Luminus CXM-32 Gen3 the next big thing??
- Thread starter bassman999
- Start date
bassman999
Well-Known Member
thanks
Warpedpassage
Well-Known Member
I have to admit im a bit confused. I could have sworn I read elsewhere you had written that the cxm would be comparable to cree3590 around 50% efficiency at 50ish watts. And on your site the citi1825s are listed as having near 60% efficiency. So i assumed that citis would be the way to go.
CobKits
Well-Known Member
well lets take a look at the datasheets ( 3000k 80 cri all cobs at 85C):
at 50W
cxb3590 = 139 lm/W
clu048-1212 = 142 lm/W
cxm22 = 147 lm/W
clu048-1818 = 150 lm/W
clu058-1825 = 163 lm/W
but with all the different chip sizes and thermal profiles its not actually
3590<1212<cxm22<1818<1825
more like in real world at a fixed cooling capacity and lower Tj
1212<3590<1818<cxm22<1825
with the last 4 separated by just a few percent and the middle 3 at a pretty close heat
i think im going to remove all references to efficiency on my site, its a stupid metric. too many variables between thermal management, current, color temp, etc etc, its basically meaningless. but as long as people still believe cxb is 56% efficient, its a reference point
the takeaway is that IF 3500k CXB3590 is 56% efficient (as was claimed once upon a time), then relatively clu058-1825 is about 60% efficient
its all relative
at 50W
cxb3590 = 139 lm/W
clu048-1212 = 142 lm/W
cxm22 = 147 lm/W
clu048-1818 = 150 lm/W
clu058-1825 = 163 lm/W
but with all the different chip sizes and thermal profiles its not actually
3590<1212<cxm22<1818<1825
more like in real world at a fixed cooling capacity and lower Tj
1212<3590<1818<cxm22<1825
with the last 4 separated by just a few percent and the middle 3 at a pretty close heat
i think im going to remove all references to efficiency on my site, its a stupid metric. too many variables between thermal management, current, color temp, etc etc, its basically meaningless. but as long as people still believe cxb is 56% efficient, its a reference point
the takeaway is that IF 3500k CXB3590 is 56% efficient (as was claimed once upon a time), then relatively clu058-1825 is about 60% efficient
its all relative
sixstring2112
Well-Known Member
sphere # on those 5 chips yet ?
sixstring2112
Well-Known Member
When you gunna give us the hard data from your sphere holmes? We already know all these companies like to "play with" the numbers a lil to favor their product
Fastslappy
Well-Known Member
got my CXM22's from cobkits be building all week
Show us the build when you're done!
welight
Well-Known Member
It seems remiss to omit Vero29C Gen7
85C 50 watts 175LPW, more than just a player
29B 157LPW
29D 151LPW
Cheers
Mark
CobKits
Well-Known Member
yet its no brighter than an 1825 in real testing. i think all bets are off when running them as soft as we do. thermal efficiency seems to play a large part in why all these chips are within a few percent of each other in efficacy at 30-50W real world with the same cooling
im eager to get these in the sphere and see if the trends are similar to the 12" spot tests
i wasnt dissing vero was just addressing the cobs he asked about. hard to put 1825 in there without 1212 and 1818 for reference (in my brain at least)
muleface
Well-Known Member
so I want to fill a 4x8 tent with lights, I currently have 8 vero 29 gen 7s running at 80 watts each, i also have 22 - 4ft 22 watt 6500k t5 LED integrated lights. I am looking to grow tomatoes and peppers. I know the cobs will work, but would adding the t5s give me any benefit? I am thinking that 8 cobs in a 4x8 isn't enough light for that space, so Im thinking supplementing it with the 22w t5s might round out the space. Thoughts?
Warpedpassage
Well-Known Member
Appreciate the clarification. I think im finally getting my head around this.
CobKits
Well-Known Member
t5s a re a huge step backwards,at 80-90 lm/W they are just over half the efficiency of cobs run soft. better to run your veros harder instead. even at their limit they are over 120 lm/W
muleface
Well-Known Member
I already have the cobs, The 8 vero 29 cobs are running on 2 - HLG-320H-C2100, so they are putting out about 80 watts each, what i was asking was is there any benefit to adding some 6500k leds to the mix. The light bars are running at 22 watts and are giving me about 110lm/w.
My thought here is that i could get a better distribution of light, but i'm unsure on how my plants will react to the extra light coming in at 6500k. My cobs are a mix of 3000k and 4000k. I couldn't get my hands on the 3500k veros. I thought i read that you ran 4 cobs at 50 watts in a 3x3 and got great results. So I figured if I was running at 4x80 watts in a 4x4 adding a little extra light would get me a better distrubution and all the light i needed. Maybe run this at about 24 inchs above the canopy.
My original setup had all 8 cobs running in a 4x4 space.
I was hoping you would chime in on this.
CobKits
Well-Known Member
75W, it was 4 1825 on an hlg 320