COB Manufacturers other than CREE or BRIDGELUX

Which led brand /manufacturer do you use ?

  • cree

    Votes: 98 58.0%

  • bridgelux

    Votes: 48 28.4%

  • sharp

    Votes: 1 0.6%

  • osram

    Votes: 4 2.4%

  • nichia

    Votes: 9 5.3%

  • toyonia

    Votes: 0 0.0%

  • citizen

    Votes: 32 18.9%
  • Total voters
    169
ttystikk

ttystikk

Well-Known Member
loftygoals said:
CLU046-1212

220x 3500k 90CRI - 36V (34-37V)
30x 5000k 80CRI - 36V (34-37V)

I already had 6x Meanwell HLG600h-36a drivers with 95.5% efficiency so these are perfect.

Price? 650 euros for 250 cobs delivered. 2.6 euros each :D How could I turn em down?!
Click to expand...
Now I'm going to watch and see how you keep them all cool.
 
Airwalker16

Airwalker16

Well-Known Member
loftygoals said:
CLU046-1212

220x 3500k 90CRI - 36V (34-37V)
30x 5000k 80CRI - 36V (34-37V)

I already had 6x Meanwell HLG600h-36a drivers with 95.5% efficiency so these are perfect.

Price? 650 euros for 250 cobs delivered. 2.6 euros each :D How could I turn em down?!
Click to expand...
For reals for reals. That's hella cheap! You gotta gets to buildin!
 
Airwalker16

Airwalker16

Well-Known Member
loftygoals said:
CLU046-1212

220x 3500k 90CRI - 36V (34-37V)
30x 5000k 80CRI - 36V (34-37V)

I already had 6x Meanwell HLG600h-36a drivers with 95.5% efficiency so these are perfect.

Price? 650 euros for 250 cobs delivered. 2.6 euros each :D How could I turn em down?!
Click to expand...
So you running each one at 7.2watts I can never figure out those meanwells. Cc/cv.
 
loftygoals

loftygoals

Well-Known Member
Airwalker16 said:
So you running each one at 7.2watts I can never figure out those meanwells. Cc/cv.
Click to expand...
I'm gonna be running 30 chips per 600w driver... so 180 chips initially. Hope to have that all built within 2-3 weeks.

Another 32 are going to be side lighting which I'll probably take a few months to get finished as I just have rough designs in my head. The 30x 5000k are going to go in my veg room which is the lowest priority as I already have 450w of chinese COBs in there working well enough. So I've got 8 chips spare.

600W @ 36V = 16.7A
16.7A / 30 chips = 0.56A each
0.56A x 36V = 20w each
 
ttystikk

ttystikk

Well-Known Member
loftygoals said:
I'm gonna be running 30 chips per 600w driver... so 180 chips initially. Hope to have that all built within 2-3 weeks.

Another 32 are going to be side lighting which I'll probably take a few months to get finished as I just have rough designs in my head. The 30x 5000k are going to go in my veg room which is the lowest priority as I already have 450w of chinese COBs in there working well enough. So I've got 8 chips spare.

600W @ 36V = 16.7A
16.7A / 30 chips = 0.56A each
0.56A x 36V = 20w each
Click to expand...
VERY nice- can't wait to see what you cook up with them!
 
Airwalker16

Airwalker16

Well-Known Member
loftygoals said:
I'm gonna be running 30 chips per 600w driver... so 180 chips initially. Hope to have that all built within 2-3 weeks.

Another 32 are going to be side lighting which I'll probably take a few months to get finished as I just have rough designs in my head. The 30x 5000k are going to go in my veg room which is the lowest priority as I already have 450w of chinese COBs in there working well enough. So I've got 8 chips spare.

600W @ 36V = 16.7A
16.7A / 30 chips = 0.56A each
0.56A x 36V = 20w each
Click to expand...
Or 600w / 30 chips.... =
20 watts per... just sayin..
 
S

Shugglet

Well-Known Member
loftygoals said:
I'm gonna be running 30 chips per 600w driver... so 180 chips initially. Hope to have that all built within 2-3 weeks.

Another 32 are going to be side lighting which I'll probably take a few months to get finished as I just have rough designs in my head. The 30x 5000k are going to go in my veg room which is the lowest priority as I already have 450w of chinese COBs in there working well enough. So I've got 8 chips spare.

600W @ 36V = 16.7A
16.7A / 30 chips = 0.56A each
0.56A x 36V = 20w each
Click to expand...
Am I to understand you plan on wiring them in parallel? I thought this was a big no-no with LEDs in general and even more so when dealing with COBs?
 
loftygoals

loftygoals

Well-Known Member
Shugglet said:
Am I to understand you plan on wiring them in parallel? I thought this was a big no-no with LEDs in general and even more so when dealing with COBs?
Click to expand...
Not really a no-no in all cases.

The issue is... What happens if one COB dies? What happens if more than one dies? The extra current gets redistributed amongst all the remaining COBs. Can the others handle it? Is there enough headroom?

In my case the CLU046 COBs have a max wattage rating of 117.5w. Let's call that 100w to be generous.

I'm running 30 COBs at 600w (so 20w each).

So you can see there's enough headroom to kill more than 24 chips out of 30 before I run into issues with each chip exceeding max power input from the driver. If 25 died then we'd have each remaining COB running at 120w.
 
bassman999

bassman999

Well-Known Member
I run my Cree chips in parallel without issues so far.
There is the possibility that one chip may have lower esr (is that the right term?)than the next.
What that means is if 6 chips share 240 watts each would get 40 watts each, but in reality some might get 42w or 38w for example
When under driven they are no where close to stress, but there might be some slight efficiency decrease with parallel over series in this regard.

My main gripe with parallel wiring is the wiring itself is more labor intensive.
 
welight

welight

Well-Known Member
The issue with parallel is each led typically has a slightly different forward voltage, this does not reveal itself in Series configure, but it does in parallel meaning the brightness level(or PPFD) from chip to chip can vary, you have to counter this using balancing resistors or current mirrors
Cheers
Mark
 
S

Shugglet

Well-Known Member
loftygoals said:
Not really a no-no in all cases.

The issue is... What happens if one COB dies? What happens if more than one dies? The extra current gets redistributed amongst all the remaining COBs. Can the others handle it? Is there enough headroom?

In my case the CLU046 COBs have a max wattage rating of 117.5w. Let's call that 100w to be generous.

I'm running 30 COBs at 600w (so 20w each).

So you can see there's enough headroom to kill more than 24 chips out of 30 before I run into issues with each chip exceeding max power input from the driver. If 25 died then we'd have each remaining COB running at 120w.
Click to expand...
Ahh makes sense. I was wanting to run 4 Vero 29s off that particular driver at ~4.2a each but decided against it lol.

Just sad theres nothing out there really to drive multiple COBs at high amperage.
 
Airwalker16

Airwalker16

Well-Known Member
Shugglet said:
Ahh makes sense. I was wanting to run 4 Vero 29s off that particular driver at ~4.2a each but decided against it lol.

Just sad theres nothing out there really to drive multiple COBs at high amperage.
Click to expand...
Sure there is. Hlg320's and Pairui 400's. Series wiring. ConstantCurrent drivers. Available in 2100,2800,3100,3800,4800 amperages or something like that.
 
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