First CXB3590 - need a little advice

BurgerBro

BurgerBro

Member
Hey people,

Before I pull the trigger on this order, I would really like some advice. The is what I plan to get:

  • Meanwell HLG-240H-C1050B
  • 6 CXB3590 36v, 3500K, DB bin with glass lenses and Ø150 x 70 mm pin heat sinks
Does that sound OK?

Is DB bin 3500K the one to get now, when I am settled on CXB3590s?

Thanks!
 
CobKits

CobKits

Well-Known Member
-a lot of people are moving toward 3000k, 3500k work but if flowering is you main goal 3000k might be a better fit. also 90 cri worth investigating

-DB bin is the highest bin in 3500k 80cri. if youre settled on cree, there would be no reason to buy older chips of lower bin unless they were extremely discounted
 
BurgerBro

BurgerBro

Member
Hmm... OK, I was thinking that I would start with the 3500K and then maybe add some ~660 nm mono chips later. I would still have about 30 watts left in the HLG-240H to play with, and if I understand correctly, the efficiency of the red monos is getting better lately?

I will be using the same light for everything to begin with.

The other approach would of course be to start with a warmer light, as you say, and then maybe add blue monos, but then the efficiency start out a good bit lower.. I am torn!

Thank you so much for your feedback, I really appreciate it.
 
REALSTYLES

REALSTYLES

Well-Known Member
BurgerBro said:
Hmm... OK, I was thinking that I would start with the 3500K and then maybe add some ~660 nm mono chips later. I would still have about 30 watts left in the HLG-240H to play with, and if I understand correctly, the efficiency of the red monos is getting better lately?

I will be using the same light for everything to begin with.

The other approach would of course be to start with a warmer light, as you say, and then maybe add blue monos, but then the efficiency start out a good bit lower.. I am torn!

Thank you so much for your feedback, I really appreciate it.
Click to expand...
DB 3500k rocks @50w is now 60% efficient now and 197/lpw a game changer and I'm a grow nerd

SAM_1962.JPG
 
BurgerBro

BurgerBro

Member
OK, thanks guys. From the way you are talking, I am guessing that 3500K DB bin is at least a very, very good starting point. And then there is some discussion that it might make sense, in some situations, to go with something slightly less energy efficient. Correct?

How about the Ø150 x 70 mm pin heat sinks? Are they good enough for passive cooling at 1.05 A?
 
CobKits

CobKits

Well-Known Member
BurgerBro said:
OK, thanks guys. From the way you are talking, I am guessing that 3500K DB bin is at least a very, very good starting point. And then there is some discussion that it might make sense, in some situations, to go with something slightly less energy efficient. Correct?
Click to expand...
its a fine chip. one of many that will do the job.

less energy efficient does not always mean less photon flux efficient. plants dont grow on lumens

BurgerBro said:
How about the Ø150 x 70 mm pin heat sinks? Are they good enough for passive cooling at 1.05 A?
Click to expand...
at 1.05A/35W

105mm
120mm
133mm
140mm
150mm

all fine
.
 
V

VegasWinner

Well-Known Member
BurgerBro said:
Hey people,

Before I pull the trigger on this order, I would really like some advice. The is what I plan to get:

  • Meanwell HLG-240H-C1050B
  • 6 CXB3590 36v, 3500K, DB bin with glass lenses and Ø150 x 70 mm pin heat sinks
Does that sound OK?

Is DB bin 3500K the one to get now, when I am settled on CXB3590s?

Thanks!
Click to expand...
DB bin is what you want. I have CD bin but DB bin best. I would go with cree run them soft and you will never regret it. softer is better in led lighting.
 
CobKits

CobKits

Well-Known Member
do you have any real graphs (i.e not extrapolated/imaginary), or any single real world measurement that backs that up? as opposed to (mis)using cree data with a Tj that is only realistic in your freezer?

you know, something like this that demonstrates CD bin at 156 lm/W (ill let you extrapolate 164 for a DB because im feeling generous)

https://www.rollitup.org/t/crees-174lm-w-at-which-amp-700ma.938434/#post-13468754

i mean, cmon, selling chips and claiming 197 lm/W at 50W is one of two things - misinformed or dishonest....
 
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BurgerBro

BurgerBro

Member
Thank you so much CobKits, REALSTYLES, and VegasWinner, you really helped me out!

CobKits said:
less energy efficient does not always mean less photon flux efficient. plants dont grow on lumens
Click to expand...
Yeah, I understand that. And 3000K has been shown to be better than 3500K with a particular model Citizen COB. I just don't think you necessarily can directly transfer that knowledge to other brands or models. Without having complete knowledge, I believe Cree CXB3590 3500K, run softly, will be best for my particular situation. I need high efficiency because electricity is so incredibly expensive here. If it wasn't, I'd definitely get Citizen! The price i amazing!

I don't really understand brand loyalty. The only winner is the owner of the brand you are loyal to.
 
nogod_

nogod_

Well-Known Member
You can build a more efficient lamp with vero, citizen, or luminus cobs for less dough than a comparable sCree lamp. Not to mention all of the cheaper and more efficient PCB strip light and board options out there. Its a wonder folks are even still returning to cxb's.

I say this having only ever used sCree in my builds. If I was building a lamp this afternoon, I would not be using CXB cobs.

REALSTRUGGLES loves him some sCree, but if his love affair doesnt smack of brand loyalty, I dont know what does!

BurgerBro said:
Thank you so much CobKits, REALSTYLES, and VegasWinner, you really helped me out!


Yeah, I understand that. And 3000K has been shown to be better than 3500K with a particular model Citizen COB. I just don't think you necessarily can directly transfer that knowledge to other brands or models. Without having complete knowledge, I believe Cree CXB3590 3500K, run softly, will be best for my particular situation. I need high efficiency because electricity is so incredibly expensive here. If it wasn't, I'd definitely get Citizen! The price i amazing!

I don't really understand brand loyalty. The only winner is the owner of the brand you are loyal to.
Click to expand...
 
CobKits

CobKits

Well-Known Member
BurgerBro said:
Yeah, I understand that. And 3000K has been shown to be better than 3500K with a particular model Citizen COB. I just don't think you necessarily can directly transfer that knowledge to other brands or models. Without having complete knowledge, I believe Cree CXB3590 3500K, run softly, will be best for my particular situation. I need high efficiency because electricity is so incredibly expensive here. If it wasn't, I'd definitely get Citizen! The price i amazing!
Click to expand...
i think theyre more universal than that

while there are more side by sides with citizen, the results should translate to cree.

for flower only its really hard to recommend 3500k only

3000k run softly is electrically identical to 3500k run softly.

3500k = more lumens/W
3000k = more usable PPFD/W
 
BurgerBro

BurgerBro

Member
Jimmyclone42 said:
Listen to cobby... He has your best interests in mind... Well put..
Click to expand...
Yeah, I'm listening to cobby... From reading this forum, he is very active and definitely a VIP in the LED section. Gives sound advice based in solid theory. I'd be a fool not to at least listen to him.

3000k run softly is electrically identical to 3500k run softly
Click to expand...
That's my understanding, too. It is only the coating that is different and the same blue LEDs underneath, right?

Anyway, this is my current plan: Go with Cree 3590 run really soft, because 3590s are still the efficiency king when run soft. Use 3500K because I need to use them for both flowering and vegging, and they are proven to work really well as an all-rounder. Then later down the road, find a way to add some ~660 nm monos during flower.

Does that sound like a good plan?
 
sixstring2112

sixstring2112

Well-Known Member
But what if the new cree are 60 bucks a chip,should he still wait?
Or what if the new lower volt cree drops prices on the older 3590 to where they are as cheap as veros and shitizen,what cob would he want then ?
I want a new pc but im waiting for windows 20 :roll:
Get the goodz and get ya growin :weed:
 
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