Ok so I want to build a cob light

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Manfromthenorth

Well-Known Member

• Mar 18, 2017

• #1

the end goal is to be able to cover 100f2 but want to start small and just make a bunch of individual lights to be able to adjust height where ever and when ever needed. Clear as mud lol I like the looks of the citizen 1212 but have not figured out the most efficient way to drive them any one with ideas throw em out there let's hear em.

 

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Manfromthenorth

Well-Known Member

• Mar 18, 2017

• #2

So I think I want to do a light that will cover a 8f2 area from what I have read I think that 8 citizen 1212 3000k 90cri can be driven safely with a hlg 320h 36a am I right or am I wrong?

 

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Manfromthenorth

Well-Known Member

• Mar 18, 2017

• #3

Well that's not going to work I don't think

 

CobKits

Well-Known Member

• Mar 18, 2017

• #4

that would be fine, maxed out that driver would push 1.21A x 8 cobs at a very efficient 44W each (also 44W/SF which would cover all your needs)

 

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Manfromthenorth

Well-Known Member

• Mar 18, 2017

• #5

You would have to wire in parallel correct?

 

CobKits

Well-Known Member

• Mar 18, 2017

• #6

for that driver yes. or you could do it in series with 2 hlg-185-1400b but youd be dimming a little

 

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Manfromthenorth

Well-Known Member

• Mar 18, 2017

• #7

Would it make that much difference?

 

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Manfromthenorth

Well-Known Member

• Mar 18, 2017

• #8

There's would not be enough voltage right there only 143 volts output? Maybe I'm looking at the wrong numbers

 

CobKits

Well-Known Member

• Mar 18, 2017

• #9

143V is enough to light up 4 36V nominal cobs

 

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Manfromthenorth

Well-Known Member

• Mar 18, 2017

• #10

I just looked at a 185h c700 286 volt looks like it will run eight but with only 700ma but that is soposed to be the best way to run them to get the most photons vs heat right?

 

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Manfromthenorth

Well-Known Member

• Mar 18, 2017

• #11

What are the pros and cons for wiring in parallel vs searies.

 

Olive Drab Green

Well-Known Member

• Mar 18, 2017

• #12

Manfromthenorth said:

What are the pros and cons for wiring in parallel vs searies.

Click to expand...

If you wire them in parallel, if one goes out, I believe the circuit is broken. "One goes out, they all go out."

Also, if one goes out, the current could be redistributed to other lights and blow, I believe? But it's also the simplest way.

Use good parts. Don't fuck it up.

 

CobKits

Well-Known Member

• Mar 18, 2017

• #13

series- more idiot proof, but can see really high voltage in low current cases like the 700 mA you are targeting
parallel- more flexible/expandable, better for arrays with cobs of 4 or more

 

Olive Drab Green

Well-Known Member

• Mar 18, 2017

• #14

CobKits said:

series- more idiot proof, but can see really high voltage in low current cases like the 700 mA you are targeting
parallel- more flexible/expandable, better for arrays with cobs of 4 or more

Click to expand...

Maybe I'm thinking of series? One linked to the other linked to the next?

 

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Manfromthenorth

Well-Known Member

• Mar 19, 2017

• #15

ok so running in parallel is going to be my best bet for what I want to do. Running in parallel like above will the 1212 chip put out enough light intensity at 44 watt?

 

brewbeer

Well-Known Member

• Mar 19, 2017

• #16

Manfromthenorth said:

ok so running in parallel is going to be my best bet for what I want to do. Running in parallel like above will the 1212 chip put out enough light intensity at 44 watt?

Click to expand...

8 cobs at 44 watts each is 350 watts. Over 10 sq.ft. (2 x 5, which is a good module for a 10 x 10 space), that's 35 watts per sq.ft.

 

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Manfromthenorth

Well-Known Member

• Mar 19, 2017

• #17

I think keeping it at a. 2x4 spread I would have higher intensity light may just go to. 12x10 or 12 for final goal but at the moment I just need some where to start all this info is cool but I don't learn that way so I need stuff to work with.