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looking at some chart(do not remember if in this thread or another) I have seen 1212 efficency(real world tested, not manifacturer data):
60% @700 mah,25 watt
56% @1000 mah, 35 watt
52% @1400, 50 watt
Is there something similar for 1818?
Looking for 1818@ 75W , @ 55W , @ 43.4W , @ 35W
I am about to build my first fixture and need to choose best option between 1212 and 1818(including wise driver matching and holder, already have heathsink bar)
Since I am in europe, I need to buy all from you to save on shipping
I am not interested in citizen data since they are underrated and very different from real world
(sorry for bad english)
Thanks
looking at some chart(do not remember if in this thread or another) I have seen 1212 efficency(real world tested, not manifacturer data):
60% @700 mah,25 watt
56% @1000 mah, 35 watt
52% @1400, 50 watt
Is there something similar for 1818?
Looking for 1818@ 75W , @ 55W , @ 43.4W , @ 35W
I am about to build my first fixture and need to choose best option between 1212 and 1818(including wise driver matching and holder, already have heathsink bar)
Since I am in europe, I need to buy all from you to save on shipping
I am not interested in citizen data since they are underrated and very different from real world
(sorry for bad english)
Thanks
Last edited:
CobKits
Well-Known Member
ill make a supra-style chart for all the drivers when i get a chance
Thank you
I am doing some math, and even if I have heathsink bar, the cost of 1212 is more than 1818 ,since you do not have some driver that match best with 1212(for series or parallel)
Here is my (supposed)number:
1212 configuration
Ideal holder for Citizen CLU048 series X18
Citizen CLU048-1212 80CRI X18
MeanWell HLG-240H-C Driver 1050mah (6 cob per driver at 35w ea) X3
Total $522 for 630W of light at 56% eff
1818 configuration
Ideal holder for Citizen CLU048 series X12
Citizen CLU048-1818 80CRI X12
MeanWell HLG-185H-48A Driver (4 cob per driver at 55w ea,Base3d on your indication) X3
Total $492 for 660W of light at 56%
So 1212 is not the most convenient option.Am I wrong?any suggestion?
thank you
CobKits
Well-Known Member
1212 configuration:
238V on the driver
at 1050 mA the cobs are 36.2V, 38W ea = 684W
1818 configuration:
4.25A/4= 1062 mA = 55.7W x 12 = 668.4W
the 3W per cob difference on the 1212 makes a difference
citi tool rates these both at 164 lm/W so yes seem like a match
and yes the 185-48A drivers will always be cheaper per watt as i have a bunch and they are on sale...
remember you will need more holders for the 1212s and more time to mount
238V on the driver
at 1050 mA the cobs are 36.2V, 38W ea = 684W
1818 configuration:
4.25A/4= 1062 mA = 55.7W x 12 = 668.4W
the 3W per cob difference on the 1212 makes a difference
citi tool rates these both at 164 lm/W so yes seem like a match
and yes the 185-48A drivers will always be cheaper per watt as i have a bunch and they are on sale...
remember you will need more holders for the 1212s and more time to mount
Be careful with case fan....I had bad experience with servo-nidec high rpm fan
So, since I do not need really more than 550W of light(to be honest,500W would be more than enough for a 4x4)what do you think is best?
I would go for 12x1818.
I do not know how dimming works on hlg-185h-48a....Can I dimm every cob down to 1000 mah or lower(and get every cob to 50Watt or lower)?
Since I am more used to constant current driver,the hlg-240-c 1050 would be much easier to work with,but also way more expensive,plus I do not like to work with high voltage for safety reason(238v at 1.05A dc could kill ,36v at 4A dc I think do not pass skin resistance,but maybe I am wrong)
I saw on hlg-600h thread you posted a connector for parallel wiring.
Inside europe the only thing I can find is this:
http://www.tme.eu/en/details/2273-208/terminal-blocks/wago/
Is it ok?
CobKits
Well-Known Member
The one I posted are not reusable?
Wago-222 are not enough for me.I need more than 5 pin, for future upgrade in parallel and increase efficiency
Rocket Soul
Well-Known Member
This ppfd chart is only really missing one thing, a comparison with a cxb3590 72volts. Cree says the same preformance as 36 v but most of the winners are high voltage chips.i dont stock them i just have a few samples for now, theyre here, so a solution for you
heres what i have, one of each of some may have been mounted for the test above
View attachment 3780340
heres prices (straight across no riu discount)
-1919 -$5 including solderless holder
-2828 (37.5W) -$7 including holder (the no-name holders they sent me looks like they could take reflectors but i dont have any. the ideal and bjbs for -048s on my site fit these as well and accommodate reflectors, but youd have to buy seprately)
-2828 (56.3W)-$11 including holder (same dealio as above)
-2828 (84.5W)-$15 including holder (same dealio as above)
-3838 (117.4W)-$23 including the weirdest ceramic holder youve ever seen- the -058 bjbs on my site also fit these
-3838 (169W)-$32 -$23 including the weirdest ceramic holder youve ever seen- the -058 bjbs on my site also fit these
i really bought the smaller cheaper ones of different color temp to run on the spectrometer (as they had sm.qty samples available) but may not get around to that. may or may not elect to keep them.
could mount any of the 2828s or 3838s on an active light engine if you wanted. if youre into that we would just discount the price from the citi chips (use say $24.50 for 1818 and $40 for 1825 - mounting would be the same - bjbs for 2828 and i would solder and mod reflector for 3838 )
JorgeGonzales
Well-Known Member
Not because they are high voltage. Cree isn't lying.
Rocket Soul
Well-Known Member
I can see that but still interesting, and i believe all measurements on this thread, and topbin threads have been 36 volts. What weve learnt is to trust our own measurements rather than datasheets, right?
JorgeGonzales
Well-Known Member
Yeah but we trust Ohm's law more.