Buying cxa3070 3000K AB's, a 20-pack, who wants some ? (Europe)
- Thread starter Kuifje76
- Start date
Mathias83
Member
Hi Erl,Hi Kuifje,
I really appreciate the effort you are putting into making this work. Again thanks to @happy75 and you.
The driver is according to datasheet 90% efficient at full load. (Source : Website)
The ST version is not dimmable, but the DT version is. I have however not seen the DT version for sale.
Since this is my first build, i wanted to keep it somewhat simple. 1 cob pr. sqf @1050ma - a fixture with 4 cobs covering 2 x 2. Only intended for flowering.
When the fixture is working, maybe some 730nm for putting them to sleep, could be a nice add on. Maybe reflectors like pos uses.
I do like the idea about a low voltage driver and less messing with the wires. The price is great, but shipping sucks...
I have not seen any decent heat-sinks in Europe. I sure like the ones from heatsinkusa, but shipping would properly be a killer.
However I do have some boxes with some Intel P4 CPU coolers, some with copper core, some pure aluminum.
Still not quite sure if the cob holders fit on those.
I'm sure that ebay, would work just fine
Take care, and be safe
I w'd like to build some thing similar to yours , i will start with 2 x 2 tent for one plant but i think 2 cobs at 1400 mA will be fine for this area .
four cobs gives power if you operate @ 1050mA and 36 Volt will be 37.8 Watt per sqf , is it too much maybe ?
i saw some where here that 25 W per sqf gives decent results .
I believe 2 cobs @ 1400 mA will produce heat more then 4 cobs @ 1050 mA relatively ?
What do you think ?
Sorry i'm a bit confused , i didn't read too many threads about it , no time because of School .
The Erlking
Member
Hi,
I have ZERO experience in DIY, so i am not the most qualified person to give out any advice
However I would recommend reading all (or some) the CXA/DIY threads - Your adventure would be some what easier, when you have some knowledge
Regarding Watt/sqf - look at this post by captainmorgan.
I think the 4 cobs, with more wattage would produce more heat, but again - i'm no expert
Take care, and be safe
The Erlking
Member
Nice thread, it's most welcomeHave a look at this thread for heatsinks in Europe, maybe we should start another thread for drivers in Europe
BirminghamAluminium : 1000 & 9000 series are worth looking into (also calculation thermal resistance)
FisherElectronik.de : SK418, SK530 and others
Will look for the dimmable driver, really like the splitted voltage and decent efficienty
I consider 730nm a must have, will add it once the cobs are setup.
Since i'm gonna grow Durban Poison (100% sativa) i need to add extra blue and UV too, but that's for later
Any idea of the price range for your 120 cm heatsink? And the weight of it?
Have you made plans for the 730nm project?
And what's up with the blue/UV project?
Take care, and be safe
@erl,
No prices yet, or weight
730nm will follow once i'm started, since you only use it when flowering, first things first
The blue/UV is necessary for thc-v production.
I think it's the thc-v why I want to smoke, it's something typical for haze varieties, have a look here.
I've read somewhere you can't grow Durban Poison properly under lights because of the absence of UV.
Another strain i found (forgot the name) that is extreem high in thc-v, looked COMPLETELY blue, I kid you not !
Since leaves are normally yellow-green under HPS and more green under MH (because they reflect that light), my only conclusion for growing DP is that it needs UV/blue light.
No prices yet, or weight
730nm will follow once i'm started, since you only use it when flowering, first things first
The blue/UV is necessary for thc-v production.
I think it's the thc-v why I want to smoke, it's something typical for haze varieties, have a look here.
I've read somewhere you can't grow Durban Poison properly under lights because of the absence of UV.
Another strain i found (forgot the name) that is extreem high in thc-v, looked COMPLETELY blue, I kid you not !
Since leaves are normally yellow-green under HPS and more green under MH (because they reflect that light), my only conclusion for growing DP is that it needs UV/blue light.
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hey Mathias,
If you use 4 instead of 2 and you use the same total amount of watt in both cases, 4 will give less heat (for sure !) and a bit more light (and better distributed)
Waiting for cobs and in my case more money to order stuff, but the closet is ordered