Introducing CobKits.com - specializing in DIY and Citizen COBs

nkings

Member
Adding details for anyone interested...

-4000k 80cri 1212 x 16 @ 12.5w is unusable for any of the plants I tried (cauliflower, tomatoes, greens, herbs, peppers). Wilty bleached out barely any growth.

-3500k 80cri cxb3590 x 8 @ 25w same results, tomatoes do okay.

-2700k 90cri 1212 x 16 @12.5w all plants look healthy but growth is not great.

-viparspectra “full spectrum” 100x3w epi @160w total mothafuckin jungle.

My logic for growing veggies indoors: we live in the Rocky Mountains, where there is less oxygen in the air and it is extremely dry. Our grocery store produce in the winter is terrible and expensive. Running the furnace all winter dries out the air even more and uses up more precious oxygen inside our house.

By placing grow tents near the beds of everyone in the house and running them only at night, we can solve all these problems at once. Basically little oxygenating humidifying space heaters that produce vegetables as a byproduct.

Anyway, I placed an order for 10 of the hortilum chips on Mauser. Would be interested in at least that many if you can get a better price before they arrive Dec 5th.

Also if anyone wants some lightly used cxb3590 cd bin passive engines I’m going to be trying to sell those (the 1212’s too if anyone is interested, though those are amateur soldered without holders in groups of 4/8 on undersized heatsinks that require active cooling)
 

caretak3r

Well-Known Member
Adding details for anyone interested...

-4000k 80cri 1212 x 16 @ 12.5w is unusable for any of the plants I tried (cauliflower, tomatoes, greens, herbs, peppers). Wilty bleached out barely any growth.

-3500k 80cri cxb3590 x 8 @ 25w same results, tomatoes do okay.

-2700k 90cri 1212 x 16 @12.5w all plants look healthy but growth is not great.

-viparspectra “full spectrum” 100x3w epi @160w total mothafuckin jungle.

My logic for growing veggies indoors: we live in the Rocky Mountains, where there is less oxygen in the air and it is extremely dry. Our grocery store produce in the winter is terrible and expensive. Running the furnace all winter dries out the air even more and uses up more precious oxygen inside our house.

By placing grow tents near the beds of everyone in the house and running them only at night, we can solve all these problems at once. Basically little oxygenating humidifying space heaters that produce vegetables as a byproduct.

Anyway, I placed an order for 10 of the hortilum chips on Mauser. Would be interested in at least that many if you can get a better price before they arrive Dec 5th.

Also if anyone wants some lightly used cxb3590 cd bin passive engines I’m going to be trying to sell those (the 1212’s too if anyone is interested, though those are amateur soldered without holders in groups of 4/8 on undersized heatsinks that require active cooling)
very much appreciate that you took the time to give some of your real-world experience with veggies.
 

nkings

Member
How many 1212's? Just the ones you listed that you used? can they be separated from the heat sinks?
Yeah they can be separated from the heatsinks pretty easily. I have 16 4000k and 32 2700k. All have been used for under 1000 hours way under driven and aggressively cooled so they should basically be new. Don’t want to hijack the thread so if anyone else is interested in the chips, please message me directly.
 

Snypie

Member
The CLU048 1212 90CRI has two version:
-below BBL
-on BBL
What i can see is one of them is short on blue spectrum.
But which one is good growing plants?
 

pop22

Well-Known Member
i find this difficult to believe, other than the 1212 setup which is so under powered its ridiculous. I grow peppers and tomatoes indoors sometimes under my COB lighting with no problems at all. Show us some pics.


Adding details for anyone interested...

-4000k 80cri 1212 x 16 @ 12.5w is unusable for any of the plants I tried (cauliflower, tomatoes, greens, herbs, peppers). Wilty bleached out barely any growth.

-3500k 80cri cxb3590 x 8 @ 25w same results, tomatoes do okay.

-2700k 90cri 1212 x 16 @12.5w all plants look healthy but growth is not great.

-viparspectra “full spectrum” 100x3w epi @160w total mothafuckin jungle.

My logic for growing veggies indoors: we live in the Rocky Mountains, where there is less oxygen in the air and it is extremely dry. Our grocery store produce in the winter is terrible and expensive. Running the furnace all winter dries out the air even more and uses up more precious oxygen inside our house.

By placing grow tents near the beds of everyone in the house and running them only at night, we can solve all these problems at once. Basically little oxygenating humidifying space heaters that produce vegetables as a byproduct.

Anyway, I placed an order for 10 of the hortilum chips on Mauser. Would be interested in at least that many if you can get a better price before they arrive Dec 5th.

Also if anyone wants some lightly used cxb3590 cd bin passive engines I’m going to be trying to sell those (the 1212’s too if anyone is interested, though those are amateur soldered without holders in groups of 4/8 on undersized heatsinks that require active cooling)
 

OneHitDone

Well-Known Member
Anyway, I placed an order for 10 of the hortilum chips on Mauser. Would be interested in at least that many if you can get a better price before they arrive Dec 5th.
Had my attention till I realized they are still working on Barney Spectrum.
Although there does appear to be a healthy portion of 730 in there so could be a surprise when put into action :peace:

Screen Shot 2018-12-13 at 8.10.53 AM.png
 

Buck5050

Well-Known Member
Will any of the of the Meanwell HBG series drivers work on your luminous CMX22 light engines? I keep getting mixed output voltages from distributors compared to the factory datasheets.
 

pop22

Well-Known Member
they should work fine with a CMX22. I've an HGB 60 watts I actually use as a backup PS, I've run a Citi 1825 on it and a QB 288 lol.Worked just fine


Will any of the of the Meanwell HBG series drivers work on your luminous CMX22 light engines? I keep getting mixed output voltages from distributors compared to the factory datasheets.
 

Airwalker16

Well-Known Member
@CobKits or anyone else, have you ever seen this before? This is a failing Cree 3590


View attachment 4258066 View attachment 4258067
Yup. Happened to me. It's caused by using the graphite pads and not making contact with the heatsink and actually getting pressure on the holder too.
I've only ever seen it happen to others and had it happen to me when using the chip lok holders.
 
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whytewidow

Well-Known Member
@CobKits or anyone else, have you ever seen this before? This is a failing Cree 3590


View attachment 4258066 View attachment 4258067
This is the exact reason I went from cobs to strips. I have a bunch of of the older cxa3050s in 4k. And they were fine for about a year. And they started cracking like that. And then started getting super hot. I actually had one crack clear through and was still lighting. And it melted the plastic ring holder. Literally melted plastic dripped from the light and landed on a fan leaf.
 

Airwalker16

Well-Known Member
This one happened about a month ago. Thank heavens the HLG-240H-C1750B can run 3 CXB3590's just the same as 4.

IMAG0308.jpg

This is why I've moved away from the Ideal Chip-Lok holders and graphite to Plastic cheap holders and thermal grease.
 
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CobKits

Well-Known Member
thermal grease always my #1. never a fan of graphite. while in theory it should have better conduction, it just seems less pliable and less likely to make good contact

thats some interesting failure, never seen that. always thought phosphors were more elastic than that. so were thinking major heat stress on those chips? did the ceramic substrate crack?
 

pop22

Well-Known Member
The one I posted was run at 55 watts for about 1 year. I'll post as to whether or not the ceramic backing is cracked or not after he takes them in for warranty repair. he's friends with the business owner who makes the lights.

thermal grease always my #1. never a fan of graphite. while in theory it should have better conduction, it just seems less pliable and less likely to make good contact

thats some interesting failure, never seen that. always thought phosphors were more elastic than that. so were thinking major heat stress on those chips? did the ceramic substrate crack?
 
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pop22

Well-Known Member
Why would the graphite pad be a problem? I've seen tests on processors where they even used toothpaste and it worked, mayonaise even lol! The culprit is either te cob holder or crap cobs.

Yup. Happened to me. It's caused by using the graphite pads and not making contact with the heatsink and actually getting pressure on the holder too.
I've only ever seen it happen to others and had it happen to me when using the chip lok holders.
 

pop22

Well-Known Member
Ohh, i agree, i use to build pcs for gamers. But they all worked. even that bubblegum looking pad that came stock on cpus in retail computers worked. Performance tests of the graphite pads showed they work fairly well. I question what the problem with them is.
:roll:
In controlled tests, I saw a night and day difference between cheap Chinese paste and Arctic MX4!
 

Airwalker16

Well-Known Member
Ohh, i agree, i use to build pcs for gamers. But they all worked. even that bubblegum looking pad that came stock on cpus in retail computers worked. Performance tests of the graphite pads showed they work fairly well. I question what the problem with them is.
I truly think it's a matter of not getting pressure down on the chip itself when using graphite pads.
 
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