Chronikool
Well-Known Member
Cxm22 you mean right..?
Luminus CXM-32 Gen3 the next big thing??
- Thread starter bassman999
- Start date
CobKits
Well-Known Member
i have cxm22 not 32
you want 4 of these:
https://cobkits.com/product/cxm22-light-engine/
and one of these to run at 1050 mA:
https://cobkits.com/product/meanwell-hlg-185h-48a-driver/
(or one of these at 1400)
https://cobkits.com/product/meanwell-hlg-320h-c/
you want 4 of these:
https://cobkits.com/product/cxm22-light-engine/
and one of these to run at 1050 mA:
https://cobkits.com/product/meanwell-hlg-185h-48a-driver/
(or one of these at 1400)
https://cobkits.com/product/meanwell-hlg-320h-c/
Chronikool
Well-Known Member
What drivers did you choose? And what space have you got? Thinking of making a frame for it?Just purchased 8 x CXM22 light engines. May document here as no one else seems to to be.
Thankz for your service so far @CobKits ...awesome stuff.
2017 promises to be green..
Chronikool
Well-Known Member
Running 4 on each frame on a 320-C1400 in seperate 2.8 (80cm) x 2.8 tents. About 300w watts in each.
Yeah.....will smash together a shity frame for sure...
bassman999
Well-Known Member
Im gonna run mine at 700ma (4) per 150 watt driver using 3 drivers. I am an efficiency freak. 12 in a 2'x4' tent and likely dimmed to 300 watts at the wall...25 watts per cob or 476 maRunning 4 on each frame on a 320-C1400 in seperate 2.8 (80cm) x 2.8 tents. About 300w watts in each.
Yeah.....will smash together a shitty frame for sure...
Chronikool
Well-Known Member
I just wanna grow weed...
muleface
Well-Known Member
help me out here, i dont' think im getting the amps part.
so 4 cmx22's at 320-C1400 = 80 watts per 36v cob (but i could run more cobs becuase the voltage is higher)
and 4 cmx22's at 320-C2100 = 80 watts per 36v cob (only 4 cobs because the voltage is around 150)
how do the amps come into play if i only ran 4 cobs on each array
so 4 cmx22's at 320-C1400 = 80 watts per 36v cob (but i could run more cobs becuase the voltage is higher)
and 4 cmx22's at 320-C2100 = 80 watts per 36v cob (only 4 cobs because the voltage is around 150)
how do the amps come into play if i only ran 4 cobs on each array
Silver or lead
Well-Known Member
Heck, you could run two cobs per 120mm pin fin at that wattage.
I'll be running 8@~54watts a piece. I might have went lower in wattage had the 105mm pin fins still been available.
They should be here tomorrow, I have electric conduit here for the framework and just need longer screws for attaching cobs to it.
Chronikool
Well-Known Member
Running in series....and the volts are 50v on the cxm22.
verticalgrow
Well-Known Member
bassman999
Well-Known Member
Me too, but small space or me so ant the most per tf^2 and runnin g them lower with moe cobs means might light and less heat because 2x4x5 tents heat up easy.I just wanna grow weed...
If I was powering a big room with 8ft ceilings I would run at 1400ma and still be more efficient and less heat that HPS
CobKits
Well-Known Member
ok since you guys have been patient... its slow but steady. i made a mount for cobs up top
mounts look like this:
the 3 larger holes fit the ports on the sphere that look like this:
heres a chip mounted on top:
heres the sensor mounting, see that baffle that ensures it only gets reflected light:
CobKits
Well-Known Member
light tight! this is with the cobs lit so faint you can look at the dies. below 1mA, i had to finely adjust voltage to get it like that. This should be just what we were lacking in low-current measurements
front port is handy
can take spectrometer readings without stray light
this 3000K 80 CRI is right on the button, here is low current:
when i cranked the current up it went above 3000K and below 80 CRI, so its prob right on the button for both parameters at a certain nominal current
spectrum of 3000k 80cri with zero stray light, nice and smooth. should be good for calculating QERs (spectrometer outputs raw data in 1 nm increments - easily digitized
heres the par meter on the other side of its range (~110W on a CXM22)
meter ranges to 10000, so like 250-300W, pretty good for our purposes. korad meter is handy as it is programmable, and you can also manually select a current and then safely click it on at that current to get a good temperature independent reading. in a perfect world wed mount thermocouples to each chip's Tc measurement point and/or have isothermal waterblock heatsinks to control Tc but we're gonna walk before we can fly.
If we were a real lab wed use a calibrated full-spectrum detector and be able to quantify actual lumens/watt output but for our purposes calibrating the par meter and working with that is adequate.
front port is handy
can take spectrometer readings without stray light
this 3000K 80 CRI is right on the button, here is low current:
when i cranked the current up it went above 3000K and below 80 CRI, so its prob right on the button for both parameters at a certain nominal current
spectrum of 3000k 80cri with zero stray light, nice and smooth. should be good for calculating QERs (spectrometer outputs raw data in 1 nm increments - easily digitized
heres the par meter on the other side of its range (~110W on a CXM22)
meter ranges to 10000, so like 250-300W, pretty good for our purposes. korad meter is handy as it is programmable, and you can also manually select a current and then safely click it on at that current to get a good temperature independent reading. in a perfect world wed mount thermocouples to each chip's Tc measurement point and/or have isothermal waterblock heatsinks to control Tc but we're gonna walk before we can fly.
If we were a real lab wed use a calibrated full-spectrum detector and be able to quantify actual lumens/watt output but for our purposes calibrating the par meter and working with that is adequate.
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CobKits
Well-Known Member
so lets break it in with a couple of quick runs
im gonna go out on a limb just by the look of the curves and say that the spot measurements i was doing previously werent too far off. but this is better as it is absolute. provided the ambient temperature is similar and i do a similar method of current ramping and datalogging, i can measure a few cobs today, one tomorrow, three next week and they should all be repeatable and absolute relative to one another as the sphere geometry is fixed, and theres nothing like sensor and chip placement, time of day/room brightness, color of pants im wearing, etc to affect the PAR readings. At this point, while were not really to the standards of a lab, i feel the accuracy is approaching or has exceeded the variability between individual chips from a bin/lot, and is as good as were gonna get for making relative generalizations about the performance of a chip series. That would be a separate test worth doing- pulling 3 or more chips from a lot and running them to see how variable a given bin/lot is.
So what use is this data?
lets compare 2 chips at a fixed efficacy:
a $12 1212 can get you just under 30W at that efficacy
a $17 CXM22 can get you 48W (61% more power) but only costs 42% more than a 1212
remember from previous tests 1212 was the heavyweight leader in PAR/$ at a given efficiency- you just needed to use a lot of them. Here we are getting a scale up at better-than-1212 economics to a more practical sized chip
The economics look stronger when you consider cost of holder, reflector, heatsink, mounting time, etc. Discrete heatsinks will always favor larger chips in installed cost
im gonna go out on a limb just by the look of the curves and say that the spot measurements i was doing previously werent too far off. but this is better as it is absolute. provided the ambient temperature is similar and i do a similar method of current ramping and datalogging, i can measure a few cobs today, one tomorrow, three next week and they should all be repeatable and absolute relative to one another as the sphere geometry is fixed, and theres nothing like sensor and chip placement, time of day/room brightness, color of pants im wearing, etc to affect the PAR readings. At this point, while were not really to the standards of a lab, i feel the accuracy is approaching or has exceeded the variability between individual chips from a bin/lot, and is as good as were gonna get for making relative generalizations about the performance of a chip series. That would be a separate test worth doing- pulling 3 or more chips from a lot and running them to see how variable a given bin/lot is.
So what use is this data?
lets compare 2 chips at a fixed efficacy:
a $12 1212 can get you just under 30W at that efficacy
a $17 CXM22 can get you 48W (61% more power) but only costs 42% more than a 1212
remember from previous tests 1212 was the heavyweight leader in PAR/$ at a given efficiency- you just needed to use a lot of them. Here we are getting a scale up at better-than-1212 economics to a more practical sized chip
The economics look stronger when you consider cost of holder, reflector, heatsink, mounting time, etc. Discrete heatsinks will always favor larger chips in installed cost
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Chronikool
Well-Known Member
Lookz like i made a good purchase. Cant wait to put them to work.
Great work @CobKits
Citizen COB Architecture 1818