12 COB, what amperage?

Moflow

Moflow

Well-Known Member
topcat said:
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.
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A right pain with cobs
What price are those MechaTronix coolers?
 
S

Skinny.g

Member
Humple said:
CXB3590s are no longer the top choice in Cobs. You could do better with (cheaper) Luminus CXM22s.
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The COBs are 20€, that's half a price I will have a look see if I can find the holder, reflector...
Do you really advice me skipping the famous cxb3590? My main point big yields with minimum electricity expense. How many cxm22s wd u put for a 8x4?
 
Moflow

Moflow

Well-Known Member
Skinny.g said:
The COBs are 20€, that's half a price I will have a look see if I can find the holder, reflector...
Do you really advice me skipping the famous cxb3590? My main point big yields with minimum electricity expense. How many cxm22s wd u put for a 8x4?
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Yes
 
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Skinny.g

Member
How many luminus for a 8x4? What amperage? All my life researching for the cxbs now I need to start all over
Cxm22 or 32
 
Humple

Humple

Well-Known Member
Skinny.g said:
The COBs are 20€, that's half a price I will have a look see if I can find the holder, reflector...
Do you really advice me skipping the famous cxb3590? My main point big yields with minimum electricity expense. How many cxm22s wd u put for a 8x4?
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For an 8x4 I would probably do 16 CXM22s at 75 watts per COB. Should be a reasonably good balance of price-to-performance if you're on a budget.

The famous CXB3590 is old news, man. I'm not saying it isn't still a great COB with potential for great efficiency, but it is way overpriced, especially considering how much competition there is now. Cree has been lazy on that front, allowing other manufacturers to slide in and offer much better options.
 
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Skinny.g

Member
Let me just get it right, other manufacturers offers the same at better price, which translates into a better deal.
But these manufacturers are not BETTER than Cree... Right?
 
Humple

Humple

Well-Known Member
Skinny.g said:
Let me just get it right, other manufacturers offers the same at better price, which translates into a better deal.
But these manufacturers are not BETTER than Cree... Right?
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What do you mean by better? It depends entirely on what you need. Cree is still a top player in LED, and probably always will be, but for DIY COB grow lighting, they just aren't competitive. Cree, Luminus, Bridgelux, and Citizen (the Big Four in COBs) are all highly regarded manufacturers that make quality components.
 
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Skinny.g

Member
Humple said:
What do you mean by better? It depends entirely on what you need. Cree is still a top player in LED, and probably always will be, but for DIY COB grow lighting, they just aren't competitive. Cree, Luminus, Bridgelux, and Citizen (the Big Four in COBs) are all highly regarded manufacturers that make quality components.
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What I need... Is to pay a big capital in the beginning, so I will get my money back every month with the electricity bill (as I will use this instead of HPS) so I wouldn't mind paying a bit more if a get a more efficient product.
 
Humple

Humple

Well-Known Member
Skinny.g said:
What I need... Is to pay a big capital in the beginning, so I will get my money back every month with the electricity bill (as I will use this instead of HPS) so I wouldn't mind paying a bit more if a get a more efficient product.
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If you properly implement the CXM22s, the CXB3590s are not going to be the more efficient product. Efficiency is a big picture, and though the 3590s can beat the 22s at certain current levels, at others, the 3590s lose. When you then factor in the far better cost of the Luminus COBs, it's an obvious choice - go Luminus.

But for maximum efficiency, I wouldn't be looking at COBs in the first place. Mid-power diode based strips from Samsung or Bridgelux would be my choice.
 
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Skinny.g

Member
Humple said:
If you properly implement the CXM22s, the CXB3590s are not going to be the more efficient product. Efficiency is a big picture, and though the 3590s can beat the 22s at certain current levels, at others, the 3590s lose. When you then factor in the far better cost of the Luminus COBs, it's an obvious choice - go Luminus.

But for maximum efficiency, I wouldn't be looking at COBs in the first place. Mid-power diode based strips from Samsung or Bridgelux would be my choice.
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Humple, thank you for everything, I'm looking at the
CXM-22-35-80-36-AC10-F3-3
Just 12€ a piece, this would make my investment way cheaper, lol.
What amperage do you recommend?
PD I've heard about lm301B diodes but I don't really get into it...
 
Humple

Humple

Well-Known Member
Skinny.g said:
Humple, thank you for everything, I'm looking at the
CXM-22-35-80-36-AC10-F3-3
Just 12€ a piece, this would make my investment way cheaper, lol.
What amperage do you recommend?
PD I've heard about lm301B diodes but I don't really get into it...
Click to expand...
For roughly 70-75 watts per COB, I'd say somewhere around 1.4-1.5 amps. Are you planning to wire in series or in parallel? Personally, I'd go parallel, as it gives you more options. I'd probably do one HLG-320H-48AB (or 240H-48AB if money is tight) for every four COBs.
 
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Skinny.g

Member
I was planning on going with a Hlg240 1400B with 4 COBs.
BTW, do the clu048 and Cxm22 share the solderless conector??
I'll try and go with parallel...
PD: why is a 320 better than a 240 if is just 4 COBs on it? 320 is 25bucks more expensive, on 5 drivers is 125bucks more... Is it worth it?
 
Humple

Humple

Well-Known Member
Skinny.g said:
I was planning on going with a Hlg240 1400B with 4 COBs.
BTW, do the clu048 and Cxm22 share the solderless conector??
I'll try and go with parallel...
PD: why is a 320 better than a 240 if is just 4 COBs on it? 320 is 25bucks more expensive, on 5 drivers is 125bucks more... Is it worth it?
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The 320 just gives you more headroom in case you ever want more power, but the 240s will be just fine.

Yes, you can use the Ideal holder for both the CLU048 and the CXM22.
 
Boatguy

Boatguy

Well-Known Member
Airwalker16 said:
Dude.. use quantum Boards or STRIPS!! COBS take a loooot of time to get mounted up. Extra costs for holders, tiny screws. Bleh
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Come on...
Drill and tap two holes, and solder two wires to contacts. Literally 5 minutes. Holders are a waste of time and money
Thermal tape cuts out the drilling and tapping if you dont feel like it
 
Airwalker16

Airwalker16

Well-Known Member
Boatguy said:
Come on...
Drill and tap two holes, and solder two wires to contacts. Literally 5 minutes. Holders are a waste of time and money
Thermal tape cuts out the drilling and tapping if you dont feel like it
Click to expand...
With the amount of targeted heat that flows out of a Cob, I really dont think thermal Tape is gonna hold up.
 
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