CXB3070 AD bin vs CXB3590 CB bin

Rahz

Rahz

Well-Known Member
The 3070 is no slouch but the 3590 is a higher bin, so just based on the light output 3590 CB would be the best choice.
 
Sxott

Sxott

Well-Known Member
I have made my lights from both of those:

Here they are:

10x cxb3070 AD 3000k ~ 2x HLG-185-1050C Designed for a 2x4 space

365 (dissipation W) * .5128 (COB efficiency) = 187 PAR W
187 PAR W/8 ft² = 23.4 PAR W/ft²
23.4 * 10.7 (ft² in 1 m²) = 250 PAR W/m²
250 * 4.88 (umol/PAR W for CXA 3000K) = 1220 PPFD.
-------------------------------------------------------------------
8x Cree CXB3590 CB 3000k ~ 2x HLG-185-1400C Drivers


390 (dissipation W) * .5167 (COB efficiency) = 202 PAR W
202 PAR W/8 ft² = 25 PAR W/ft²
25 * 10.7 (ft² in 1 m²) = 267.5 PAR W/m²
267.5 * 4.88 (umol/PAR W for CXA 3000K) = 1305 PPFD

I would guess it comes down to matching your spacing of cobs and how well they match the driver you have them paired with to achieve the output and efficiency you want.
With the 3070s ~ 5 will fit on a Meanwell 185 driver
With the 3590 ~ 4 will fit.

So I would figure out how much PPFD you want to put down and how many and what spacing of your cobs will max out your divers to match that.

For example as to why I/myself like the 3590s. The 3590s are great for over a square foot.
My space is 4x2. With a Cob centered over each square foot. 8² = 8 Cobs. 4 Cobs on a HLG-185-1400 is a great match and put out the PPFD and the efficiency I want with a perfectly even cob spacing.

My 3070 light does close to the same PPFD and effiency except I have to use 10 of them. By using 10, I have to go with 2 rows of 5 soooo . That is not a perfect spacing on a 4x2 area. (but still works great.and so run about 30 watts and 100 PPFD less) Each 3070 is covering a 9.6" x 12" Space ( 115.2 in² ) 115.2 is 10.73 squared.
If your space is 53.6" x 21.4" (10.73 in a 5x2 pattern) then the 3070s would be the better choice.

Like Alesh said apples to apples. Its your space and design that will determine the right cob for your space. What is your grow area dimensions and how much PPFD and efficiency do you want?

I hope you get what Im saying, Im not the best writer haha
 
M

mr mike hunt

Member
My plan keeps changing, decided to go with an 8x4 for the main area. 28 or 32 cxb3590s @ 49 watts per cob. 36v or 72v?

What is the optimal ppfd?
Thanks for the help everyone!
 
B

benbud89

Well-Known Member
Sxott said:
I have made my lights from both of those:

Here they are:

10x cxb3070 AD 3000k ~ 2x HLG-185-1050C Designed for a 2x4 space

365 (dissipation W) * .5128 (COB efficiency) = 187 PAR W
187 PAR W/8 ft² = 23.4 PAR W/ft²
23.4 * 10.7 (ft² in 1 m²) = 250 PAR W/m²
250 * 4.88 (umol/PAR W for CXA 3000K) = 1220 PPFD.
-------------------------------------------------------------------
8x Cree CXB3590 CB 3000k ~ 2x HLG-185-1400C Drivers


390 (dissipation W) * .5167 (COB efficiency) = 202 PAR W
202 PAR W/8 ft² = 25 PAR W/ft²
25 * 10.7 (ft² in 1 m²) = 267.5 PAR W/m²
267.5 * 4.88 (umol/PAR W for CXA 3000K) = 1305 PPFD

I would guess it comes down to matching your spacing of cobs and how well they match the driver you have them paired with to achieve the output and efficiency you want.
With the 3070s ~ 5 will fit on a Meanwell 185 driver
With the 3590 ~ 4 will fit.

So I would figure out how much PPFD you want to put down and how many and what spacing of your cobs will max out your divers to match that.

For example as to why I/myself like the 3590s. The 3590s are great for over a square foot.
My space is 4x2. With a Cob centered over each square foot. 8² = 8 Cobs. 4 Cobs on a HLG-185-1400 is a great match and put out the PPFD and the efficiency I want with a perfectly even cob spacing.

My 3070 light does close to the same PPFD and effiency except I have to use 10 of them. By using 10, I have to go with 2 rows of 5 soooo . That is not a perfect spacing on a 4x2 area. (but still works great.and so run about 30 watts and 100 PPFD less) Each 3070 is covering a 9.6" x 12" Space ( 115.2 in² ) 115.2 is 10.73 squared.
If your space is 53.6" x 21.4" (10.73 in a 5x2 pattern) then the 3070s would be the better choice.

Like Alesh said apples to apples. Its your space and design that will determine the right cob for your space. What is your grow area dimensions and how much PPFD and efficiency do you want?

I hope you get what Im saying, Im not the best writer haha
Click to expand...
I thought your post to be quite nicely organized and coherent, but then again, Im not the best reader. hehe. Sounds like a hell of a light setup you got, do you keep a journal or occasionaly shoot some bud shots? You seem to be around the sort of PPF Im looking for, surely would be nice if you shared some inspiring information! :)
 
D

DocCox

Well-Known Member
Is your area veg or flower? There is no agreed best or minimum ppfd. I run 16 36v cxb3590s 3500k @ 1.4a in my 4x4 flower, I it's pretty good. I keep my COBs extremely close to my plants and don't use lenses or reflectors - so this setup is amazing ppfd but requires daily adjusting on height or I get some minor bleaching on leaves.

If your going to veg you ideally want a light with more blue - but we've seen people grow under 3000k lights full cycle and do really well.

72V cobs are great for pushing harder, but if your set on running at 49w the most tried and true combo is 4 cxb3590s per HLG-185-1400 . It's the only combo I've used, so my .02c isn't worth as much as many of the more experienced folks.
 
Rahz

Rahz

Well-Known Member
mr mike hunt said:
My plan keeps changing, decided to go with an 8x4 for the main area. 28 or 32 cxb3590s @ 49 watts per cob. 36v or 72v?

What is the optimal ppfd?
Thanks for the help everyone!
Click to expand...
I posted a modified PPFD -vs- photosynthesis chart in bar form a while back and have recently revised it using the optimal growth temps and was more meticulous with the translation. It should be very accurate now and has a much smoother curve. It is measuring veg rather than flower, but still useful I think. With this new translation you can see there is a gradual leveling and no magical point that is "best".

PPFD2.jpg
 
Sxott

Sxott

Well-Known Member
Rahz said:
I posted a modified PPFD -vs- photosynthesis chart in bar form a while back and have recently revised it using the optimal growth temps and was more meticulous with the translation. It should be very accurate now and has a much smoother curve. It is measuring veg rather than flower, but still useful I think. With this new translation you can see there is a gradual leveling and no magical point that is "best".

View attachment 3518190
Click to expand...

This chart is good info. Its derived from a government study done on cannabis. I like your red chart too Rahz :)

I design mine to be 1200 - 1300 because I know I will always be hitting over 1000 at the canopy with whatever losses I get from scatter or what not. But I dont kick it up to full power until the buds start setting in.
The big gains seem to level off at around 900 - 1000

I think that 32 cobs in a 8x4 space is perfect because you will have one over every square foot. 1.4A is what I run mine at too Doc.

It will be a spendy build but you will have a damn near unbeatable light. (Until a CXC comes out haha)

I dont have any flower pics but Im doing very well. Just pulled 12 zips of GG4 from a 2x4 tent about a month ago. My 1000 Watt Open HPS lights are now in storage. I will get some pictures up next round. Until then check out napalmDs. He uses the last gen cxa cobs and kills it:
https://www.rollitup.org/search/5535534/
 
robincnn

robincnn

Well-Known Member
SupraSPL said:
Looks like the top bin 3590 is about 6% more efficient than the 3070. That makes sense considering the 3590s larger size and more dies. Another way to look at it, if we see a new top bin for the 3070 we can expect a new top bin for the 3590 as well.
View attachment 3519476
Click to expand...
I get your point why you say 'top bin 3590 is about 6% more efficient than the 3070' at 1.4amps. 56.34 - 50.77 =5.57%~ 6%
What do you think of this POV with bigger numbers...
Just like if 3070 was 40$ and 3590 was $50. I would say 3590 is 25% more expensive than 3070. Or 3070 is 20% cheaper than 3590.

Question: CXB 3590 is how much ________% more efficient than CXB 3070 ?
Answer (56.34 - 50.77 ) /50.77 ) = 10.97%

Question: CXB 3070 is how much _______% less efficient than CXB 3590 ?
Answer (56.34 - 50.77) /56.34) = 9.89%
 
ttystikk

ttystikk

Well-Known Member
Sxott said:
I have made my lights from both of those:

Here they are:

10x cxb3070 AD 3000k ~ 2x HLG-185-1050C Designed for a 2x4 space

365 (dissipation W) * .5128 (COB efficiency) = 187 PAR W
187 PAR W/8 ft² = 23.4 PAR W/ft²
23.4 * 10.7 (ft² in 1 m²) = 250 PAR W/m²
250 * 4.88 (umol/PAR W for CXA 3000K) = 1220 PPFD.
-------------------------------------------------------------------
8x Cree CXB3590 CB 3000k ~ 2x HLG-185-1400C Drivers


390 (dissipation W) * .5167 (COB efficiency) = 202 PAR W
202 PAR W/8 ft² = 25 PAR W/ft²
25 * 10.7 (ft² in 1 m²) = 267.5 PAR W/m²
267.5 * 4.88 (umol/PAR W for CXA 3000K) = 1305 PPFD

I would guess it comes down to matching your spacing of cobs and how well they match the driver you have them paired with to achieve the output and efficiency you want.
With the 3070s ~ 5 will fit on a Meanwell 185 driver
With the 3590 ~ 4 will fit.

So I would figure out how much PPFD you want to put down and how many and what spacing of your cobs will max out your divers to match that.

For example as to why I/myself like the 3590s. The 3590s are great for over a square foot.
My space is 4x2. With a Cob centered over each square foot. 8² = 8 Cobs. 4 Cobs on a HLG-185-1400 is a great match and put out the PPFD and the efficiency I want with a perfectly even cob spacing.

My 3070 light does close to the same PPFD and effiency except I have to use 10 of them. By using 10, I have to go with 2 rows of 5 soooo . That is not a perfect spacing on a 4x2 area. (but still works great.and so run about 30 watts and 100 PPFD less) Each 3070 is covering a 9.6" x 12" Space ( 115.2 in² ) 115.2 is 10.73 squared.
If your space is 53.6" x 21.4" (10.73 in a 5x2 pattern) then the 3070s would be the better choice.

Like Alesh said apples to apples. Its your space and design that will determine the right cob for your space. What is your grow area dimensions and how much PPFD and efficiency do you want?

I hope you get what Im saying, Im not the best writer haha
Click to expand...
You're pushing a very high PPfd level. How are your plants liking it?
 
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