DiY LED - Cree CXA3070

this would be the proper driver for a 12v DC step up application
such as a mechanic's vehicle or solar bank correct?

http://www.jameco.com/1/1/53405-ldh-45a-1050-dc-dc-step-constant-current-led-driver-12-volts-1050-milliamps-45-15-watts.html

indianajones said:

this would be the proper driver for a 12v DC step up application
such as a mechanic's vehicle or solar bank correct?

http://www.jameco.com/1/1/53405-ldh-45a-1050-dc-dc-step-constant-current-led-driver-12-volts-1050-milliamps-45-15-watts.html

Click to expand...

Yeah that is a DC to DC step up constant current driver. They have two versions A and B the A's work off 12 volts the B versions run off 24 volts. They would work off any DC source if the voltage and amperage is sufficient. So yeah car batteries solar bank or even a 12 or 24 volt DC power supply and your in business.

indianajones said:

got my heatsinks in today.

fuckers are huge, and weigh about 27 lbs. didn't know what else to use as
a size scale so i used my bass.

Click to expand...

Thats one way to scale a pic, haha.. nice work, man.. Can hardly wait to get our DIY LEDs up too! Best of luck.. share your results anytime at our place.. aka thread.

Edit: Shit, i wonder how much our 36" heat sinks will weigh. Thankfully only 3.5 inch wide though.

@Supra big up man, respect for the LED pioneering and testing. Looking forward to the copper and red results..Just curious, if you had a 4x8 ft space what do you think the ideal lighting would be DIY wise.

Layouts and costs somewhat aside, what would be your goal for overall numbers like watts and COBs. A 1000w HPS is standard for a 5x5 or 4x4 air-cooled, right, but these DIYs are so damn efficient.. that'd be like 400w DIY per 4x4 So would 800w be ideal or insane?

Cree's are a bit much at the moment tbh so going with Vero's for the whites. Building several 36 inch bars on single heatsinks, with multiple white COBs in parallel ran soft of a single driver.. i think they gonna be 40w each, 137 lumens per watt. But still have to add blues and reds on their own little sinks with their own drivers, and consider totals..

That said, in your opinion, how huge is it to have both red spectrums, far and deep? It will be a flower and veg room, depending.
Appreciate the input, big time mon. New subject for me..Really gotta up the output until the everyones got their licenses finalized.. the fam is hurting, especially grandma!
Big up from Canada

800w is way overdoing it on a 4x4. you want 25-35 watts per
square foot with LED. that means anywhere from 400-600w
for a 4x4.

DonTesla said:

Edit: Shit, i wonder how much our 36" heat sinks will weigh. Thankfully only 3.5 inch wide though.

Click to expand...

I was looking at 3.5" profile from heatsinkusa for 32" long bars for myself and if Im not mistaken the profile weighs .15lbs per linear inch so 36" should be 5.4lbs of aluminum per 36" long bar. Lots of meat.

If I build my newest design, I would be running 5x 3.5" profile x 32" long and at 24lbs of aluminum total, almost seems like overkill for my design but probably about just right.

indianajones said:

800w is way overdoing it on a 4x4. you want 25-35 watts per
square foot with LED. that means anywhere from 400-600w
for a 4x4.

Click to expand...

Haha, Lets disregard the 4x4 talk. My bad.

It's 8 x 4 really, so 32 sq ft ..
so about 800w to 1120w depending on whether 25 or 35 watt per foot?

Okay. Great. So lets say 1000w of LED is the goal.. That's about 32 watts per sq ft

We have a 400w led panel that can help us transition.

For ease of designing, lets pencil in that we opt to do two 500w DIY LED set ups then, 500w now, and the other 500w after. Total 1000w.

About what percentage of total watts do you want represented by each spectrum?

Blues
Far reds
Deep reds
White(s)

Then I can start working backwards from the end goal..
Big ups from CowTown!

DonTesla said:

Haha, Lets disregard the 4x4 talk. My bad.

It's 8 x 4 really, so 32 sq ft ..
so about 800w to 1120w depending on whether 25 or 35 watt per foot?

Okay. Great. So lets say 1000w of LED is the goal.. That's about 32 watts per sq ft

We have a 400w led panel that can help us transition.

For ease of designing, lets pencil in that we opt to do two 500w DIY LED set ups then, 500w now, and the other 500w after. Total 1000w.

About what percentage of total watts do you want represented by each spectrum?

Blues
Far reds
Deep reds
White(s)

Then I can start working backwards from the end goal..
Big ups from CowTown!

Click to expand...

100% white(s).

DonTesla said:

Haha, Lets disregard the 4x4 talk. My bad.

It's 8 x 4 really, so 32 sq ft ..
so about 800w to 1120w depending on whether 25 or 35 watt per foot?

Okay. Great. So lets say 1000w of LED is the goal.. That's about 32 watts per sq ft

We have a 400w led panel that can help us transition.

For ease of designing, lets pencil in that we opt to do two 500w DIY LED set ups then, 500w now, and the other 500w after. Total 1000w.

About what percentage of total watts do you want represented by each spectrum?

Blues
Far reds
Deep reds
White(s)

Then I can start working backwards from the end goal..
Big ups from CowTown!

Click to expand...

i agree, 100% whites. simplify everything you can and they seem to
work just as well watt for watt and gram for gram.

vero is a less expensive option, cree costs more. both seem to do
one hell of a job.

Really?!

for bridgelux vero 3500 or 4000k, for cree cxa3070 3000k.

DonTesla said:

Haha, Lets disregard the 4x4 talk. My bad.

It's 8 x 4 really, so 32 sq ft ..
so about 800w to 1120w depending on whether 25 or 35 watt per foot?

Okay. Great. So lets say 1000w of LED is the goal.. That's about 32 watts per sq ft

We have a 400w led panel that can help us transition.

For ease of designing, lets pencil in that we opt to do two 500w DIY LED set ups then, 500w now, and the other 500w after. Total 1000w.

About what percentage of total watts do you want represented by each spectrum?

Blues
Far reds
Deep reds
White(s)

Then I can start working backwards from the end goal..
Big ups from CowTown!

Click to expand...

Call up Arrow and order a 20 pack of 3000k ab bin 3070's and Jamco for 1400ma meanwell drivers and New Egg for heat sinks.

I'm running 16 of them over 36 sq ft and it works very well.

tenthirty said:

Call up Arrow and order a 20 pack of 3000k ab bin 3070's and Jamco for 1400ma meanwell drivers and New Egg for heat sinks.

I'm running 16 of them over 36 sq ft and it works very well.

Click to expand...

DonTesla said:

Haha, Lets disregard the 4x4 talk. My bad.

It's 8 x 4 really, so 32 sq ft ..
so about 800w to 1120w depending on whether 25 or 35 watt per foot?

Okay. Great. So lets say 1000w of LED is the goal.. That's about 32 watts per sq ft

We have a 400w led panel that can help us transition.

For ease of designing, lets pencil in that we opt to do two 500w DIY LED set ups then, 500w now, and the other 500w after. Total 1000w.

About what percentage of total watts do you want represented by each spectrum?

Blues
Far reds
Deep reds
White(s)

Then I can start working backwards from the end goal..
Big ups from CowTown!

Click to expand...

Yea, and grab me some too! Hahaha jk

DonPetro said:

Yea, and grab me some too! Hahaha jk

Click to expand...

I know right.......impossibru to find in small quantities

kkman said:

Sorry to bother you again Super, but I ordered a few of the items you mentioned and they just arrived.

So my first question is, looking at the diagram they provide I cant figure if you can connect it to either ac line.
Next how should I connect the thermal switch sensor to the cob TC point?
Lastly I can see how I can connect the switch to a driver when it runs one cob, but how could I connect two switches to two cobs running off the same driver.

If you can help, it would be great.

One last question if I may, Mouser has the ab cxa3070 97 in stock now for £44.53 and the z2 big at £27.44, since the AB bin is almost twice as much as the Z2 bin, would it be worth buying one AB and running it at 1400ma 20-25cm from the canopy or buying two Z2 bin and running them at 700ma 15cm from the canopy.

Click to expand...

I was asking myself the same question, when you dim them, does it make that much different (lumen output) ?

Kuifje76 said:

I was asking myself the same question, when you dim them, does it make that much different (lumen output) ?

Click to expand...

You can check for yourself in Cree PCT. Great tool.

If I am not mistaken, Supra (or someone else) calculated LER of CXA3070 (80 CRI 3000K) to be 323 lm/W (although for comparing between bins it's kinda irrelevant).

Here we go:
6703lm at 52W translates into efficiency of 40%.

2x3260lm at 48,7W is 41,4% efficient.

Conclusion: 2x Z2 can have better distribution of light over canopy and is little more efficient than 1xAB.

2x3260 = 6520 <-> 6703, better light distribution but not more lumens...

You're right. At 700mA, 2xZ2 also dissipates 3.3W less. You can run them at 800mA to achieve almost same efficiency and a little higher output.

alesh said:

You can check for yourself in Cree PCT. Great tool.

If I am not mistaken, Supra (or someone else) calculated LER of CXA3070 (80 CRI 3000K) to be 323 lm/W (although for comparing between bins it's kinda irrelevant).
View attachment 3306562
Here we go:
6703lm at 52W translates into efficiency of 40%.

2x3260lm at 48,7W is 41,4% efficient.

Conclusion: 2x Z2 can have better distribution of light over canopy and is little more efficient than 1xAB.

Click to expand...

thanks for the link, most interesting...
i saw cxa3590 also with bin DB (13000 lumen), but can't find such ones, highest i found is BD (10000)

Well, the bins in PCT do not always correspond to actual available bins. CXA3590 is actually available in CD for 70CRI-min 6500K and BD for 80CRI-min 3000K. You can check in its data sheet.

Since 1400 is a little too much per square foot you would need to hang them higher thereby loosing more lumens. Lastly running two lights gives you a better light footprint and you can even run them higher up to 900ma without having to move the light higher.

The only issue is you need to pay for 2 LED drivers, 2 heatsinks and 2 fans. With my setup I can get away with running both COB's on one driver and the two heatsinks will fit under my 140mm fan, so I would need to only pay for the heatsink (£5).

Having said all that I will be getting one AB bin cob to test how big a canopy I can light with one. So far I think one Z2 bin running at 700ma at a distance of 15cm can cover a square foot using a 90 degree diy reflector.