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CobKits

CobKits

Well-Known Member
shipping to me this week, shipping to you next week (tues weds ish):
1825 3500k 90cri
1212 3500k 90cri
 
CobKits

CobKits

Well-Known Member
when you want better coverage with more cobs - 1212

when youre on a super budget and cant afford extra heatsinks/holders/reflectors - 1818

apart from that, dollar per dollar they scale pretty similarly.

in other words 1818 costs 50% more but can be run 50% harder at teh same efficiency

(2) 1818 put really close together would be nearly identical to (3)1212 put really close together

also if youre on a budget and need to run much over 50W per cob, 1818 probably better choice
 
SouthCross

SouthCross

Well-Known Member
On the 320h-48A.

There's two adjustments under the rubber plugs. Lo ADJ and Vo ADJ.

Is the 'Lo ADJ' the dimmer? What's the other for?
 
CobKits

CobKits

Well-Known Member
most people vim using current. voltage will dim as well by limiting current. theres no wrong answer :)

really theres no need to adjust anything unless you need to dim. you can trim he voltage down to just above what your array requires for a safety in case you drop a cob but i wouldnt worry about that unless you were running 3 or less cobs per driver
 
SouthCross

SouthCross

Well-Known Member
Hanger is done. Cobs mounted to the sinks. Doubled checked for any shorts. Wired in series. +, - ,+ , -.

Output voltage is 46 off the driver. I didn't adjust the current. Red wire off driver to positive. Black to negative.

Why aint the COBs coming on? Voltage checked at the COBs...46. They're getting power but no worky. Any help?
 
CobKits

CobKits

Well-Known Member
because a 48V driver cant power cobs in series. each cob uses 36-50V depending on model and when you put them in series thats additive so (4) 50V cobs need 200V to light

you need to wire them in parallel with that driver, then all cobs see equal 48-54V
 
N

Nutria

Well-Known Member
CobKits said:
when you want better coverage with more cobs - 1212

when youre on a super budget and cant afford extra heatsinks/holders/reflectors - 1818

apart from that, dollar per dollar they scale pretty similarly.

in other words 1818 costs 50% more but can be run 50% harder at teh same efficiency

(2) 1818 put really close together would be nearly identical to (3)1212 put really close together

also if youre on a budget and need to run much over 50W per cob, 1818 probably better choice
Click to expand...
In a 2.6x2.6ft what could i use?
With 5x1212 @1.4A I get 766ppfd and would go for at least 800ppfd.
With 4x1818 @1.4A = 900ppfd.
Can you help me decide what's the best choice?
 
CobKits

CobKits

Well-Known Member
Nutria said:
In a 2.6x2.6ft what could i use?
With 5x1212 @1.4A I get 766ppfd and would go for at least 800ppfd.
With 4x1818 @1.4A = 900ppfd.
Can you help me decide what's the best choice?
Click to expand...
at 1.4A the 1818s will be more efficient if you can afford it, and cyou can always dim. luminus are at least as good as 1818 and are a little cheaper.
 
SouthCross

SouthCross

Well-Known Member
Raises hand*

What's the operating temperatures of one clu048? How hot do the 120mm sinks get?

Measured with a Fluke 568 IR thermometer. Highest temp recorded was 141°f. Is this temperature within specification tolerance?
 
CobKits

CobKits

Well-Known Member
for those jonesin for the regular H5 1212 gen6 3500k 90 were waiting on, i dont have those yet but i have a stash of below BBL H6 ready to ship. i just got em and havent tested them beside the H5 gen6 but i imagine like gen5 H5 and H6 are within 1% on PAR and a good option. all the datasheets on the page refer to gen5 chips but this was the easiest place to stick em for now

http://cobkits.com/product/citizen-clu048-1212-90cri-h6-below-bbl/
 
SouthCross

SouthCross

Well-Known Member
CobKits said:
ive run them that hot. gen6 can take 120C case temp. 141F is only 70C so your chip is prob 85C at most.
Click to expand...

Adjusting the current to a running 36 volts(50% between the min and max) lowered the sink temps to 101°. The preset as it came was bright.

They're doing good. A hell of a lot better then bands of leds in a box. Plants are off and running.
 
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