DiY LED - Cree CXA3070

Bueno Time

Bueno Time

Well-Known Member
Wow thanks for all the props guys.

Needless to say I am extremely impressed with these COBs so far and these are only Z4 and Z2 bins, next run 3 AB bins and 18 red/blue supplementary 3W'ers. I am also wondering if I even need the R/B leds but since I already bought them I am going to try them and see how I like them in addition to the COBs.

Cant wait to see more people complete grows with their DIY COB setups.
 
HockeyBeard

HockeyBeard

Well-Known Member
This thread has been an amazing source of information, I've been enjoying it over the past few days. I'm a fan of Newton's design on the Vinyl fence rail. I'm trying to figure out the best way to implement this as side lighting for an EFDL lamp, I like that design the most. I'm trying to conceive an efficient way to get some R/B LED's on that rail too, though, and that's where I'm getting hung up. The PC heatsinks and fans slot in nicely and can have their spots cut, but what to do with the R/B... I like the rail design because it feels like it'd be the safest to have hanging at about 4ft (moreso than just the heatsink with COB)...

My main question though, since the EFDL is already heavy in the blue (I think the full spectrum bulb is 5k), the 3k or 2.7k COB would probably be my best bet, but since the 2.7k are a bit tougher to come by (from what I gathered?) that the 3k's would be the best choice. The EFDL will have the 660/730nm lights out bar, so I shouldn't need to go too much red on the DIY rail, nor too much blue, would it be ok to leave it off all together, or would my mix be off? Maybe just one Royal and one 630 and a 660 per ft? Think that might be too much red?

Here's what I'm thinking (With a second bar on the other side of the 5x4), yeah, I'm not the best artist, but that should give a decent idea of what I'm going for. The spectrum chart is that of the EFDL bulb. Any input is greatly appreciated!
 

Attachments

Last edited:
SupraSPL

SupraSPL

Well-Known Member
Hello HB. It looks like you have more than enough blue there so you could add 3000K COBs and that would work great. It you add some deep reds, technically that would improve the spectrum. You could add a few on small heatsinks like these or something similar:
oxidation heatsinks.JPG
 
Last edited:
hyroot

hyroot

Well-Known Member
SupraSPL said:
Hello HB. It looks like you more than enough blue there so you could add 3000K COBs and that would work great. It you add some deep reds, technically that would improve the spectrum. You could add a few on small heatsinks like these or something similar:
View attachment 3199099
Click to expand...

i was at the kush expo and solis tek was there promoting their cobs. They had one 100w cob on the same heat sink. Actually 60 watts. The guys there didn't know anything technical. Except that its dual phosphor. one cob will be selling for around $500 when its released. I laughed. They said whats so funny.I said " I can build 4 cobs for a little over half of that and use higher end cobs. Thats a huge a mark up. I suggest you reconsider that pricing." After some talking when they release it next fall they want me to do a side by side vs my inda gro's. I don't even know if I'd want to use those. Regardless of if they are free or not. I guess the name "Hyroot" is more known than I could have ever guessed.:cool:
 
HockeyBeard

HockeyBeard

Well-Known Member
I was thinking the same... Great to know that the first words to come to mind from you weren't "That's overkill!"

So, maybe 2x 660nm per foot?

Hyroot, that's outrageous! It just goes to show how much markup people place on their work when they're putting the stuff together. I liken it to building your own PC, but much much more rewarding. That's what I love about some sales reps. When you start to get really technical, and are outclassing them, they have no idea why you're looking at them like they have two noses. I wouldn't want to mess with their stuff either, personally. I've got years worth of electronics experience that's just been languishing while I run a screen print shop. What better use for those iron skillz?
 
Chronikool

Chronikool

Well-Known Member
hyroot said:
i was at the kush expo and solis tek was there promoting their cobs. They had one 100w cob on the same heat sink. Actually 60 watts. The guys there didn't know anything technical. Except that its dual phosphor. one cob will be selling for around $500 when its released. I laughed. They said whats so funny.I said " I can build 4 cobs for a little over half of that and use higher end cobs. Thats a huge a mark up. I suggest you reconsider that pricing." After some talking when they release it next fall they want me to do a side by side vs my inda gro's. I don't even know if I'd want to use those. Regardless of if they are free or not. I guess the name "Hyroot" is more known than I could have ever guessed.:cool:
Click to expand...

BAHAHAHAHAHAHA....this just made my weekend....! :clap:
 
SupraSPL

SupraSPL

Well-Known Member
You could run deep reds on those at 700mA (1.7W) passively cooled and they should barely be warm to the touch. I do recommend sanding them flat first though, the mounting surface is very bad from the factory.
 
epicfail

epicfail

Well-Known Member
Golderado said:
Oh, right... It doesn't specify does it?
Click to expand...
You can tell by the part number, CXA3070-0000-000N00AB50H.

AB = bin
50H or 50F = 5000k
30H or 30F = 3000k

AB is a low bin for 5000k but that would be a great chip for veg/mother.

EDIT: I noticed that the link also says its "High-CRI" which it is not. That part number is the 70 CRI chip. In the 5000k there is a 70, 80 and 90 CRI. So it seems over priced for low bin and low CRI
 
Last edited:
Golderado

Golderado

Member
epicfail said:
You can tell by the part number, CXA3070-0000-000N00AB50H.

AB = bin
50H or 50F = 5000k
30H or 30F = 3000k

AB is a low bin for 5000k but that would be a great chip for veg/mother.

EDIT: I noticed that the link also says its "High-CRI" which it is not. That part number is the 70 CRI chip. In the 5000k there is a 70, 80 and 90 CRI. So it seems over priced for low bin and low CRI
Click to expand...
Thank you very much, very informative.
I deleted the other post to keep any confusion etc..

Thanks again, :)
 
PetFlora

PetFlora

Well-Known Member
Bueno Time said:
Wow thanks for all the props guys.

Needless to say I am extremely impressed with these COBs so far and these are only Z4 and Z2 bins, next run 3 AB bins and 18 red/blue supplementary 3W'ers. I am also wondering if I even need the R/B leds but since I already bought them I am going to try them and see how I like them in addition to the COBs.

Cant wait to see more people complete grows with their DIY COB setups.
Click to expand...

Here's an idea...

put the RBs on separate metal frame/hanging kit, that will integrate into (between) the COBs) and with separate drivers of course
 
S

SloStoner

Active Member
hello guys! awesome grows going on here! well i have a 2x2 box and i would like to use 4x 3070's. i would run them at 1.4A for total of around 200w. i think that this would be more than enough. Should i go all 3000K or should i use one 5000k for veg and then and 3000K's one by one.
So in flower i would have one 5000k in the middle and 3 3000K's around
 
epicfail

epicfail

Well-Known Member
SupraSPL said:
Quickest ladies in the next batch are finishing up. Ace of Spades at 52 days. Awesome spicy smells coming off this lady.
Click to expand...

Looks awesome again Supra, I don't know if you said this somewhere before but is 52 days from 12/12 or do you start the count when flowers show?
 
HockeyBeard

HockeyBeard

Well-Known Member
SloStoner said:
hello guys! awesome grows going on here! well i have a 2x2 box and i would like to use 4x 3070's. i would run them at 1.4A for total of around 200w. i think that this would be more than enough. Should i go all 3000K or should i use one 5000k for veg and then and 3000K's one by one.
So in flower i would have one 5000k in the middle and 3 3000K's around
Click to expand...
How would you design the light? That sounds like a good mix, just unsure how you would get a nice even spread getting that 5k in the middle. (long night last night, still a little foggy) :bigjoint:
 
S

SloStoner

Active Member
hey hockey. yeah the only way to get a nice spread would be to keep the 5000k higher and the 3000K's lower. I would like to have each cob on it's own heatsink w/fan. Anonther idea i had was to use 2 long heatsinks and use cold white xm-l2 for veg and then add the cxa3070 cobs for veg? what do you think? thanks for your input
 
HockeyBeard

HockeyBeard

Well-Known Member
Like Supra has? Gotchya. Yeah, can't argue with those results, some fine fine ladies! In a 2x2, just trying to spread the light, sounds like you should be ok, although I've got a penchant for pushing the envelope, so I'd say add a 4th 3k and go for a 4 corners (3k) + 1 (5k) middle approach, but I am far from the best person to ask about this. I'm just as intrigued and excited by this as well.
 
You must log in or register to reply here.
Top