Luminus CXM-32 Gen3 the next big thing??

S

Silver or lead

Well-Known Member
bassman999 said:
I think most cobs will beat HPS when just run at their nominal spec'd current, but the lower the better in my book
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I guess they may be but I don't know. I also don't have a computer hooked up to the net so I don't get to play with the fancy spreadsheets and calculators to find out myself.

A hortilux bulb is ~145lm/w, I'm running 1212s a 25w which from what I have read is about 160lm/w but go down in efficiency with more watts fairly quickly from what I've seen in the posted charts.

I just want to make sure I'm beating that hortilux because if you are not doing that then cobs lose a lot of their advantages IMHO.
 
bassman999

bassman999

Well-Known Member
Silver or lead said:
I guess they may be but I don't know. I also don't have a computer hooked up to the net so I don't get to play with the fancy spreadsheets and calculators to find out myself.

A hortilux bulb is ~145lm/w, I'm running 1212s a 25w which from what I have read is about 160lm/w but go down in efficiency with more watts fairly quickly from what I've seen in the posted charts.

I just want to make sure I'm beating that hortilux because if you are not doing that then cobs lose a lot of their advantages IMHO.
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Other advantage with cobs is even light spread, and no need to be 3ft above plants etc...

Not to mention that HPS has more green and that spectrum is counting toward their 145 lm/w and its not doing much good, so if that was subtracted from the equation I think they wouldnt look as good on paper.

I borrowed this from Cobkits site



3000K is 149 lm/w @35 or so watts 160 lm/w at 25 watts seems easily achievable

Also those measurements are at 85*C so with lower temps you will be even brighter.
I run passive and keep around 30*C with ambient of 75-79*F
 
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CobKits

CobKits

Well-Known Member
Chronikool said:
Hey @CobKits ....

Thoughtz on 4 of these run on a HLG-320H-C1400 Driver over a 2.8 (80cm) x 2.8...about 300w yeah...??

Thankz...
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you bet. i did the same setup with 4 1825s in a 3x3 and it rocked. the cxm22s actually run a slightly higher voltage and fill out the driver better. a CXM22 rig vs that 1825 rig would put out about the same PAR (ever so slightly higher actually) and use a scant 8W more (73W per cob vs 71). not a bad deal to save $100 on the 4 chips and have better reflector options
 
CobKits

CobKits

Well-Known Member
Silver or lead said:
I guess they may be but I don't know. I also don't have a computer hooked up to the net so I don't get to play with the fancy spreadsheets and calculators to find out myself.

A hortilux bulb is ~145lm/w, I'm running 1212s a 25w which from what I have read is about 160lm/w but go down in efficiency with more watts fairly quickly from what I've seen in the posted charts.

I just want to make sure I'm beating that hortilux because if you are not doing that then cobs lose a lot of their advantages IMHO.
Click to expand...
its all about the spectrum. good blurples are equal to hps on actual usable par but look like crap on lumens.

hps has a ton of yellow which is good but not as good as strong red and blue like a warm white phosphor cob
 
S

Silver or lead

Well-Known Member
CobKits said:
its all about the spectrum. good blurples are equal to hps on actual usable par but look like crap on lumens.

hps has a ton of yellow which is good but not as good as strong red and blue like a warm white phosphor cob
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You two are selling ice to an Eskimo, lol, an educated guess would have been good enough.
 
muleface

muleface

Well-Known Member
So i'm building out the 2nd half of my grow tent. I already have 8 cobs running at 80 watts each on one side. I'm thinking about getting 4 of the CXM-32s. Then spreading out the existing 8 lights so there are 12 cobs total in a 4x8 space. currently i have 4 3000k and 4 4000k, any thoughts on what color i should get? I thought maybe 5000k and spread the spectrum around a bit. That would get me around 480 watts per side.

thoughts?
 
muleface

muleface

Well-Known Member
Chronikool

Chronikool

Well-Known Member
CobKits said:
you bet. i did the same setup with 4 1825s in a 3x3 and it rocked. the cxm22s actually run a slightly higher voltage and fill out the driver better. a CXM22 rig vs that 1825 rig would put out about the same PAR (ever so slightly higher actually) and use a scant 8W more (73W per cob vs 71). not a bad deal to save $100 on the 4 chips and have better reflector options
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oh really..? Lovely! How was your yield? Scrog? Number of plantz..? Thanks :)
 
Warpedpassage

Warpedpassage

Well-Known Member
Howdy cobkkits,

Do u think the 1825s running at 50 watts will give higher efficiency than the cxm22s(more usable photons than heat per watt)? If so, by how much? Im not particulary concerned with cost, its going to be utilized for a small personal grow, only 300 watts. Im planning on grabbing the engines from you in a few weeks.



Many thanks.
 
Warpedpassage

Warpedpassage

Well-Known Member
Glad i asked. Cobby, last question, how do you feel abut lenses with the cxm22s? apologies if this has been covered elsewhere.
 
bassman999

bassman999

Well-Known Member
CobKits said:
thats the identical number that the vero excel simulator returns for the 85C hot-binning test conditions listed on the digikey spec

View attachment 3847759

at same wattage and case temp, according to the calculators
1825= 144 lm/W
3618 = 145 lm/W
cxm 22= 120 lm/W
cxm 32= 145 lm/W
vero B 50V= 140 lm/W
vero D 36V=130 lm/W
cxb3590 = ~ 105 lm/W
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What wattage were they calculated at?
 
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