Trippyness
Well-Known Member
Well it all depends on your setup, but yes the 100COB is top.
As for CCT 3500K is by far the most popular.
Would like to get a Vote Going on what CCT people want.
Lets talk about "Other" COBS !
- Thread starter Trippyness
- Start date
As for CCT 3500K is by far the most popular.
Would like to get a Vote Going on what CCT people want.
Trippyness
Well-Known Member
Ok so I will post the datasheets for both the 50w and the 100W. Both from different manufacturers due to price points.
The 50W is much easier to read and the 100W does not have the currents so Ill list them.
I had the datasheets translated via Skype with manufacturers to get the numbers as some currents are not listen in 100W.
I will be testing these.
If all is well, ill be picking up quite a few. What CCT are people mainly interested in? I myself want 3500K.
Will be easier to make available in America at cost no markups.
Waiting on a response from the 50W company about the 100W COB as a better price possibly around 6USD.
Take everything here with a grain of salt until tested but looks good so far.
50W
Price: $3.10USD / $4CAD
CCT: 2700/3000/3500/4000/5000
lm/W: 700ma = 160, 1400ma = 130+
FV: 34.8-36
50W Datasheet
100W COB
Price: $8USD / 10.34CAD
CCT: 3000/3500/4000/5000
lm/W: 700ma = 160, 1400ma = 140+
FV: 34-36
100W Datasheet
Trippy
The 50W is much easier to read and the 100W does not have the currents so Ill list them.
I had the datasheets translated via Skype with manufacturers to get the numbers as some currents are not listen in 100W.
I will be testing these.
If all is well, ill be picking up quite a few. What CCT are people mainly interested in? I myself want 3500K.
Will be easier to make available in America at cost no markups.
Waiting on a response from the 50W company about the 100W COB as a better price possibly around 6USD.
Take everything here with a grain of salt until tested but looks good so far.
50W
Price: $3.10USD / $4CAD
CCT: 2700/3000/3500/4000/5000
lm/W: 700ma = 160, 1400ma = 130+
FV: 34.8-36
50W Datasheet
100W COB
Price: $8USD / 10.34CAD
CCT: 3000/3500/4000/5000
lm/W: 700ma = 160, 1400ma = 140+
FV: 34-36
100W Datasheet
Trippy
Airwalker16
Well-Known Member
I myself would want a few of all the CCTs honestly
Airwalker16
Well-Known Member
LEGIT, gimme 30 of them please.
These are honestly very similar to CXB... if they truly perform as stated, I'll be using them from here on out. But if the 100W really are $8 compared to $3 10, I don't see many people buying em. Might as well do 2x 50W and get more spread. . But they're both 34.8 forward voltage? Well.. 34.8/ 34-40.
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didn't we talk about "other" cobs already somewhere else?
https://www.rollitup.org/t/cob-manufacturers-other-than-cree-or-bridgelux.883644/
https://www.rollitup.org/t/cob-manufacturers-other-than-cree-or-bridgelux.883644/
Airwalker16
Well-Known Member
Rofl...
Atulip
Well-Known Member
Cxa2540 for $11. 17w @ 50% efficiency. $.65/w Crees are all about the same price at equal efficiencies.
BOBBY_G
Well-Known Member
forward voltage vs current curve (29ish-33V) does not match datachart which lists 36-40V.
would be good to get a better V vs I curve to accurately calc lumens/watt.
looks to be over 150 lm/W @ 1200 mA, if in fact voltage is under 36V as listed on chart
if we use the ~29V@1200mA (wtf is that Y axis logarithmic or something?), then we are at 29V*1.2A=34.8W, with 6250 lm that is 179 lm/W which would put them jsut above a BB on a 3070 and close to a CD bin 3590
its prob so efficient because its really so blue.... 4000 and 5000K 3590s are pushing into DD bin now which are well over 200 lm/W in the 35W range
need more/better data on the 100W cheapies
would be good to get a better V vs I curve to accurately calc lumens/watt.
looks to be over 150 lm/W @ 1200 mA, if in fact voltage is under 36V as listed on chart
if we use the ~29V@1200mA (wtf is that Y axis logarithmic or something?), then we are at 29V*1.2A=34.8W, with 6250 lm that is 179 lm/W which would put them jsut above a BB on a 3070 and close to a CD bin 3590
its prob so efficient because its really so blue.... 4000 and 5000K 3590s are pushing into DD bin now which are well over 200 lm/W in the 35W range
need more/better data on the 100W cheapies
BOBBY_G
Well-Known Member
with the rumored bin jump and price drop those crees could be $0.40/W by end of the year, also that $40 per 3590 is not 1000 qty which is prob down into the mid $30s, so the gap closes quickly, esp if the cheapies have such a wide color range, '3000-3500K', doesnt sound like the tolerances are all that tight
ok i ran the numbers for cree- somebody else do some $/W at 160 lm/W for vero 29s and citizens....
ok i ran the numbers for cree- somebody else do some $/W at 160 lm/W for vero 29s and citizens....
I just compared a spectrograph of a cree 3500k, and it looks very similar the gl 3500k, the blue peak is about same as well (around 60%).
the gt 3000k does have more blue, much more like a 3500k.
Atulip
Well-Known Member
I did citizens. They put 50% @ 1A (35w) for $12. That's retail price. I imagine even better if you can get them in bulk.
BOBBY_G
Well-Known Member
are we talking about the same graph? im talking about the 100W cob
which is similar to a 5000K 3590. that datasheet specifically says the CCT is 3000-3500K. hard to put a lot of faith in a company that has som much conflicting data on their datasheets
BOBBY_G
Well-Known Member
lets talk apples to apples on install here
both crees and veros have handy solderless connectors for pennies per watt
these must be soldered. what is your time worth? what about people who arent comfortable soldering?
whats a realistic cost per solder joint? based on skill set and amount of cobs you might destroy in the process it might be a buck or two per solder joint and now your $8 cobs cost 10-20% more......
what about the fact for a given efficacy we are only getting 1/3 of the wattage? thats 3X the solder joints, 3x the drilling and tapping, etc.
the 3590s look more attractive by the minute when you look at all the factors. why not try to get a cree acct so you can buy 1000 lots at $30 instead?
both crees and veros have handy solderless connectors for pennies per watt
these must be soldered. what is your time worth? what about people who arent comfortable soldering?
whats a realistic cost per solder joint? based on skill set and amount of cobs you might destroy in the process it might be a buck or two per solder joint and now your $8 cobs cost 10-20% more......
what about the fact for a given efficacy we are only getting 1/3 of the wattage? thats 3X the solder joints, 3x the drilling and tapping, etc.
the 3590s look more attractive by the minute when you look at all the factors. why not try to get a cree acct so you can buy 1000 lots at $30 instead?
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BOBBY_G
Well-Known Member
$0.33/W
no I was looking at the 50 watt. cri 80. your right that's obviously the wrong chart.are we talking about the same graph? im talking about the 100W cob
which is similar to a 5000K 3590. that datasheet specifically says the CCT is 3000-3500K. hard to put a lot of faith in a company that has som much conflicting data on their datasheets
Trippyness
Well-Known Member
Just herd back about the other 100W COB with a much better datasheet.
100W COB Datasheet
They seem to not have 1400ma or .7ma listed but its a good starting point.
Plus they are much cheaper at 6.75USD per COB / 8.75 CAD.
For the price these COBS could be very good run low at .7 and get very high lumens and not break the bank.
This COB seems much better and the data sheet is much better.
100W COB Datasheet
They seem to not have 1400ma or .7ma listed but its a good starting point.
Plus they are much cheaper at 6.75USD per COB / 8.75 CAD.
For the price these COBS could be very good run low at .7 and get very high lumens and not break the bank.
This COB seems much better and the data sheet is much better.