JorgeGonzales
Well-Known Member
SURE WOULD BE NICE TO BE ABLE TO EDIT THE TOP POST AS WE GO.
ps the answer to this thread is "hell yes."
ps the answer to this thread is "hell yes."
Is this a Vero 29 killer?
- Thread starter JorgeGonzales
- Start date
klx
Well-Known Member
Seriously. Just like you can at IC for example...(if only their mods were not psycho protectionist nazis)
JorgeGonzales
Well-Known Member
Where did you find a 3500K graph? It's nice to see the numbers all lining up.
robincnn
Well-Known Member
http://ce.citizen.co.jp/lighting_led/dl_data/datasheet/en/COB_5/CLU058-1825C4_P3531_0216.pdf
http://ce.citizen.co.jp/lighting_led/dl_data/datasheet/en/COB_5/CLU048-1818C4_P3530_0216.pdf
http://ce.citizen.co.jp/lighting_led/dl_data/datasheet/en/COB_5/CLU048-1818C4_P3530_0216.pdf
JorgeGonzales
Well-Known Member
I guess it was Cree that was missing 3500k. Brain fart. Been looking at a lot of charts lately.
BOBBY_G
Well-Known Member
ok here we go. these are all 3500K 80 CRI including the CD bin 3590. data extracted from citi tool at 25C and cree PCT @39C (to normalize 2400 mA to mid CD bin flux of 12500) - again see discussion of Tj vs. Tc in PCT earlier in this thread. I also did at 25C Tc per PCT but not a huge difference
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BOBBY_G
Well-Known Member
need to extract the 3590 out to 200 lm/W (damn you PCT!) ill try to add CXB3070 tomorrow
moral of story (so far)- if youre gluing up your cobs permanently to something and dont mind soldering - 1212 hard to beat
in real world applications where holders/soldering cost time and money - 1825 and 1212 are a wash
im not sure with the way the cree is trending it can catch the 1825 and 1212! regardless of how soft you run it. those are way off the map anyway, jsut redic low currents (200-400 mA) for thsoe big ass chips. The "meat" of the graph is in the 140-180 lm/W imo
at the popular 160-170 lm/W the crees are run at, you get 50-100% more lumens for your dollar with an 1825 or 1212
moral of story (so far)- if youre gluing up your cobs permanently to something and dont mind soldering - 1212 hard to beat
in real world applications where holders/soldering cost time and money - 1825 and 1212 are a wash
im not sure with the way the cree is trending it can catch the 1825 and 1212! regardless of how soft you run it. those are way off the map anyway, jsut redic low currents (200-400 mA) for thsoe big ass chips. The "meat" of the graph is in the 140-180 lm/W imo
at the popular 160-170 lm/W the crees are run at, you get 50-100% more lumens for your dollar with an 1825 or 1212
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BOBBY_G
Well-Known Member
and of course for you people of the "HPS killer" mentality
a gavita = 150,000 lumens max for $500 so put your 300 lm/$ @ 130-150 lm/W on that chart and tell me what you see... before you buy your second (or third or fourth or fifth) bulb... if Cree doesnt kill HPS the citis sure do....even considering cost drivers and sinks (who wants to work up a cost per lumen on that for us...)
also if someone wants to convert lumen into par W using LER of 3500K ill adjust
a gavita = 150,000 lumens max for $500 so put your 300 lm/$ @ 130-150 lm/W on that chart and tell me what you see... before you buy your second (or third or fourth or fifth) bulb... if Cree doesnt kill HPS the citis sure do....even considering cost drivers and sinks (who wants to work up a cost per lumen on that for us...)
also if someone wants to convert lumen into par W using LER of 3500K ill adjust
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JorgeGonzales
Well-Known Member
This is pretty, but I think comparing Cree at Tj=55 (allegedly accurate by adjusting down to 39C from 55C to hit 12,500 lumens), to Citizen at Tj=25 is unfair to Cree.ok here we go. these are all 3500K 80 CRI including the CD bin 3590. data extracted from citi tool at 25C and cree PCT @39C (to normalize 2400 mA to mid CD bin flux of 12500) - again see discussion of Tj vs. Tc in PCT earlier in this thread. I also did at 25C Tc per PCT but not a huge difference
Just to again point out the ridiculousness of the Cree tool, I have to input Tj=8 to hit Supra's 12166lm at 2.1A Tj=50.
Why not use Supra numbers and use Tj=50 for Citizen for an equal comparison?
JorgeGonzales
Well-Known Member
No worries man, I was just being a stickler for a fair comparison. Even with Supra's numbers the Citizens would own about the same graph area.
thats what i found when i was searching other than Vero and cxa ( cxb )
spectrum for bloom at least isnt better than vero and cxb .
As u can see in 3000K peak is
like above 610nm ....
In fact all other cobs arent as good as Cree or vero on spectrum for our plant.
Some need to confirm or not this
spectrum for bloom at least isnt better than vero and cxb .
As u can see in 3000K peak is
like above 610nm ....
In fact all other cobs arent as good as Cree or vero on spectrum for our plant.
Some need to confirm or not this
JorgeGonzales
Well-Known Member
There is nothing special about the Cree or Bridgelux spectrum, I promise.
JorgeGonzales
Well-Known Member
Alright god damn it. I couldn't resist opening up the spreadsheet.
@dimebagor here you go, proof instead of promises:
@dimebagor here you go, proof instead of promises:
Evil-Mobo
Well-Known Member
So basically all the same............. within reason of course the lines are not right on top of each other but close enough..........
JorgeGonzales
Well-Known Member
Certainly nothing to lose sleep over. Relative amount of blue is probably the biggest difference...don't try to compare absolute power with these since the charts are all normalized to a relative spectral power of 1.