Matching Drivers and COBs

CobKits

CobKits

Well-Known Member
muleface said:
the newer version.

they appear to have half the light output of 3950

6227 vs 12134
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not sure where you are getting those numbers from but make sure to compare similar color and cri chips at a similar wattage

i see that CB bin is nominal 12134 lumens but cree does not make a 90 cri 3500k CB bin chip and if they did are you looking to run it at 88 watts and compare it to a 90 cri 3500k citi? you could get that kind of output running the citi out to 120W but thats like 3 examples of apples and oranges.

best to decide on the operating conditions you want including
# of fixtures
flux density
efficiency

then work with that to narrow the field. there are literally hundreds of chips that can produce 12134 lumens but photons are photons so you need to decide what your other criteria is. for the vast majority of people cost is in fact in the equation
 
muleface

muleface

Well-Known Member
CobKits said:
not sure where you are getting those numbers from but make sure to compare similar color and cri chips at a similar wattage

i see that CB bin is nominal 12134 lumens but cree does not make a 90 cri 3500k CB bin chip and if they did are you looking to run it at 88 watts and compare it to a 90 cri 3500k citi? you could get that kind of output running the citi out to 120W but thats like 3 examples of apples and oranges.

best to decide on the operating conditions you want including
# of fixtures
flux density
efficiency

then work with that to narrow the field. there are literally hundreds of chips that can produce 12134 lumens but photons are photons so you need to decide what your other criteria is. for the vast majority of people cost is in fact in the equation
Click to expand...
For clarity purposes, I am very green in this field. My "money is no object" question was really more about probing for a ideal setup for a 4x4 space, without a cost consideration. I have spent a lifetime tripping over the saving a buck today concept only to get bit tomorrow. Like buying a $6 drill bit, getting half the job done, driving back to the store for a second one, when a $9 drill bit would have done the job in 1 pass.

So you are thinking maybe 16 1212's running on 2x HLG-240H-c700. Let me know if my math is off on this...
 
sixstring2112

sixstring2112

Well-Known Member
muleface said:
For clarity purposes, I am very green in this field. My "money is no object" question was really more about probing for a ideal setup for a 4x4 space, without a cost consideration. I have spent a lifetime tripping over the saving a buck today concept only to get bit tomorrow. Like buying a $6 drill bit, getting half the job done, driving back to the store for a second one, when a $9 drill bit would have done the job in 1 pass.

So you are thinking maybe 16 1212's running on 2x HLG-240H-c700. Let me know if my math is off on this...
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my first question would be what can i see grown under this type of setup with the cheap 1212? if we are only making purchases based on data sheets fuck it,go with a gavita 6/750 over a 4x4 you will be hitting 1000umols @ 95% eff and 20% under a 1000w hid in running costs.
http://growershouse.com/gavita-pro-600-750e-flex-de-120-240v-fixture
 
muleface

muleface

Well-Known Member
sixstring2112 said:
my first question would be what can i see grown under this type of setup with the cheap 1212? if we are only making purchases based on data sheets fuck it,go with a gavita 6/750 over a 4x4 you will be hitting 1000umols @ 95% eff and 20% under a 1000w hid in running costs.
http://growershouse.com/gavita-pro-600-750e-flex-de-120-240v-fixture
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i suppose that is an option, however this is going in a 4x4x7 grow tent, so it might burn my house down. So that technically would give me really high par value, but only briefly.
 
sixstring2112

sixstring2112

Well-Known Member
muleface said:
i suppose that is an option, however this is going in a 4x4x7 grow tent, so it might burn my house down. So that technically would give me really high par value, but only briefly.
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all im saying is what kind of plants will we get using those citi 1212 chips? somewhere i saw if money wasnt an issue,well then...get the proven chips.cree 3590.and for a 4 x 4 x 7 get 12 or 16 of them.12 x 3590 @ 1400ma would rock out the 4 x 4 no doubt in my mind.
 
PhotonFUD

PhotonFUD

Well-Known Member
nxsov180db said:
That's exactly what I am doing right now on a larger scale, well I'm in the build process anyways.. I've got 96x 3500k 1212's and 12x HLG-320H-36A's (would have liked to have the B version but they were out of stock). You get a little over 40 watts/cob turned all the way up, I am getting just shy of 340 watts per driver output/365 watts input, about 93% efficiency. I wish I could have gotten 24x HLG-180H-36B's or A's I could buy them for a similar cost as 12x 320's but they weren't in stock and I can't wait...
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With that many and what you are running, do you have/use a PAR meter? It would be interesting how uniform the light over the area is.
 
CobKits

CobKits

Well-Known Member
those are good, one gen behind the current MQ series in linearity which is fine for visible light but will bias LED measurements pretty significantly. if doing mono measurements you can correct vs the curve they give for that sensor
 
PhotonFUD

PhotonFUD

Well-Known Member
muleface

muleface

Well-Known Member
knigbrite does have the gen 7 Vero 29's in right now, they are 4000k, you could mix them with some other brand of 3000k's and be the first kid on your block to be running them.

they are priced at $24.50 plus shipping
 
R

RackEmUp

Member
Hi everyone. Great website..thank you for the time and effort. I've done a lot of reading on here but I'm still trying to understand a general principle regarding volts. If outlets in the US are 120v, how are people running 4 or more vero 29's in series for instance when their forward voltage is around 37v per cob? I'm missing something.
 
ttystikk

ttystikk

Well-Known Member
RackEmUp said:
Hi everyone. Great website..thank you for the time and effort. I've done a lot of reading on here but I'm still trying to understand a general principle regarding volts. If outlets in the US are 120v, how are people running 4 or more vero 29's in series for instance when their forward voltage is around 37v per cob? I'm missing something.
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Yes sir, you are missing this thing called a 'driver'. It acts like a ballast in that it converts house/commercial AC current into the DC current your chips will need. Take care to get a good match between the needs of the chips and the output of the driver to ensure proper operation and efficiency.
 
bassman999

bassman999

Well-Known Member
RackEmUp said:
Hi everyone. Great website..thank you for the time and effort. I've done a lot of reading on here but I'm still trying to understand a general principle regarding volts. If outlets in the US are 120v, how are people running 4 or more vero 29's in series for instance when their forward voltage is around 37v per cob? I'm missing something.
Click to expand...
As @ttystikk said drivers have 2 voltages to consider input voltage AC(from the wall) and output voltage to cobs/led measured in DC
 
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