1. We are currently experiencing issues with viewing and uploading images, our team is working on the issue.
    Dismiss Notice

Introducing CobKits.com - specializing in DIY and Citizen COBs

Discussion in 'LED and other Lighting' started by CobKits, Aug 2, 2016.


    CobKits Well-Known Member Rollitup Advertiser

    luminus 3500k up on site. 80cri here now, 90cri arrives friday
    Chronikool and pop22 like this.

    j.t.1986 Well-Known Member

    Hey im looking at doing CLU048 1212 80cri x4 .. I was gonna order from timber. but im good with my hands,have access to all tools and materials for building a frame and mounting and like saving money lol. so much info on this thread im not even sure where to begin.. its for a 2.5x1.5 cab with 48" height, i think im making the right choice with the 1212.

    any input is greatly appreciated.

    thetr33man Well-Known Member

    Whats your budget, r u in US? Do you have any intention of expanding to a larger grow area in the future?

    j.t.1986 Well-Known Member

    well i was gonna spend $299 (usd im assuming) on the timber kit.. i would like to spend less than that.. $300 cad would be good if possible. im in canada.

    and no i dont plan on expanding it.. if anything maybe a 2x4 cab eventually and veg in this one.
    the light i currently have produced some good results, but if cob's are supposed to produce better i would like to try it out.

    j.t.1986 Well-Known Member

    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

    CobKits Well-Known Member Rollitup Advertiser

    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?)

    CobKits Well-Known Member Rollitup Advertiser

    added to site:
    1212 gen6 80 cri

    1212 gen6 90 cri

    1818 gen6 80 cri

    1818 gen6 90 cri

    1825 gen6 80 cri
    3000K (6 only)

    1825 gen6 90 cri
    3000K (6 only)

    price drop on gen5 1825

    HLG-320H-48A drivers:

    CobKits Well-Known Member Rollitup Advertiser

    gen 6 coming soon:

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

    few weeks out:
    1818 3500k 80
    1818 3500k 90
    Chronikool likes this.

    CobKits Well-Known Member Rollitup Advertiser

    120 and 133 mm heatsinks on site (ship tomorrow)
    Bubblin likes this.

    epicfail Well-Known Member

    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?


    CobKits Well-Known Member Rollitup Advertiser

    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 1818) 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
    Last edited: Mar 11, 2017
    pop22 and Joe34 like this.

    epicfail Well-Known Member

    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... :wink:

    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...


    CobKits Well-Known Member Rollitup Advertiser

    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.

    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
    Last edited: Mar 11, 2017
    pop22 and coreywebster like this.

    CobKits Well-Known Member Rollitup Advertiser

    are the 3070s glued?

    chuckie86 Well-Known Member

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

    CobKits Well-Known Member Rollitup Advertiser

    sorry, busy week, that order got shuffled.

    ask me on tuesday

    chuckie86 Well-Known Member

    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

    chuckie86 Well-Known Member

    Wow that sux ok buddy ill get back to ya

    CobKits Well-Known Member Rollitup Advertiser

    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

    KonopCh Active Member

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

Share This Page