Introducing CobKits.com - specializing in DIY and Citizen COBs

epicfail

epicfail

Well-Known Member
oh i guess the 50v volt drivers at 700ma (35w) would draw about the same wattage at the 36v at 1.05 amps (38w). That works out to 75-80 watts per heat sink, I want to keep the power draw relatively the same as my current setup and just increase the amount of photons. That being the case maybe 3x 50v chips per heat sink at 500ma (75w per sink) would would be a better way to go. For sure would need reflectors but I would be getting more photons that are better spread out a the same wattage.. HLG-120H-C500 can run up to 300v so theoretically it could drive 6x 50v chips if they don't go over 50v, which is probably possible.. unless you have a better driver option to run 6x 50v at 500ma.. constant voltage maybe???

what are the best options for chips in the 50v range?? according to the chart you posted above.. if I'm reading it right... at 25 watts the cxm22 are the best option for the price.. is this chart current?

so now this is where i need comparisons.. if the 8x 3500k 1212 gen 6 for $110 gets me about 15-20% improvement and i see you have the cxm22 3500k for 19$... 12 would be $229 plus 2 drivers. what kind of gains would i be getting over the gen 6 1212?? sorry for all the questions but when i upgrade if you have all the parts i need i will get them from you. thanks again for the help.

Also i thought you made sphere to do tests like this or was that someone else?? i have a flux meter i picked up years ago and used for 1 week of testing and setting up heights and sits in that same drawer as the Z4's led i mentioned earlier. I would love to test out a new setup again and maybe justify the cost of the meter a little more.

you can see the previous test number here...
 
Last edited:
C

Creed Bratton

Member
Hi @CobKits

Made an order on your site on march 6 for some gen 6 1212's but I haven't received any shipping confirmation. Are they on their way soon? I live in Norway, so was hoping they would be getting here in not too long.

My last order from you is working great by the way!
 
sixstring2112

sixstring2112

Well-Known Member
CobKits said:
I'm all about joking around on the forums, and I appreciate the humor in your post but a lot of new users might not get it. at some point its just spreading misinformation to suggest that citizens are 'marginal' relative to cree. if anything you might have to assume the opposite with citis having better thermal management, allowing for higher case temps, as well as performing their LM80 testing at significantly higher current than cree...
Click to expand...
rather than retract my statement i will use the car analogy like so many here love using.are we to assume that citi cobs @ 12 dollars have the same high build quality as cree does at 40 dollars? if so it would be assumed that the ford escort has the same high build quality as a lamborghini ? surely the ford motor co just does it cheaper then right lol.
@1KTrees as far as i know the only data we have comes from a citi vendor and more testing needs to be done imo.parallel wiring has been pushed here by alot of people wanting the cheaper priced cobs to be able to line up in comparison to the lower nominal voltage of cree,which if ran in series has tons of different driver options "imo" of course haha.you dont see side by side pics very often of the 2 so heres the cree 3590 next to the citi 1212 which gets compared all the time around here,maybe the voltage is close but thats about it.:wall:
20170320_102253.jpg 20170320_102240.jpg
 
BuddyColas

BuddyColas

Well-Known Member
sixstring2112 said:
rather than retract my statement i will use the car analogy like so many here love using.are we to assume that citi cobs @ 12 dollars have the same high build quality as cree does at 40 dollars? if so it would be assumed that the ford escort has the same high build quality as a lamborghini ? surely the ford motor co just does it cheaper then right lol.
@1KTrees as far as i know the only data we have comes from a citi vendor and more testing needs to be done imo.parallel wiring has been pushed here by alot of people wanting the cheaper priced cobs to be able to line up in comparison to the lower nominal voltage of cree,which if ran in series has tons of different driver options "imo" of course haha.you dont see side by side pics very often of the 2 so heres the cree 3590 next to the citi 1212 which gets compared all the time around here,maybe the voltage is close but thats about it.:wall:
View attachment 3909708 View attachment 3909709
Click to expand...
Trying to incite cob envy I see. It's not how big your cob is that counts...it's what you do with it that counts!
 
PSUAGRO.

PSUAGRO.

Well-Known Member
sixstring2112 said:
rather than retract my statement i will use the car analogy like so many here love using.are we to assume that citi cobs @ 12 dollars have the same high build quality as cree does at 40 dollars? if so it would be assumed that the ford escort has the same high build quality as a lamborghini ? surely the ford motor co just does it cheaper then right lol.
@1KTrees as far as i know the only data we have comes from a citi vendor and more testing needs to be done imo.parallel wiring has been pushed here by alot of people wanting the cheaper priced cobs to be able to line up in comparison to the lower nominal voltage of cree,which if ran in series has tons of different driver options "imo" of course haha.you dont see side by side pics very often of the 2 so heres the cree 3590 next to the citi 1212 which gets compared all the time around here,maybe the voltage is close but thats about it.:wall:
View attachment 3909708 View attachment 3909709
Click to expand...

Unfortunately Cree had been overstating their chips performance/ bins for some time now.....idk if their cobs follow the same tactic
 
CobKits

CobKits

Well-Known Member
sixstring2112 said:
rather than retract my statement i will use the car analogy like so many here love using.are we to assume that citi cobs @ 12 dollars have the same high build quality as cree does at 40 dollars?
Click to expand...
why are you comparing cobs of two different sizes on price?

sixstring2112 said:
if so it would be assumed that the ford escort has the same high build quality as a lamborghini ? surely the ford motor co just does it cheaper then right lol.
Click to expand...
you may be on to something

im throwing away my bottle of reagent grade acid and going to the hydro store later to buy some diluted PH-down at $20 quart
ill also be cutting up my $5 buckets from home depot to buy the $10 ones they sell there
while im at it, im throwing way this crap Jack's nutes and going to buy the advanced nutrients. the cartoon character on the label looks pretty honest. at 5x the price im sure to yield 5X as much, right?

while im in town ill be ditching these Wranglers for Guess jeans... im sure they'll last 3 times longer... thats simply logic, right?

sixstring2112 said:
as far as i know the only data we have comes from a citi vendor
Click to expand...
youre not looking very hard, im not the only vendor on this board that sells citi chips (or kits and fixtures). if im biased than Timber, Johnson/NGL/HLG surely must be as well. are you assuming these guys dont test their chips for performance before they put them in fixtures?

sixstring2112 said:
parallel wiring has been pushed here by alot of people wanting the cheaper priced cobs to be able to line up in comparison to the lower nominal voltage of cree
Click to expand...
not sure where youre going with this. every cree competitor has 36V cobs... the 1212s you are lamenting about here are 36V. vero has 36V chips. luminus has 36V chips. the 50V chips generally offer higher performance and in my opinion ar more future-proof. 36V 1212s are still my best seller.

there is nothing about 50V chips that would force you to select parallel over series. in fact the way drivers are stepped, a 1400 ma driver at 36V is easily replaced by a 1050 mA driver at 50V. or 2100/1400, 3500/1750, etc. Again youre jsut spreading misinformation at this point. parallel and series drivers both have their place and they are completely agnostic as to the brand of chips they are running.

sixstring2112 said:
of course haha.you dont see side by side pics very often of the 2 so heres the cree 3590 next to the citi 1212 which gets compared all the time around here,maybe the voltage is close but thats about it.
Click to expand...
i notice you omitted the larger 32mm LES chips from your comparison with cree's flagship chip. why is that?

also why do citi 1818s and luminus cxm22 consistently outperform cxb3590 (at 50-75% of the price) despite being the same package size as the 1212 in your pic? one would assume that the cree has to be a lot more efficient just based on size, right?

sixstring2112 said:
its all in fun n games ya'all i dont care what chips anyone uses
Click to expand...
i get it, were all fanboys. you cant see where a noob would be confused by all the things in your post that were completely wrong?
 
Last edited:
pop22

pop22

Well-Known Member
Its also like believing that anything over-priced must be superior. And nice try, putting the 1212 against the 3590....... however, lets put it against the 1825 which is priced about the same as the 3590. real world tests done right here on the forum show it to out perform the 3590. So what FUD do you have for that? Even the 1818 can match the 3590 and yep, it does cost less, that must make it inferior right??? Or maybe Cree thinks its name makes price gouging worthwhile..........

PSUAGRO. said:
Unfortunately Cree had been overstating their chips performance/ bins for some time now.....idk if their cobs follow the same tactic
Click to expand...
 
You must log in or register to reply here.
Top