Introducing CobKits.com - specializing in DIY and Citizen COBs

Silver or lead said:

My setup currently is meanwell hlg-185 constant voltage drivers with 4 3000k 80cri lumis on them. Can I stick 4 3500k 90cri lumis on that same driver?

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yes, electrically they are identical

CobKits said:

yes, electrically they are identical

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I thought so but just had to be sure. I didn't know if perhaps one had a slightly higher draw than the other so they wouldn't play nice on the same driver.

What is the best way to clean off Arctic MX-4 off of a chip? I'm going to have 16 of them to move from the center to the side of the 120mm heatsinks. I plan on just putting the two spectrums next to each other on the same heatsink.

isopropyl alcohol.

it doesnt really harden, easy to clean. wipe off as much as you can with a dry paper towel then clean up the residue with alcohol

1212 gen6 3500k 80 and 90 back in stock

Hey guys... Help an idiot with little time out?

I have an hlg 185 c1050b laying around and I was wondering if someone can tell me how many Citizen CLU048 1818's I can fit on it (If it is even compatible?)

Thanks in advance!

Al Yamoni said:

Hey guys... Help an idiot with little time out?

I have an hlg 185 c1050b laying around and I was wondering if someone can tell me how many Citizen CLU048 1818's I can fit on it (If it is even compatible?)

Thanks in advance!

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you can use 3 x 1818 with that driver or if you use 1212 you can run 5 of them and max out the driver better for around 190w

sixstring2112 said:

you can use 3 x 1818 with that driver or if you use 1212 you can run 5 of them and max out the driver better for around 190w

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Thanks a bunch!

sixstring2112 said:

you can use 3 x 1818 with that driver or if you use 1212 you can run 5 of them and max out the driver better for around 190w

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Is there a meanwell I can drive 5x 1818's with?

I think 1818's are 50v so any driver with 250v would work the hlg-320h-1050 would work . I think you could do 6 on that driver.

CXM22 passive assemblies back up on site:
http://cobkits.com/product-category/light-engines/luminus-light-engines/

i have some 120mm 3000k 80s already built and ready to go, so i put those on sale. the rest are 1 week or less to assemble and ship. im passing off a bunch of these to my buddy this weekend to assemble so hopefully in a week or so i have a bunch in stock in all colors

Good night

Im spanish, What are the the best cobs right now? Cree 3590?

Thanks you

it depends what your definition of "best" is

most efficient per watt at any cost?
most cost effective per watt at a given efficiency?

CobKits said:

it depends what your definition of "best" is

most efficient per watt at any cost?
most cost effective per watt at a given efficiency?

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I would like to know the two options you have said, to compare prices

Thanks you

best at any wattage is probably citizen 3618 gen6 (~$50) and luminus cxm32 gen3 (~$47)

most cost effective at a given efficiency:
citizen 1212 gen 6 ~$13
luminus cxm22 gen 3 - $17
vero29 gen 7 and vero 22 gen7 are also right up there (i dont stock those tho)

any of the chips in the second list are 80-90% as efficient as the top chips at a fraction of the price

What is coverage of 1212 driven at 1.05A? 30x30cm? 20x20cm? How much PPF at 30cm from canopy?

CobKits said:

https://www.rollitup.org/t/diy-cob-led-calculator.890214/

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I know that. But if you space 6 COBs 5cm apart in 1x1m tent, calculator will still give you same amount of PAR W or PPFD.

KonopCh said:

What is coverage of 1212 driven at 1.05A? 30x30cm? 20x20cm? How much PPF at 30cm from canopy?

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It's pretty perfect for 30x30

PPF values really depend on a lot of factors, if it's inside a box with reflective walls PPF is going to be pretty similar to PPF values closer than 30cm.

Yes, in the tent. You can also give me plain numbers under each 1212. Why not.

KonopCh said:

Yes, in the tent. You can also give me plain numbers under each 1212. Why not.

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Around 70PPF per 1212 at 1.05A.