Anyone know this Citizen COB?

Strainhunters

Strainhunters

Member
Hello my fellow growers,

A couple of years ago I had look at that generation commercially available LED lights (MARS Hydro/Ufo etc.) but decided to leave it because a HPS was simply a better and cheaper choice.
Bcause it's time for me to replace my 2x Gavita 1000's I delook into LED alternatives once more, and decided to do a DIY COB led light.

From what I read on many forums, the top of the line COB seems to be the CXB3590, but as it costs a pretty penny, I was looking for an alternative and found this:

CLU048-1212C4-303M2K1 3000K
(http://ce.citizen.co.jp/lighting_led/dl_data/datasheet/en/COB_5/CLU048-1212C4_P3368_1115.pdf)

I can buy these for like $10 Locally (no shipping needed) and because they are so cheap I was thinking of just making 2x monsterous lights with them to replace my Gavita's.

I use 2x Aeroflo 20 systems in seperate connected tents and wanted to make 2 COB panels, 1 for each tent.



As the price of the COBS is SO low I was thinking about 1 of the Citizen COB PER pot/plant. As there are 20 plant sights, that would mean a 20 COB panel.

What is your thought on this?

Hope someone can tell me more about these specific COBs too :)

Kind regards,

Strainhunters
 
coreywebster

coreywebster

Well-Known Member
Hello Strainhunters and Welcome to RIU!
Its a good choice of cob and becoming ever more popular on here. I cant tell you much other than that but there are a few on here who really love the Citi chips not just for the price!
I'm sure @CobKits would be a good source of info for you, he will also be more likely to remember who is growing with them at the moment.
There is also a thread here https://www.rollitup.org/t/diy-cob-led-calculator.890214/ in which the dude has two calculators, one of which is the citi calc, it would be a useful tool to play around with. The links are in his sig. :bigjoint:
 
coreywebster

coreywebster

Well-Known Member
Strainhunters said:
thanks guys :)

Will look into your link now Coreywebster, How can I contact CobKits?

Will keep a close eye on this thread so will reply swiftly :)
Click to expand...
just type @ in front of a username and it alerts that person. So no need, he will see your thread since I already did. I'm sure he will be happy to talk about the 1212s.
 
weed-whacker

weed-whacker

Well-Known Member
u r on the right path brother

more cobs is better , so i had to google ur system to see what size it is(7x2 foot? can't be right)

how big is each tent? I'm just thinking how many watts you would need if running 20 of the 1212 cobs
 
CobKits

CobKits

Well-Known Member
thats a good price we sell them for $12 here in the US


3000k 80cri is a popular combo

they are the best value out there in lumens/$ but you gotta deal with the multiple chips. if you are using individual heatsinks/holders/reflectors its adds up quick and can be a wash

im of the belief that the extra uniform coverage from many small chips will yield more overall per area in a properly designed garden.

CXBs were once the most efficient and popular chip - they are great but they are losing ground to competitors' new gens this year. they certainly grow fantasitically as many people here can attest, but if youre starting from scratch and looking for PAR/$ theyre a bit overpriced at this point, apart from that all phosphor based cob arrays act similarly some scale differently with current, this thread should help

https://www.rollitup.org/t/why-are-cobs-better-and-whats-so-great-about-the-3590.920480/

take that graph in post #3 with a grain of salt for a few reasons:
-all cobs have variability. i later tested a different CXB3590 and it came closer to the vero 29V7 in that graph. so this means many results are really +/- a few % so if chips are close you need to almost treat them as equal unless you want to throw down and test like 10 from each mfr
- if you were to plot that on a zero to 12 ppfd/W the differences would be far less pronounced
-just about any cob on that graph will be more efficient than the gavita if operated above the say 7 ppfd/W line - and youll never buy bulbs again - and get better coverage and a better spectrum with less IR

if you look at this post you will see that the smaller chips are generally much more cost effective:
https://www.rollitup.org/t/why-are-cobs-better-and-whats-so-great-about-the-3590.920480/page-3#post-12945281

the citizen and getian chips at the top are both similar sized. getians are a good option but min 100pc order in each color to get them so not really out there right now. the vero v7s are just coming out and are a great value and they are a bigger chip on par with the cxb. cree is at the bottom of that curve on cost alone. relative to other mfrs the cxb should be ~$20 right now. they have a new gen coming out supposedly but no info in that yet.

citi has a new gen in december but for some reason their old stock never seems to fall in price from what ive seen

id buy those chips for $10 if i were you
-
 
Strainhunters

Strainhunters

Member
@coreywebster thanks my man :)
@weed-whacker my hydro system (Aeroflo 20) measurements: 7’L X 1’6”W X 22”H footprint. As I said, this system has 20 plant sites (pots), I was thinking about doing 1 cob above each pot.
I've read some things about side lights, but not sure if it's worth the hassle. Whats your opinion on side lighting to increase the penetration?
@PhotonFUD I did some digging and I actually found them online for the same price including shipping ($10) within the USA.. not sure if it's allowed, but I can give you a link if you're interested.
@CobKits Thanks a ton for your help! I was wondering if you or someone else could give me some advise on the cooling of these cobs.

My first choice was buying 20 of these water blocks ($4.00 each):



Together with 4 of these (2 on each side, so 5 cob's per radiator with 2x fans) ($25,00 per piece):
https://nl.aliexpress.com/item/Free-Shipping-1pc-240mm-Aluminum-Computer-Radiator-Water-Cooling-Cooler-2-Fans-Fr-CPU-Heatsink/32607840295.html?spm=2114.48010708.4.85.WAnTGK

These radiators will be connected to the water blocks. The cob's will be thermal-glue'd onto the water blocks.

Or would it be better to forget about the water cooling and just get something like this:

https://www.aliexpress.com/item/1-Pieces-Aluminium-Heatsink-Cooler-Fan-For-PC-Northbridge-Chipset-Cooling/32432346031.html?spm=2114.30010308.3.97.kOsTgA&ws_ab_test=searchweb0_0,searchweb201602_5_10056_10065_10055_10068_10054_10069_10059_418_10073_10017_10070_10060_10061_10052_10062_10053_10050_10051,searchweb201603_6&btsid=c2aa7677-e237-438e-b6ee-61804b4aefdf

or

https://www.aliexpress.com/item/Free-Shipping-DIY-Heatsink-30w-100w-Pure-aluminium-heat-sink-for-DIY-intel-LGA-1155-1156/1856471182.html?spm=2114.30010308.3.1.kOsTgA&ws_ab_test=searchweb0_0,searchweb201602_5_10056_10065_10055_10068_10054_10069_10059_418_10073_10017_10070_10060_10061_10052_10062_10053_10050_10051,searchweb201603_6&btsid=c2aa7677-e237-438e-b6ee-61804b4aefdf


And which powr supply would suit the 20 citizen cobs best/ most efficient?
 
B

benbud89

Well-Known Member
Ive never done any of that water cooling. Unless youre extremely confident in that type of build, Id just get some very long heatsinks and put one or two fans on them. You have some very interesting water cooling threads on here if you insist on that. Best of luck :)
 
CobKits

CobKits

Well-Known Member
you really dont "need" to watercool, downsides of any active cooling device is its not fail-safe without proper protection circuit (doable but another layer of complexity nonetheless). the 1212s are pretty low-pro- the 105 mm heatsinks will take them to 40W and the 140s to 65W or such. i just built a passive light im gonna gift somebody and flashed forward 20 years when he says - "yeah... thats stil growing for me!"

passive advantage cant be denied
that said its all or nothing. if youre on a passive be passive. if youre gonna be active be active and run those out to 75W ea and take advantage of your work setting the cooling up when youre handily under $1/watt
 
Last edited:
weed-whacker

weed-whacker

Well-Known Member
Strainhunters said:
@coreywebster thanks my man :)
@weed-whacker my hydro system (Aeroflo 20) measurements: 7’L X 1’6”W X 22”H footprint. As I said, this system has 20 plant sites (pots), I was thinking about doing 1 cob above each pot.
I've read some things about side lights, but not sure if it's worth the hassle. Whats your opinion on side lighting to increase the penetration?
@PhotonFUD I did some digging and I actually found them online for the same price including shipping ($10) within the USA.. not sure if it's allowed, but I can give you a link if you're interested.
@CobKits Thanks a ton for your help! I was wondering if you or someone else could give me some advise on the cooling of these cobs.

My first choice was buying 20 of these water blocks ($4.00 each):



Together with 4 of these (2 on each side, so 5 cob's per radiator with 2x fans) ($25,00 per piece):
https://nl.aliexpress.com/item/Free-Shipping-1pc-240mm-Aluminum-Computer-Radiator-Water-Cooling-Cooler-2-Fans-Fr-CPU-Heatsink/32607840295.html?spm=2114.48010708.4.85.WAnTGK

These radiators will be connected to the water blocks. The cob's will be thermal-glue'd onto the water blocks.

Or would it be better to forget about the water cooling and just get something like this:

https://www.aliexpress.com/item/1-Pieces-Aluminium-Heatsink-Cooler-Fan-For-PC-Northbridge-Chipset-Cooling/32432346031.html?spm=2114.30010308.3.97.kOsTgA&ws_ab_test=searchweb0_0,searchweb201602_5_10056_10065_10055_10068_10054_10069_10059_418_10073_10017_10070_10060_10061_10052_10062_10053_10050_10051,searchweb201603_6&btsid=c2aa7677-e237-438e-b6ee-61804b4aefdf

or

https://www.aliexpress.com/item/Free-Shipping-DIY-Heatsink-30w-100w-Pure-aluminium-heat-sink-for-DIY-intel-LGA-1155-1156/1856471182.html?spm=2114.30010308.3.1.kOsTgA&ws_ab_test=searchweb0_0,searchweb201602_5_10056_10065_10055_10068_10054_10069_10059_418_10073_10017_10070_10060_10061_10052_10062_10053_10050_10051,searchweb201603_6&btsid=c2aa7677-e237-438e-b6ee-61804b4aefdf


And which powr supply would suit the 20 citizen cobs best/ most efficient?
Click to expand...

i was looking at these
http://www.heatsinkled.com/EtraLED-11020-Modular-Passive-LED-Star-Heat-Sink-Φ110mm-p09377407.html

to cool the 1212, they r 6 use each when i asked, shipping was gonna be 50usd for my qt to my location

id say forget both water and active cooling as cob kits says
side lighting is practically a moot point when u have multiple light sources like you are planning imo

going for 35w per sq ft will be sweet and you have (7x1.6) 11.2 sq ft to cover so around 400w or 20w per cob so either 500 or 700mA current

so perhaps 2x hlg 185 per trey? or if u wanna use 3 of the hlg 320s for both treys?

lots of options
 
Millsie

Millsie

Well-Known Member
CLU048 3000k

1,000ma - 5688lm / 35.5w / 160 lm/w
1,400ma - 7715lm / 51.4w / 150 lm/w = 514w
1,800ma - 9623lm / 68w / 141 lm/w = 680w
2,100ma - 16419lm / 80.9w / 136 lm/w

(from the calculator on citizen's website - Unsure what that actually means by efficiency % or heat watts generated)
(http://ce.citizen.co.jp/lighting_led/en/products2/notice_Simulator_ver5.html)

Those little waterblocks look awesome as fuck! One of the most cost effective solutions for air cooled heatsinks were IceLed 450/550/etc line - the latter apparently being good for 100w

Both air cooling and water will cost $200 usd+ however the benefit of water cooling is removing the heat outside of the room / controlling temps - Just make sure to get a good pump and enough radiators to dissipate the heat i.e. (100-300w heat watts) :)
 
CobKits

CobKits

Well-Known Member
weed-whacker said:
i was looking at these
http://www.heatsinkled.com/EtraLED-11020-Modular-Passive-LED-Star-Heat-Sink-Φ110mm-p09377407.html

to cool the 1212, they r 6 use each when i asked, shipping was gonna be 50usd for my qt to my location

id say forget both water and active cooling as cob kits says
side lighting is practically a moot point when u have multiple light sources like you are planning imo

going for 35w per sq ft will be sweet and you have (7x1.6) 11.2 sq ft to cover so around 400w or 20w per cob so either 500 or 700mA current

so perhaps 2x hlg 185 per trey? or if u wanna use 3 of the hlg 320s for both treys?

lots of options
Click to expand...
im sure like mechatronics they make all of thoe same patterns in thicker extrusions. check out jorge's 'cheap and cheerful' thread i believe he used 99mm x 80mm on 1812 or 1818 chips
 
Strainhunters

Strainhunters

Member
Millsie said:
CLU048 3000k

1,000ma - 5688lm / 35.5w / 160 lm/w
1,400ma - 7715lm / 51.4w / 150 lm/w = 514w
1,800ma - 9623lm / 68w / 141 lm/w = 680w
2,100ma - 16419lm / 80.9w / 136 lm/w

(from the calculator on citizen's website - Unsure what that actually means by efficiency % or heat watts generated)
(http://ce.citizen.co.jp/lighting_led/en/products2/notice_Simulator_ver5.html)

Those little waterblocks look awesome as fuck! One of the most cost effective solutions for air cooled heatsinks were IceLed 450/550/etc line - the latter apparently being good for 100w

Both air cooling and water will cost $200 usd+ however the benefit of water cooling is removing the heat outside of the room / controlling temps - Just make sure to get a good pump and enough radiators to dissipate the heat i.e. (100-300w heat watts) :)
Click to expand...
Thanks for all your posts guys,

@CobKits I got 20 * 1212's first to start the build of 1 light this week. Tomorrow I want to order or (just buy if I can find any locally) the led power supply's.
I'm still not too confident with which wattage would suit me best, I was thinking about 35.5w or 51.4 . Would really appreciate some advice or links to good threads regarding this.

I'm currently hunting for some heatsinks, found these so far, but any advise would be welcome:)

http://www.led-heatsink.com/seepricesandbuy.php?cateid=1638
http://www.ebay.com/itm/1pc-90-40mm-Aluminium-Heatsink-Round-for-20W-30W-50W-100W-High-Power-led-bead-/331267818468?hash=item4d2119c3e4:g:jvEAAOSwq7JTzkvt
 
CobKits

CobKits

Well-Known Member
those are both good for about 30W. 50W too much for those

youd want at least a 105-111 x 80ish sink if you want to stay passive at 50W
 
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