Cxb3590 combination help

[cali88]

Hi I looking for the best efficiency and big yield for my tentthe options is:
40x 3590 on 0.7a
Or
30x 3590 on 1.4a

 

[Atulip]

What size space so you need to light. For flowing or for veg?

 

[cali88]

Space in CM : 240x120x200
Need to flowing and veg

 

[Atulip]

30 x cxb3590 @ 1.4A would give you a ppfd of 1329 in that sized space. 1500watts @ 56% efficient. CO2 probably needed at this much light.

40 x cxb3590 36v @ .7A would be a ppfd of 950 in the same sized space. 920w @ 64% efficient.


What's your electricity costs like? I ask because 23watts per cxb3590 is a bit expensive to build, and 50-75w usually work out a faster ROI. Around 20 x cxb3590 36v @ 1.4A is probably what you want in that space. Ppfd of 886, 1000w @ 56%.

 

[cali88]

Now i have 3x hps 600w so the electicity coast is less in led light. You say 1.4a its better then 0.7a ?

 

[Atulip]

I mean your cost per kWh, US average is $.12/kWh so the added expense of 20 extra cxb3590s to build may not be worth the small increase in efficiency.

But .7A will be about 64% efficient, and 1.4A about 56% efficient.

 

[cali88]

Ok I understand.
5x 3590 on 1.4a can replace hps600w ? I want to replace x3 hps600 on cod led light. Head to head

 

[Atulip]

Well, 6 is more like it, and 8 on the safe side per 600w replacement.

 

[cali88]

So to replace 3x hps600w i need only 24 chip on 1.4a ?

 

[Atulip]

Yes. And I would expect that to perform better than HPS.

Ppfd of 1063

 

[cali88]

Yea my critical kush love light (
Maybe i can put more light on the bloom mode but i think 24 chip in 1.4a its enough

 

[cali88]

Who much hlg 240h c1400 i need to 24 chip ?

 

[Atulip]

HLG240-1400 is good for 5 x cxb3590 36v. So 5 of them for 25 chips.

Or hlg185-1400 is good for 4 x cxb3590 36v each, so 6 comes out perfectly for 24 cobs.

 

[cali88]

Thank you very much !!!
Now heatsink i need activy or passivi ?

 

[Atulip]

Passive is better for wall efficiency, and is easier to build. But active may be easier to find/cheaper to build.

If you're US, these aren't much more than sourcing the parts yourself, and come pre-wired. Just build a frame and screw them in.

2 WATT CREE CXB359 (4) COB KIT + MEANWELL HLG POWER SUPPLY FREE SHIPPING - Timber Grow Lights

Otherwise you'll probably want that type of heatsink for passive, they're available a few places drilled and tapped for the 3590 already.

 

[cali88]

Its ok ? 133 mm 50-60w heat. Or i need 150mm

 

[Atulip]

Oh yeah, KB will do. But remove your link on . Only sponsor links or led companies here.


As low as 100mm for most pin sinks, but I'd rather have 110mm+.

 

[cali88]

Done. Sorry I didn't know. In my country is hot!!
133mm will be good or buy 150mm ?
I have air conditioner too.

 

[Atulip]

133mm should be plenty of cooling.


The heat watts will only be about ~23w per 50w cxb3590.

 

[cali88]

1.4 *36v = 50.4w
You know the Coverage area of each one ?