Introducing CobKits.com - specializing in DIY and Citizen COBs

but ideally id like to keep it as inexpensive as possible, since its just a small grow intended to save me money buying elsewhere.

thank you

heatsinks are doing a tour of california and are due in weds

4 1212 + 4 120mm heatsinks are what you want

i should be stocking hlg185h-c1400b for the 1212 guys soon (next week?)

added to site:
1212 gen6 80 cri
http://cobkits.com/product/citizen-clu048-1212-80cri-choice-of-color-temps/
3000k
4000k
5000k
6500k

1212 gen6 90 cri
http://cobkits.com/product/citizen-clu048-1212-90cri-choice-of-color-temps/
2700k
3000k
3500k
4000k
5700k

1818 gen6 80 cri
http://cobkits.com/product/citizen-clu048-1818-80cri-choice-of-color-temps/
2700k
3000k
4000k

1818 gen6 90 cri
http://cobkits.com/product/citizen-clu048-1818-90cri-choice-of-color-temps/
3000K
4000K

1825 gen6 80 cri
http://cobkits.com/product/citizen-clu058-1825-80cri/
3000K (6 only)

1825 gen6 90 cri
3000K (6 only)


price drop on gen5 1825

HLG-320H-48A drivers:
http://cobkits.com/product/meanwell-hlg-320h-48a/

gen 6 coming soon:

1212 5700k 80
1825 2700k 90
1825 3500k 90

few weeks out:
1818 3500k 80
1818 3500k 90

120 and 133 mm heatsinks on site (ship tomorrow)

hey @CobKits, I'm looking for a recommendation for upgrading my almost 3 year old CXA3070 setup... basically I want to reuse my 4 heatsinks and drivers and just change the cobs/holders...

Currently I have 2 HLG-185h-c1050 drivers running 8 cxa3070 on 5.886" heatsinkusa profiles. What is the best options available and how do they compare to the CXB3590 that supraspl was talking about below?

SupraSPL said:

@61.2%
(5) CXB3590 3500K CD 36V @ 1.05A (35.5W ea) $237.50
(1) HLG-185H-C1050 $65
177.5 dissipation W -> 68.9W heat ->
passive cooled heatsink 8268cm² -> 4.9"X36" $70
or
active cooled heatsink 2756cm² -> 3.5"X36" heatsink (for spread) $45 + 80mm fan + psu $10
(5) lenses $20
108.63 PAR W covering 6ft² =
$392.50 = $3.61/PAR W passive cooled
$377.50 = $3.48/PAR W active cooled

Click to expand...

epicfail said:

hey @CobKits, I'm looking for a recommendation for upgrading my almost 3 year old CXA3070 setup... basically I want to reuse my 4 heatsinks and drivers and just change the cobs/holders...

Click to expand...

youre in luck 3070s use 35mm holders so you wont have to redrill for citizen clu048 or luminus cxm22. as far as the 61% eff supra quoted it appears that eff. number may have been overstated a bit but we have relative data from cob to cob to work with. Look at the relative performance of these cobs at your target 35-50W:



the two citizen CLU048s (1212 and 181 are gen5 but gen 6 is out now. your 3070s are prob similar to that 1212 gen 5. extrapolating from a separate test the gen 6 1212 run about 5% over gen 5 so gen6 1212 is probably close to the CXB, or a shade below. the gen6 1212 is $13. the next thing id rec is the $17 CXM22 which you see at 20-60W is about efficient as any chip out there including the 72V vero C and the CLU058-1825 (both ~$35). (CLU058-1825 is also in gen 6 so is likely a little above that but at that point youre redrilling your heatsinks so id keep it simple

so 1212, 1818, and CXM22 all match up to the holes with your current heatsinks

1212 is a 36V chip and will run similar to your 3070s on those drivers. CXM22 and 1818 are 50V chips but are also just about as efficient at 1050mA as the 1212 is, but theyre pushing 50W each. you can get 3 of them on a driver and that will be clsoe to what youre getting now with your 4 3070s per driver (152W). you can also tag a 36V chip on the tail end to max that driver out if you want

also if your heatsinks are bars, replacing 4 36V/36W chips for 3 50V/50W chips should be fine. if you have pinfins jumping from 36 to 50 may leave you needing more cooling


that said dont pitch those 3070s they got a lot of life left in em. you can probably find another use for them theyre still great chips and relatively not that dated. maybe build a super rig at low current, put all 8 of em all on an hlg-150-36B you'll need less heatsinks for that as well as they'll be 20W each.

you need to do the math on whether dropping $100-120 or more on new chips right now is worth the extra 5% efficiency bump. may be best to wait it out another year or more with the 3070s. also depends what bin they are i guess. if you were early on you may be down a bin or two and that would factor into your decision as it could be a 10% performance bump

Thanks for the reply.... I'm a machinist so drilling holes is no problem... Its 4 heats sinks with 2 chips on each, so 3 chips per driver doesn't work for me.. The chips are top bin CXA3070 3000k AB's. I also have some other Z4s I put in a drawer a long time ago because I thought they were to low of efficiency to continue so I'm pretty picky.. This picture is from when I built them, I no longer have the a51's... and yes I had the heat sinks anodized black. I built these not because I'm cheap but because wanted the highest efficiency and even if its only a fraction of a percentage the black is better at absorbing heat over bare aluminum.. also they look fucking sweet...

They might not be perfect but the supra spreadsheets the numbers have are

CXA3070 3000k AB - 46% -- this is my current setup
CXB3070 3000k AD - 51% - thats a 5% Increase
CXB3590 3500K CD - between 55 and 61%

where would the gen 6 1212 fit in with those???
and what about options with a different hole pattern?

links to pictures here...

https://www.rollitup.org/attachments/arsenal-jpg.3248848/
https://www.rollitup.org/attachments/hanger-jpg.3248841/

epicfail said:

even if its only a fraction of a percentage the black is better at absorbing heat over bare aluminum..

Click to expand...

ive always thought the reason anodization is more efficient is because it prevents oxidation, not because of the color. black absorbs light from the room as well.

epicfail said:

CXA3070 3000k AB - 46% -- this is my current setup
CXB3070 3000k AD - 51% - thats a 5% Increase
CXB3590 3500K CD - between 55 and 61%

where would the gen 6 1212 fit in with those???
and what about options with a different hole pattern?

Click to expand...

3500k will always be a higher bin than 3000k. 3500k is now in DB bin, not sure if 3000k has made it out of CB yet

lets look at 3070AB vs 3070AD vs 3590CB at 1400 ma, 55C Tj
using your 3070AB as "1" (136.5 lm/W), 3070AB @ 144.6 lm/W is 1.056 or 5.6% more efficient
3590CB is 162.6 lm/W or 1.191(19.1% more efficient)

so i hate to compare lm/W reported data between mfrs, but looking at the chart i posted the 1212 gen5 is only 5% relatively lower than the CXB3590 so your 3070 is likely well below that. so upgrading to gen 6 1212 will give you a 15-20% bump, close to CXB performance at 1/3 of the chip cost of CXB

based on your heatsink layout its hard to recommend 50V cobs (unless the heatsinks are oversized or youre going to replace your drivers to run them at 700 mA)

id say 1212 gen 6. $110 for a 15-20% upgrade seems reasonable

epicfail said:

links to pictures here...

Click to expand...

are the 3070s glued?

CobKits said:

heatsinks are doing a tour of california and are due in weds

4 1212 + 4 120mm heatsinks are what you want

i should be stocking hlg185h-c1400b for the 1212 guys soon (next week?)

Click to expand...

When will you have the hlg185-c1400b in was going to put order in how. Much they run thanks

sorry, busy week, that order got shuffled.

ask me on tuesday

Also i bought the timber diy citizen 1212 kit i guess first time trying and buying these and they are bright li like em. So far anyway i got the 4 cob citizen with the hlg185h-c1400b which 200 watts can i buy a bigger driver but only run 4 cobs on it at a time if i happen to add more cobs later or just add them now i think 6 more in my 8x4 tent would be ok since i have 4 already

CobKits said:

sorry, busy week, that order got shuffled.

ask me on tuesday

Click to expand...

Wow that sux ok buddy ill get back to ya

chuckie86 said:

Also i bought the timber diy citizen 1212 kit i guess first time trying and buying these and they are bright li like em. So far anyway i got the 4 cob citizen with the hlg185h-c1400b which 200 watts can i buy a bigger driver but only run 4 cobs on it at a time if i happen to add more cobs later or just add them now i think 6 more in my 8x4 tent would be ok since i have 4 already

Click to expand...

timber doesnt specify the specs or dimensions of the heatsink other than they are cooliance, looking at pic they are prob these:



which are gonna top out at about 50W, so in this case, if you like them the best way to expand would be to buy another kit

Have you spreadsheet for 1212 and 1818 gen6? Lumens per watt, V, I, W, temp etc... ?

i do at work, ask me tomorrow if i dont remember to post it

CobKits said:

timber doesnt specify the specs or dimensions of the heatsink other than they are cooliance, looking at pic they are prob these:

View attachment 3904361

which are gonna top out at about 50W, so in this case, if you like them the best way to expand would be to buy another kit

Click to expand...

Hi @CobKits and @chuckie86

Actually, the heatsinks we use are the CPL10070-xxx in that kit which are rated for more than the 50 watts of power that the chips output. We consult regularly with Cooliance and other heat sink manufacturers to make sure our products are properly matched to our intended usage as our product line continues to evolve.

Let me know if you have questions about Timber products - I'm happy to answer them.

Thanks,
Dan

Still struggling to find data sheets online for the gen 6 citizens so will look forward to you posting them tomorrow. Is there any difference with the fv on the gen5 to gen6 citi 1212s?

CobKits said:

are the 3070s glued?

Click to expand...

No they are in ideal holders.. the pictures are old.. the heat sinks can handle something like double what i have on there right now.. i can run them passively in the current setup but the fans are dual purpose.. they are 3000 rpm industrial fans that move enough air that i don't need anymore fans in the room.. every leaf in the 2'x4' space moves so it saves me room and excessively cools the chips as well.

when I originally designed these I wanted to use 3 drivers and reflectors but price was a constraint.. now it might not be and maybe it is doable now...

if at 1050ma 1212 gen 6 3500k is about 15-20% upgrade for 110$

then how about options for 3x 50v chips per heat sink (12 total) at 700ma with relectors.. i looks like the HLG-240H-c700 will drive 6 and the current drivers i have will run 3 each and just dim them the same 700ma... what chips would you recommend and what efficiency gains would i be looking at? keep in mind that they would be run at 700ma.

Thanks for the help by the way.. do you carry that driver?