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YES AB's are the newest and slightly better than z4's, but they are both very good for that price. I have Z4's

I broke a couple of taps in the heatsinks before, what f'n bummer. I have a drill press now and take my time with the tap. It's much better now:eyesmoke:

They are Z4's, Thank you.

$$$$ more than I'd pay. That will buy a lot of COB's.:joint:

Most use meanwell's I think SDS just had a thread on drivers here yesterday. Some just run 1 some 2 some3 and some run 4 and maybe more that I don't know about. I have a few Inventronics that are 4 channel, abunch of MW's that just do 1 and too many to list

It's Alive! My latest creation a 4 CXA3070's running @ 700mA. The wattmeter said 126w that is fans running fast ect. I took 2 of my old lights apart and made this one. The lights weren't that old about 6-7 months. One was a spare along with my Hans panel that is temporarily over a Lemon Kush...

I have lots of extra drivers if you need any.

I know that some do the 5000k mix, it's all good. I use some far red to put mine to sleep (or work) in flowering the last 10 min. I have enough stretch without the 5000k

That depends on how hard you run them, 25sq. feet, I'd say at least 25watts per sq ft. @ 1400mA you would need about 12 cob's. I run mine at 700 and 1400 and 1050mA IN DIFFERENT closet type closures. 3000k for my bloom and 5000k for vegging( I VEG @ 800mA. SOMEONE ELSE can give you better...

Then there's Alpine 11 heatsink's or Heatsinkusa, Egghead has the alpines cheap..

Here's a start, good price on AB's or Z4's http://www.aliexpress.com/store/product/Freeshipping-1pcs-Cree-XLamp-CXA3070-led-74-117W-COB-EasyWhite-5000K-Warm-White-3000K-LED-Chip/815938_2052849889.html

I checked each for DC volts 36.6-7 each. All are running equal, maybe it's the watt meter will check it on others later.

there is 4 cobs on it, and I can't see anything wrong with it. It's not getting too warm or hot anywhere. ?

Mine was slightly used when I got it, but it was ok for vegging but not flowering. Ended up with CREE COBs:weed:

4 CXA's on the pictured driver, will replace 2 CXA3070'S @ 1400mA.:cool:

It's hard not to have some China parts no matter what you have. Some are better than others, CREE has Chinese plants that build to CREE specs( do they really? ) I had a Chinese light from ebay that was impressive for a 300w light that only put out 88w's. I got 1/2 gram per watt with it. I looked...

I have an update on watts for the Inventronics 160w quad channel driver. I was looking at my lights the other day and noticed one of four was out, these are hooked to the Inventronics. I did some dinken around and found a bad connection and fixed it, now it's reading 171w's with just the driver...

Seattle Washington State football team world champions:grin:

Has anyone seen or used this http://www.specmeters.com/lightmeters/quantum-meters/ http://www.licor.com/env/products/light/quantum_sensors/

Go seahawks is right.