Introducing CobKits.com - specializing in DIY and Citizen COBs

sorry hard to keep stock when their lead time is 4-7 weeks. only other US stock of 1212s is digikey at $28 ea... id rather get you into an 1818 for less than that

@CobKits
I do not know how to order :
12 clu048-1818 3500k
12 bjb holder for clu048
3 hlg -185h-54 b
You do not have this driver on your site
Could you please tell me total cost (with Riu discount)

ill have to check with my suppliers on delivery time but it would be $54 after riu discount (sorry special orders are more expensive for me as i get no breaks on small qty- feel free to shop around for these you might find them cheaper) rest of stuff you can put in cart. shipping will be about $18 for that

CobKits said:

ill have to check with my suppliers on delivery time but it would be $54 after riu discount (sorry special orders are more expensive for me as i get no breaks on small qty- feel free to shop around for these you might find them cheaper) rest of stuff you can put in cart. shipping will be about $18 for that

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Total cost of $54 for all that stuff?

PhotonFUD said:

Total cost of $54 for all that stuff?

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It would be great
That 's just for 1 driver

CobKits said:

ill have to check with my suppliers on delivery time but it would be $54 after riu discount (sorry special orders are more expensive for me as i get no breaks on small qty- feel free to shop around for these you might find them cheaper) rest of stuff you can put in cart. shipping will be about $18 for that

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Well...I am in hurry
I would buy 12x clu048 1818,14x bjb holder and 1 x185h-54 (the 1 you have available ).
I am in Europe.
Please help me to place order

its going to be expensive to ship one driver

how about these guys

https://www.meanwell-web.com/en/product-info/ac-dc-power-supply/led-driver/gt-185-w-led-driver/hlg-185h/product/HLG-185H-54B

CobKits said:

its going to be expensive to ship one driver

how about these guys

https://www.meanwell-web.com/en/product-info/ac-dc-power-supply/led-driver/gt-185-w-led-driver/hlg-185h/product/HLG-185H-54B

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So...I will buy drivers in Europe,cob and holder from you.I will place order from your shop

do it i can ship later today

Okay, so I have a veg light project under consideration and it seems to me that citizen is competitive at a way lower capital cost. I noticed the 1212 chart that it is measured@1050mA. How does driving it softer (350/500mA) affect the numbers?
I'm thinking the 1212 is a cost effective way to get as even lighting as possible. If my thinking is off I'd love to be told.

I'm undecided on color temps yet, 6500k or 5000k. I've seen both work, but do you have any impression from your business which is the most popular?

I just have to learn how to calculate heatsinks and I'm going to order. Is your end of October delivery a large one on the 5000k? If not I'd like to pre order. Yeah, and is the bjb holder solder free? It's a sexy little thing lol.

just got word that 5000ks are actually shipping friday. ive got 30 each of 5000, 5700k, 6500k coming

CobKits said:

do it i can ship later today

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Order just done
I sent a request to you about shipping and custom,replied to your Confirmation/order mail

ok ill be back in office in a few hours, nap time....

im testing the active light engine with a 3618 chip

hlg320h-c2800b + single clu058-3618 6500k 80cri

wide open test:

cold startup
V 113.3
A 2.88
W 326
PPFD at 12" = 3640 umol

steady state after 5 min
V 113.3
A 2.88
W 326
PPFD at 12" = 3417 umol

temp droop is 6.2% of the cold start up lumen value
based on citi simulator thats a case temp of 59C and looks like



do we have a $200 315CMH killer here or what? this is veg light but obviously can be anything.


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also new toy bump. spits out this



but also produces this which should be useful

CobKits said:

im testing the active light engine with a 3618 chip

hlg320h-c2800b + single clu058-3618 6500k 80cri

wide open test:

cold startup
V 113.3
A 2.88
W 326
PPFD at 12" = 3640 umol

steady state after 5 min
V 113.3
A 2.88
W 326
PPFD at 12" = 3417 umol

temp droop is 6.2% of the cold start up lumen value
based on citi simulator thats a case temp of 59C and looks like

View attachment 3792461

do we have a $200 315CMH killer here or what? this is veg light but obviously can be anything. new toy bump

View attachment 3792462

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How does it grow?

time will tell. later T5!

CobKits said:

time will tell. later T5!

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Well post it up so we can see. My T5 is my favorite light so far that I have used as an "overall" light and it rocks the house in Veg. This would be a killer replacement so please let us know what area's can be covered and PAR measurements etc.......

i love the coverage but hate the <90 lm/W. hoping i can duplicate the dense lush results with this hung high instead.

i also have some 5700k and 6500k cutter strips coming. those vs this beast will be a good test of distributed low light vs distant intense light on stretch, etc

That's an unbelievable par for 12" from a Single cob.

CobKits said:

i love the coverage but hate the <90 lm/W. hoping i can duplicate the dense lush results with this hung high instead.

i also have some 5700k and 6500k cutter strips coming. those vs this beast will be a good test of distributed low light vs distant intense light on stretch, etc

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The spectrum also comes into play there.........not just distance from canopy