DiY LED - Cree CXA3070

Where did you find CXA in EU?

I bought mine from mouser.com. They should ship to all of Europe. It was their Swedish division that billed my order, but they sent them from the US.

Skaumannen said:

I bought mine from mouser.com. They should ship to all of Europe. It was their Swedish division that billed my order, but they sent them from the US.

Click to expand...

Did you have to pay any taxes that where not billed by mouser or deal with customs?

Digikey.com is another option, free shipping from EUR 65 on as well.

For parts sourcing check octapart.com

I only had to pay the IVA, where I am from you have to pay IVA if the value is above 25usd. And the only way to get around it is to buy from China, they always say value is 10 usd. Ups sent me an invoice a few days after they arrived. shipping was 5 Usd if I remember correctly. The leds arrived in 4 days

Well...It took a long while, but 35 cxa3070's are running @1500mA (forgot the exact amps) with active cooling and have 5 cobs left. Each string has 315 watts without the fans. Every fan has its own power source of 12 volts, and the fans together it makes a hell of a noice. Going to remove the individual power sources and going to use one power source per 5 fans. My goal is to run them on 8 or 9 volts because it will be a lot quieter. After this run I am also going to adjust the wiring so it will be a lot safer to work around it.

Total 2205 watts of 3070-power on about 3 square meters, 40x 11 liters.

Plants came in two batches because I had to much lights and to few plants so I planted some more after a few weeks.

Some pics:

happy75 said:

Well...It took a long while, but 35 cxa3070's are running @1500mA (forgot the exact amps) with active cooling and have 5 cobs left. Each string has 315 watts without the fans. Every fan has its own power source of 12 volts, and the fans together it makes a hell of a noice. Going to remove the individual power sources and going to use one power source per 5 fans. My goal is to run them on 8 or 9 volts because it will be a lot quieter. After this run I am also going to adjust the wiring so it will be a lot safer to work around it.

Total 2205 watts of 3070-power on about 3 square meters, 40x 11 liters.

Plants came in two batches because I had to much lights and to few plants so I planted some more after a few weeks.

Some pics:

Click to expand...

Nice happy! Forgot you had a big build going.

Those are the nuventix coolers? Do they stay cool?

Hope everything works well for you

Amazing, Happy! simply a wonderful feat of engineering.

Positivity said:

Nice happy! Forgot you had a big build going.

Those are the nuventix coolers? Do they stay cool?

Hope everything works well for you

Click to expand...

They are cooler and fan from Mechatronix. They can cool up to 20.000 lumens and 200 watts dissipation. They stay very cool. I have also some other herbs that never grew outside in the sun but under this light it grows and grows. We will see in a few weeks how its going.

Wow tons of CXA power and lots of hard work there, nice job happy that will yield some serious buds!

happy75 said:

They are cooler and fan from Mechatronix. They can cool up to 20.000 lumens and 200 watts dissipation. They stay very cool. I have also some other herbs that never grew outside in the sun but under this light it grows and grows. We will see in a few weeks how its going.

Click to expand...

Will you be doing your own thread?

Would love to follow along

Outstanding work, Happy!!!

PetFlora said:

Will you be doing your own thread?

Would love to follow along

Click to expand...

Not at this moment. I am halfway now. As this is my first time ever and with led and cocos, I will make a new thread for next batch. I think I can use your input, to grow some nice buds.

Are you going to be using 730nm at lights out for 15 minutes?

happy75 said:

Not at this moment. I am halfway now. As this is my first time ever and with led and cocos, I will make a new thread for next batch. I think I can use your input, to grow some nice buds.

Click to expand...

Great looking build and grow happy. I imagine 2200w of cxa is gonna give you some serious buds. you should detail your build of the lights for posterity.

happy75 said:

They are cooler and fan from Mechatronix. They can cool up to 20.000 lumens and 200 watts dissipation. They stay very cool. I have also some other herbs that never grew outside in the sun but under this light it grows and grows. We will see in a few weeks how its going.

Click to expand...

Have a link to the product number? Looks fantastic!

Wow happy! very impressive. Wow! nice setup.

Forgot to mention, I was unable to use the big capacitors to repair the power factor of my LED drivers (800mA drivers from perfectdeal_us). The capacitors are able to realign current and voltage waveform but in my case the low power factor is caused by harmonic distortion of the current waveform. No biggy though, can resell the caps or use them for some other project. I don't mind having a poor power because the current draw is only about 9 amps per circuit, but it would be nice to have it corrected so it would be greener/cleaner and more easily run off the grid someday.

Led + organics = top notch

Most recent batch finished on time (7.5-8.5 weeks) Just finished trimming them and there were some new flavors to test out.
Cali Connection - Purple Chem #2 - raunchy meat fuel - nice nugs
Cali Connection - Purple Chem #4 - chemmy meat fuel - nice nugs
Rare Dankness - Scott's OG - great yield and great nugs, no larf - no hermy
Rare Dankness - Lee Roy OG - Top Notch flavor, yield and great nugs - no hermy
G13 labs - Pineapple Express #2 - awesome nugs but nothing extraordinary about it
Dinafem - Dinachem - strong flammable fruit smell - nice frosting - no hermy, not chemmy
Cali Connection - Green Crack - very fast finishing but low, plain aroma
HSO - Green Crack - awesome nugs but nothing extraordinary about it
HSO - Purple Train Wreck - very flavorful and frosty but very larfy - will try this one again though
HSO - Lost Coast OG - awesome nugs but nothing extraordinary about it - low odor
HSO - Desert Diesel - top notch flavor and great yield. does get a few early herm balls on lowest branches but no beans so maybe it is sterile

Overall looks like it will be a great harvest, numbers in a week. Once they were finished I added a few more modules so tent2 is 660W dissipation and tent3 is 625W dissipation. The real standout for this batch was Lee Roy OG. Similar flavor to the Kandy Kush that I love so much and the Desert Diesel. From a few dozen OGs I have tried so far these have best flavor in my opinion but hard to describe. Very strong flammable OG perfume, both sweet and spicy. The Purple Chem gets second place and is the only variety I have come across so far that has the Chem flavor, disgusting in a good way lol.

what are you using to cool the room happy?