IF you are new to LED and want help choosing what to buy, POST HERE!

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Heyo. looking at (24) cxb2530
I found Supra's chart matching amounts of cobs to drivers.
Can I assume the same numbers as the 3070 go for the 2530?
 
The Loafter said:
Heyo. looking at (24) cxb2530
I found Supra's chart matching amounts of cobs to drivers.
Can I assume the same numbers as the 3070 go for the 2530?
Click to expand...

I bet not, although I will say now that I have no idea. There are more specific threads for your question, where knowledgeable people will respond.
 
Suppose I will try elsewhere. I dont want to be the guy to go posting the same question all over the place though. lol. Thanks
 
Hi :)
i have 3 questions..
so i can use this driver hlg 600h & 12 x cxb 3590 ?
from where i should buy the 3590 3500 k ( since they are a bit more efficient ) or should i stick with the 3000k models?
from jerry or another vendor? heard something about someone new
the driver mentioned here is really expensive in europe as far as i could google it 230 € wouldnt it be better to buy some of the other ones like 3 hlg 185 1400 (3x 55€) or hlg 240 ?
 
marosa,
Combination reflector + lense ,i think a good choice.Grow - reflektor,Bloom - reflektor+lense+red 660nm.Chinese optics are not good.Good optics is fundamental.
 

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i made this post for someone who started another thread, and got a little upset when i directed him here. Some general questions those who are learning should ask

Green__Zer0 said:
Im about to drop 2000 on a setup.
Click to expand...

if youre about to drop 2000 on a 5 cob setup, you most certainly need to do a bit more homework. to put it in perspective im about to assemble my rig and it took me MONTHS of studying, learning, asking more questions, repeat, revise, redesign, repeat

its an expensive proposition you need to arm yourself with as much data as possible. if you cant answer the following questions you need to read more:

1. what sort of acceptable intensities can cobs be run at? what are the advantages and disadvantages of running them 'harder' or 'softer'?

2. how do drivers work in regard to question 1? what other factors go into driver selection?

3. how do you calculate required heat sink size? for active cooling? for passive cooling? what factors contribute to selection of either cooling method?

4. what factors influence efficiency of a cob? what is binning? what is color temp? why would you select a given color temp or bin over another?

etc
 
The Loafter said:
Heyo. looking at (24) cxb2530
I found Supra's chart matching amounts of cobs to drivers.
Can I assume the same numbers as the 3070 go for the 2530?
Click to expand...


not really, you need to :
-calculate the current you are gonna run them at
-determine forward voltage from that
-multiply voltage by number of cobs
-check that against drivers max voltage

go to http://pct.cree.com/dt/index.html

eg.2530 @ 0.5A = 34.92V
24 x 34.92 = 838V (yikes! id cut that in 3!)
8 x 34.92 = 279V

HLG-185H-C500 can handle 400V (in reality 279 V aint the best fit for any driver at 0.5A)

but lets try 700 ma
2530 @ 0.7A = 35.78V
8 x 35.78 = 286.24V
HLG-185H-C500 = 286V
perfecto!

(i personally wouldnt recommend the 2530s. time you put all the work in you lose the 'savings'.
get some veros or 3070s, both are much more efficient)
 
Want to make 2 42" strip lights using cobs and this heatsink
1.813_Profile__45193.1319737944.1280.1280.jpg
with passive cooling. Would like to use the most efficient cobs/driver I can, at a reasonable price. Im thinking maybe 5 cxb1507 or 1512s but not sure what to get. I see on the mouser site they are only available in 2700 or 3000 color. I was hoping to find 3500 or 4k as this will be used to grow edible houseplants, lettuce, tomatoes and peppers primarily. Im open to ordering from anywhere that is reputable and would really appreciate it if someone could give me a complete parts list for what I need, including cob holders (if necessary) reflectors (if necessary) etc. Id prefer to have a single driver for each strip and the environment is in my basement where temps are usually quite cool, close to 65F. I dont want to bother with fans, but there is a fan in the grow area, so there is some airflow available. I did some rough calculations and it seems that there is about 15 cubic inches of surface area per inch of this heatsink. So if it is necessary to have about 15 inches / watt of heat dissipation, you could have up to 40 watts / strip of heat, without going to active cooling? These are really rough numbers and I know some of you are much better at figuring this stuff than I am so any advice is greatly appreciated! Also Id like to wire these in series instead of parallel for safety reasons and I have thermal paste and kapton tape and basic tools already.
 
BOBBY_G said:
not really, you need to :
-calculate the current you are gonna run them at
-determine forward voltage from that
-multiply voltage by number of cobs
-check that against drivers max voltage

go to http://pct.cree.com/dt/index.html

eg.2530 @ 0.5A = 34.92V
24 x 34.92 = 838V (yikes! id cut that in 3!)
8 x 34.92 = 279V

HLG-185H-C500 can handle 400V (in reality 279 V aint the best fit for any driver at 0.5A)

but lets try 700 ma
2530 @ 0.7A = 35.78V
8 x 35.78 = 286.24V
HLG-185H-C500 = 286V
perfecto!

(i personally wouldnt recommend the 2530s. time you put all the work in you lose the 'savings'.
get some veros or 3070s, both are much more efficient)
Click to expand...

Can I run the hlg-185h-c500 at 700ma? did you mean the Hlg-185h-c700?

I sure hope you did. I've now purchased 16 x cxb2530 and 2x Hlg-185h-c700b

Holding off on the heatsink(s) 4 @ 4.885(?)" x 24" is the plan.

Thanks for the help.
 
 
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