 to a driver, in that case I will be forced to dim the light so it doesn't run at 2.2A. Maybe a hlg240 42b would be a better option?
BTW, What amperage I should be aiming for?
Talking about fixtures, as it's a rectangle, 8x4ft, I thought about 3 fixtures with 3 COBs each, independent and each with its one driver on it. What do you think? A better option?
BTW, What amperage I should be aiming for?
Talking about fixtures, as it's a rectangle, 8x4ft, I thought about 3 fixtures with 3 COBs each, independent and each with its one driver on it. What do you think? A better option?
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Airwalker16
Well-Known Member
Correct
Sorry u missed my last post haha
Boatguy
Well-Known Member
Max amperage on the cxb-3590 36v 3.6amp, 72v is 1.8amps.
Which ones do you have?
I have this one
CXB3590-0000-000N0HCD35G. It says max current 3.6A.
By the way looking for heatsinks, they are offering me this heatsink for 9 dollars, would it do its job? Looks quite good. Or should I spend 20 on an active one?
So should I go with a 1700 2000mA with this heatsink?
CXB3590-0000-000N0HCD35G. It says max current 3.6A.
By the way looking for heatsinks, they are offering me this heatsink for 9 dollars, would it do its job? Looks quite good. Or should I spend 20 on an active one?
So should I go with a 1700 2000mA with this heatsink?
Attachments
My first COB's were the Cree 3590's running at a cool 50 watts per COB. They're not as efficient as the Luminous COB's now days but they are stout and might last 20 years. The verdict is still out on daisy chaining thousands of little Samsung chips together and getting the dependability of good COBs. I've got some QB's and so far so good, but they just seem cheap to me. Bright freaking light and super efficient for sure but for how long only time will tell.
Go with the 80. It should put out more photons than the 90 I think.
Airwalker16
Well-Known Member
@diyled @Chip Green 80 or 90 CRI?
Chip Green
Well-Known Member
I never really got caught up in the fine details. As mentioned above, the 80 cri always have a little more L/W, and the 90 cri were a little more reddish in the spectrum charts, I do believe.
I tend to not GAF about minor idiosyncrasies.
I tend to not GAF about minor idiosyncrasies.
Moflow
Well-Known Member
Whn I ran the CXB3590 cobs the were at ~ 1400mA on a hlg 240h 1400A on the arctic alpine active heatsinks. 5 cobs
And 4 cxbs on the hlg 185h 1400A on the arctics too.
I think they were ~50 watts a cob. MW Apv 12 12 driver for the fans if I recall correctly.
I could get them 6" to 8" away from plants without problems but 1ft 300mm away normally.
Are you getting the Cree cxbs dirt cheap or something...?
A quick Google search gives me ~ £30 €35
Moflow
Well-Known Member
Not much difference. I've run 3000k from veg to flower and the 3500k too
Not really dirt cheap...
42€ for 3500k
52€ for 3000k (guess it's not worth it)
And I'll get the Arctic alpine 11 pro v2, I get for like 10€ in my local dealer, iceled rounding 17€...
Humple
Well-Known Member
Why CXB3590s?
Always wanted to tried them, heard they were very efficient electricity wise.
So you think running 20cobs in a 8x4 tent at a 1.4A I'd be OK? I'm thinking maybe putting 5 COBs more in a future, but 20 to start with.
Humple
Well-Known Member
CXB3590s are no longer the top choice in COBs. You could do better with (cheaper) Luminus CXM22s.
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topcat
Well-Known Member
Keep in mind you will need to drill holes for screws to mount the chip on the Alpines, unless you intend to use adhesive. In that case, they'll be stuck forever. The MechaTronix coolers have holes positioned for many sizes of CoBs. You can tap them, or just use self-tapping screws. To drive 4 fans, choose Mean Well APV-12-12, for 5 fans, choose MW APV-16-12.