My room design with 7 COBs

KonopCh

KonopCh

Well-Known Member
So, I have 80x80x160cm tent. 6x Citizen 1212 driven at 1.05A and 1x Cree CXB3590 driven at 1.8A. This gives me 900-1000 PPFD. Two heatsinks with 1212 are 50x50, Cree is in the middle. Look at picture for dimensions. I tried to space middle COBs little on the side, because Cree is in the middle and it's stronger than 1212. So, I wonder if this is okay setup and will give me optimal light coverage in my 80x80 tent. Or need to space heatsinks little more wide? If I hang this light in the center of tent, there's a hole from light to walls which are 30cm apart. I think there will be less PPF? I can widen a little this light if you say so.

 
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Easiest way is to imagine your tent split into quarters and center the lights using that. I wouldn't run the cree but if you are I would not have it running at a higher current than the citizens. Seems to me like that is just going to put a really big hot spot right in the center of your tent. No reason to push the center citizens out. Keep everything in a line.

What are the dimensions of the individual heatsinks? You said 50x50 but is that the dimension of the whole unit?
 
I already buy Cree before, so it stays as is. I will mount it on this light fixture. It's also 3500K which I will use for first week or two in veg mode. Then I will power Citizens.
Heatsinks are 50x12 cm, but whole unit is 50x50 cm. For now. I can extend it to 60x50, 70x50. ? Really want even spread before I hang it on ceiling.
 
A 50x50 frame in a 80x80 tent is fine. You'll only have 15cm or 6in on each side of the light between the wall and light. This is pretty close and another reason not to push those center citizens to the end of the heatsink. If you're running the lights bare you'll have plenty of spread.
 
it would be 30-35cm if the frame was all the way against one wall. If your 50x50 frame is centered than 80-50= 30cm. Divide the 30cm by 2 and you have 15cm separating the frame and the tent wall. Add 6cm for your centered light and you have 21cm separating COB from wall.

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No problemo my man. I just wanted to make sure you had all the correct info for your build. I knew something wasn't clicking or something was lost in translation. Have fun.
 
One thing more...

I have power cord with yellow/green, blue and brown wires. Yellow/green is ground, blue is neutral as I can see from google.

English is not my first language, so I am little lost. I know positive and negative wires with ground.
So... which one is positive (I know some countries have red) and which one is negative (some countries black)?
 
One question again...
I wire "ground" from driver to wire in the wall. Instead to heatsink. Correct?
 
RandomHero8913 said:
You should 3 grounding wires connected.One wire coming from the power cord. One coming from the driver. One connected to the heatsink. All three of these wires should be connected together. I use these Wago connectors. https://eshop.wago.com/JPBC/0_5Star...6?supplierAID=221-413&catalogID=WAGO01&zone=7
Click to expand...

I don't understand. One is power cord/cable, other is from MW driver.
I wire power cord to MW driver and stick it to wall holes. Not good?

Sorry, english is not my first language.
 
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