Airwalker16
Well-Known Member
Why? Run them at 1750 on 2 240h-c1750b's.
Matching Drivers and COBs
- Thread starter SupraSPL
- Start date
for someone that burns out their cobs I wouldn't be giving advice
VegasWinner
Well-Known Member
I am designing the fixtures to operate at a 56% efficiency. More photons is better growth, not more watts. I also remotely mount the LED Driver, as well to further reduce heat gain. I will be setting up a two CoB CXA3590 36v, 5000k, 145w, CD bin with a 240H-C2100, 2.1 Amps vs 1.4 Amps to see if I can drive the CoB's a little harder and still get good photon's as well. But that is another issue. I have two CXA3590's 72v, 135w, 5000k CD bin with a C1400, 1.4 Amps and I expect two hundred watts and some nice growth potential with another 56% efficiency.
ttystikk
Well-Known Member
I run the same 4 CXB3590 @50W apiece as many others here do, to get the same 56% efficiency. My drivers don't get appreciably warm. I'm running 24 modules like this vertically in front of 144sq ft, to maximize production per square foot.
bicit
Well-Known Member
How much space are you trying to cover?
VegasWinner
Well-Known Member
I am learning fast. thanks
VegasWinner
Well-Known Member
I have also modified my veg light to 4-CXA3590, 72v, 135w, 5000K and C700B for the same effect and an efficiency of 64% from a 2-CXA3590, 72v, 135w, 5000K and C1400.. should be great for vegging. I increased my heat sink to double and mount them side by side for a 12x12 footprint in a 2x2 tent. should be excellent coverage. also have reflectors lidel angelinna's to increase lumens with the same wattage by 15%. Adding reflector's to the 8-CXB3590's as well. in a 2x3 tent
ttystikk
Well-Known Member
That's a badass setup for off the grid growing, brother.
ttystikk
Well-Known Member
On what?
STRAIGHT FROM CREE TODAY:
DB BIN 4000K CXB3590 are available now
DB BIN 3500K CXB3590 have no part number assigned as yet. Once they do, a prepaid order will be filled in about 5 weeks or less.
ttystikk
Well-Known Member
The answer is yes, they're working their way down the spectrum. No word on availability as yet.
BOBBY_G
Well-Known Member
there it was. fast moving thread, glad i wasnt going crazy
VegasWinner
Well-Known Member
3x3
welight
Well-Known Member
ttystikk
Well-Known Member
I'M stoked! I wanna use them at 75W each, I bet the efficiency would basically match the CD bin at 50W.
BOBBY_G
Well-Known Member
more like @ 60W the DB would be as efficient on lumens/w as 50W CD. same DB run at 50W would be ~5% more efficient than CD
im assuming current CDs are toward the top half of their bin spec and the new DBs are toward the bottom half of their bin spec for now
even a "full" bin jump would be about 7-8% going from say 12500 to 13500 lumens
im assuming current CDs are toward the top half of their bin spec and the new DBs are toward the bottom half of their bin spec for now
even a "full" bin jump would be about 7-8% going from say 12500 to 13500 lumens
ttystikk
Well-Known Member
The bin jump happens when AVERAGE chip specifications increase by 1000 lumens. Therefore the bin jump is over 8%, from 12k to 13k lumens/watt. This is how it was explained to me, at least.
Such is why I'm optimistic that chips run at 75W can be as efficient as the current bin at 50W. Even if they aren't, the difference will be less than 3%, well inside a margin for error. The actual performance boost might therefore be only 48% instead of the full fifty, but I'm more than happy to get the extra light. It will cost less too, since I'm buying half the number of drivers. Both factors will contribute to a cost per watt that's only 2/3 of what I'm paying now.
That's amazing improvement in only 6 months. Yes, I know it's due in large part to my configuration change, I'm still thrilled at how things are progressing.
BOBBY_G
Well-Known Member
arrggh.. stupid firefox i just typed for 20 minutes and it crashed
ok will try again
let assume improvements are incremental and there isnt one magic 8% tweak but they are constantly improving things by a fraction of percent (raw materials, manufacturing process, thermal dissipation, junctions, diodes, etc). as these improvements prove themselves they integrate them into their process
improvements would be constant and small in nature
lets revisit what bins are - a post-manufacturing sorting of chips by flux. its not like today they are making 100% CD bin and are switching the production to 100% DB bin next month. remember there are multiple markets:
top bin: dorks like us who will pay premium for efficiency
mid bin: porch light manufacturers who need a consistent product but are price sensitive
low bin: cheap chinese companies that dont care about product quality but want the cree name. cree prob treads lightly in this market and pitches chips before selling them to certain people
so their profile of bins is prob somehting more like:
lets say last year they manufactured 3500k chips and each 100 lot had
15 CD
60 CB
25 BD
6 mos ago it was something like
5 DB
50 CD
40 CB
5 BD
now its something like
25 DB
50 CD
25 CB
so... lets say our dork market is less than 25% of all sales - well... they have a new product! consistent supply of DB chips in adequate quantity
that said! its fair to say that as chips grade upward, the *average* CD they are selling right now probably tests higher than the *average* CD when they first became available. i think it would be natural to expect the current CDs would sort in the 12500-13000K range and the first ones they had a year ago most certainly sort in the 12000-12500 range. likewise the first commercially available DBs would m*average* in the 13000-13500 range
thus, without knowing, it is *likely* that the average "top bin" is jumping from a high CD to a low DB. lets say 12750 to 13250... thats 4%
a "full" bin jump would be 12500-13500 - 8%
ok will try again
let assume improvements are incremental and there isnt one magic 8% tweak but they are constantly improving things by a fraction of percent (raw materials, manufacturing process, thermal dissipation, junctions, diodes, etc). as these improvements prove themselves they integrate them into their process
improvements would be constant and small in nature
lets revisit what bins are - a post-manufacturing sorting of chips by flux. its not like today they are making 100% CD bin and are switching the production to 100% DB bin next month. remember there are multiple markets:
top bin: dorks like us who will pay premium for efficiency
mid bin: porch light manufacturers who need a consistent product but are price sensitive
low bin: cheap chinese companies that dont care about product quality but want the cree name. cree prob treads lightly in this market and pitches chips before selling them to certain people
so their profile of bins is prob somehting more like:
lets say last year they manufactured 3500k chips and each 100 lot had
15 CD
60 CB
25 BD
6 mos ago it was something like
5 DB
50 CD
40 CB
5 BD
now its something like
25 DB
50 CD
25 CB
so... lets say our dork market is less than 25% of all sales - well... they have a new product! consistent supply of DB chips in adequate quantity
that said! its fair to say that as chips grade upward, the *average* CD they are selling right now probably tests higher than the *average* CD when they first became available. i think it would be natural to expect the current CDs would sort in the 12500-13000K range and the first ones they had a year ago most certainly sort in the 12000-12500 range. likewise the first commercially available DBs would m*average* in the 13000-13500 range
thus, without knowing, it is *likely* that the average "top bin" is jumping from a high CD to a low DB. lets say 12750 to 13250... thats 4%
a "full" bin jump would be 12500-13500 - 8%