PopularGrow 400w cob light

Bechnutnascar

Bechnutnascar

Active Member
I bought timber citizen 300w kit no frame. They have screw holes on the sides so i bought screws and each one is hung by its self. I also bought the citizen 100w kit. I made a frame for them 2 cobs and am using it in a 2x4 tent. Bright as hell. I have to dim the 300w cause my room is onlh 55"tall so yes my plants are all smaller but im working on it still. Those vegetables were grown under the 300w 12/12 lighting also.
 

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theslipperbandit

theslipperbandit

Well-Known Member
Johnny Lawrence said:
Maybe because the lights you are looking at are garbage? Seriously, there is very little info about the actual chips they are using. The technical details are almost non existent.

You don't have to buy a giant timber rig for $1000. Their 250 watt and 300 watt Citizen frames would likely crush that chinese Amazon light you have your eye on. Or you'd simply be better off with a vented 600 or a ceramic 315 or quantum boards.

How big is your space?

Oh, and before you waste your cash, let me help you out here - https://www.amazon.com/Roleadro-Greenhouse-Germinating-Flowering-Generation/dp/B01IVQ96WW/ref=sr_1_5?s=lawn-garden&ie=UTF8&qid=1493397879&sr=1-5&keywords=cree+led

^ That thing is used, but there is no way it's older than 2 years. The Cree chips that light uses are good for 5 years, if not more.


quantum board thread - https://www.rollitup.org/t/diy-with-quantum-boards.927159/
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Cree chips arent supposed to be used for extended periods of timw I use osram 1% deprecation rate
 
Johnny Lawrence

Johnny Lawrence

Well-Known Member
undercovergrow said:
which one did you decide to go with?

appreciate the link and info @Johnny Lawrence quick question: for another $100 what about the CXB3590 for a small grow?
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The Citizen chips are cheaper than the Crees, but are comparable to them in terms or performance/light output. They're a slightly better value.
Bechnutnascar said:
I bought timber citizen 300w kit no frame. They have screw holes on the sides so i bought screws and each one is hung by its self. I also bought the citizen 100w kit. I made a frame for them 2 cobs and am using it in a 2x4 tent. Bright as hell. I have to dim the 300w cause my room is onlh 55"tall so yes my plants are all smaller but im working on it still. Those vegetables were grown under the 300w 12/12 lighting also.
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You might want to look into quantum boards if head space is an issue. They're cheap, and I've seen some grow journals where guys were producing pretty big colas under them. I linked to the quantum thread on page 1.
 
undercovergrow

undercovergrow

Well-Known Member
Johnny Lawrence said:
The Citizen chips are cheaper than the Crees, but are comparable to them in terms or performance/light output. They're a slightly better value.

You might want to look into quantum boards if head space is an issue. They're cheap, and I've seen some grow journals where guys were producing pretty big colas under them. I linked to the quantum thread on page 1.
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just for clarification for me: the Citizen chips are the better value?
 
morgwar

morgwar

Well-Known Member
You can take the chinese piece of crap and swap out the on board chips with vero 29s for an extra hundred bucks
Then replace the cheap drivers over time
200 for the cheap shell and drivers 100 for the veros. Or yeah just go with timber like he did, if your worried about drivers
The cheapo drivers will get you by, I ran mine for nearly a year
Check out grow mau5 mars conversion
 
theslipperbandit

theslipperbandit

Well-Known Member
Johnny Lawrence said:
Expensive + shipping overseas.

I've never heard your claim that Cree cobs can't be run for extended periods. Care to share where you heard this? Links?
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Ive bewn looking for ages but cNt find rhe scholar but heres a quote from the site
"
In our new design a cluster of 12 Osram Surface Mounted COB provide higher output than a traditional 50w COB whilst giving a Tri-Mix of colour temperatures to provide an output spectrum closer to the sunlight than a traditional COB.

The immediate benefits are:

  1. The spectral output is closer to sunlight by mixing colour temperatures within the array than using any larger single cobs.
  2. Greater efficiency in the same small footprint, more light out for the same power in. The total output exceeds that of normal 50w COB.
  3. COBS Mounted with the same solder pad technology as the Osram SSL80 family to a triple layer MCPCB, meaning a longer lifespan and faster build.
  4. Better thermal management due to the mounting technology it eliminates any possibility of thermal spikes.

And I like to provide peer reviewed resources but this is what I found with a quick browse but this link verifys the above post.keep in mind this its the most unbiased site ive found since they give u the option of cree n osram. In ir lights


https://www.blackoakled.com/blogs/black-oak-led-blog/cree-vs-osram
 
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