DIY LED Build.

i'm building my first led, for my first grow.
Am i right in thinking the CXA3070 3000k is a good pick?
I will be using it for veg, and flower. The tent is 2*4, i'm thinking 8 of them would be good.

Has anyone tried to order from aliexpress? There's three sellers there, claiming to have the AB bin.
One of them claims to be one of four, official cree reseller in China.(Chris Martin Zheng)

One of the other two first said that they had The BB bin of the 3000k, When i told her that, there was no 3000k BB bin(That is correct?) And asked for a picture, she sendt me this.
Saying that she wrote the wrong name, and reassured me this was the 3000k AB bin.
That seems a little sketchy, doesn't it? and a sample from a year ago? Dossen say what color it is either?

So what do you guys think? Any experience ordering from there?
Is there a better LED option, if i can't get my hands on the Z4, or the AB?
Should i go colder than 3000K, when using the light all the way through the grow?

I really hope someone takes the time to answer me, I've been reading so much these last few days, but i'm still a little confused.

So much great information about DIY LEDs on this board, it's F***ing awesome!

Very good info I will check it out. I was lucky enough to get 100 packs of Z4s and ABs and they were both made in Cree's Chinese facility. They came in sealed boxes of (5) 20 packs and were first available in spring of 2014.



If I can get my hands on one of these I can do a side by side test against a verified AB and see how it stacks up on the light meter.

That would be great! I just missed the boat on the 20 pack AB it appears, so if the ones on ali are legit, that would be awesome!

Are these the ones that are claimed to be AB bin?
http://www.aliexpress.com/item/Cree-cxa3070-led-light-beads-original-cob-light-source-117w-cob-light-source/1769310777.html

Here is a set of two
http://www.aliexpress.com/item/CREE-XLAMP-CXA3070-3000K-LED-chip-COB-37V-single-MAX-power-70-117W-High-CRI-9000LM/1975368271.html

Someone, dropped this link earlier and I have looked but couldn't remember, and then alie popped right up in my browser.
When I first read this, I swear that it mentioned these being AB's.

I can't find anything besides Z2 and tempted to jump on these.........

There is a seller I found tonight selling 10 pieces on Alibaba for $25-28 and mentions all bins that are pertinent but doesn't give exact prices unfortunately....also tempting
http://www.alibaba.com/product-detail/CREE-CXA3070-Original-CREE-COB-LED_60022188146.html

SupraSPL said:

Are these the ones that are claimed to be AB bin?
http://www.aliexpress.com/item/Cree-cxa3070-led-light-beads-original-cob-light-source-117w-cob-light-source/1769310777.html

Click to expand...

Jepp, Thats the guy claiming to be one of four, official Chinese cree resellers.

Amelia Liu, First claimed the BB BIN on the 3000K, then sead it was 3070-30F-AB-NOH, and that she would post a picture later.

demi wong, is the one in the abiqua link, she was the one that gave me the picture that i posted.

henriksen said:

Amelia Liu, First claimed the BB BIN on the 3000K, then sead it was 3070-30F-AB-NOH, and that she would post a picture later.

demi wong, is the one in the abiqua link, she was the one that gave me the picture i that i posted.

Click to expand...

Damn I am intrigued....without the masters jumping in, I would guess these are legit.

Only way to truly know is output, but that is after the fact.....truly good deal if legit AB's......

Yeah. I'm thinking of doing a test order, but i guess there's no way for me to know if they are legit, even if i have them in my hands?

That would be great! Yeah, i think that's the safest bet.

Why does its say 5000k/3000k? That's a bit strange, isn't there a 5k AB too? On Liu's page.....

I think I am going to give Demi Wong a try on [2x] lot. Too good to pass up. If they turn out to be something else, there's always Craigslist

It's hopefully because she has both 3000k, and 5000k. I'm So Excited to see if it's good to go!

On the way:

Sweet! Now we play the waiting game

for $38USD shipped thats not even a bad price even if its only a Z2, no import fees from china.

A quick start to a fresh thread.

My experiences with most things shipped over directly from China through Ebay have been short of satisfying. I've never ordered anything from Aliexpress or Alibaba but am curious to see how well and honest they deliver their proposed goods.

I'll be watching from a distance .

henriksen said:

One of the other two first said that they had The BB bin of the 3000k,
When i told her that, there was no 3000k BB bin(That is correct?)...see yourself...page 4 of datasheet...
is there a better LED option, if i can't get my hands on the Z4, or the AB?...

Click to expand...

...datasheet of cxa3070...

http://www.cree.com/~/media/Files/Cree/LED Components and Modules/XLamp/Data and Binning/ds CXA3070.pdf

...page 14... see pic... bin code...

...for 3070-30F-AB-NOH

3070 – Series…CXA30 – Performance Class…70

30F – Chromaticity Bin...30F = 4-Step... ...page10 and 12...

AB – Flux Bin...AB ...page 4 and 9...

NOH – Vf Class...NO = 36-V Class – CRI Specification...H = 80 min CRI

...page 4... see table for 3000º K... flux characteristic easywhite order codes and bins...

...page 9... see table... performance groups brightness...

...page 10... see tables... performance groups chromaticity

...page 12... see pic... easywhite bins plotted on the cie 1931...

PD...upsss Abiqua and Henriksen... for 5000º K page 3, 5. 11 and 13...

...Abi... for 5000º K ...bins AB too... CRI 70 or 80?... not the top bin too...

...then boys... ...what is the top bin for 3000 K or 5000... ? ...just kidding...

saludos

AquariusPanta said:

A quick start to a fresh thread.

My experiences with most things shipped over directly from China through Ebay have been short of satisfying. I've never ordered anything from Aliexpress or Alibaba but am curious to see how well and honest they deliver their proposed goods.

I'll be watching from a distance .

Click to expand...

I've bought alot of things from Aliexpress....and fasttech.....both based out of China....all pretty good experiences..

Look at this shit..... >>>>>>>>>>>>>> (same seller as the cobs) http://www.aliexpress.com/store/product/10pcs-X-Cree-XTE-5W-LED-Neutral-White-4500-5000K-CREE-XT-E-1-5W-high/815938_1736498449.html

Driver >>>>>>>>>> http://www.aliexpress.com/item/2014-new-promotions-lowest-price-50W-1500ma-Flood-Light-Power-Supply-High-Power-LED-Driver-DC/1933707929.html

Sticky plaster thermal adhesive >>>>>>>> http://www.aliexpress.com/item/3pcs-lot-Thermal-Conductive-Heatsink-Plaster-Viscous-Adhesive-Compound-Glue-For-PC-GPU-IC/996730497.html

Choose your heatsink (small rails for me) >>>>>>>>>> http://www.aliexpress.com/store/product/FREE-Shipping-10pcs-150x20x6mm-DIY-Cooling-Heat-Sink-Aluminum-Cooler-LED/126942_1175683560.html

I could build a 50w Cree XTE veg panel for around $40-45 or a 100w for $20 more.........this is getting silly...

'Best budget Cree LED panel build' (under $50) comp anyone....? (the name needz some work... )