Search results

Thanks for the light reading...;-)

At 1400mw 14 drivers * 50 watts each = 700 watts more or less / 25 watts a square foot = 28 sq of coverage. So about enough to cover a 5x5 table, more or less....................... Does that sound about right?? ;-)

Yup and I'll sick the CC company on them if that doesn't do the trick.

Yup, I tested every single one and they would only draw about 36 watts. The output was about 800ma as tested with a calibrated Simpson meter.

The best you are going to do today is 12 Cree CXA3070 COBS running at 1400 ma. about 700 watts = 28 watts sq ft. Read this: https://www.rollitup.org/t/diy-led-cree-cxa3070.789575/

I bought 24 of these things from this guy.....I filed a ebay dispute and he said he would give me a full refund after he received and tested them..... I did pay with a credit card, so if he tries any funny biz... there are other avenues of recourse. He did try to get me to drop the dispute...

What do you think of this driver? http://www.ebay.com/itm/50W-Watt-High-Power-Supply-LED-Driver-Waterproof-0-5A-AC85V-265V-50-60HZ-/301230995620?pt=LH_DefaultDomain_0&hash=item4622c438a4

I could use about 20 of them right now.

Supra, How many watts per sq ft? Excellent job!!! Thanks.......

IMHO..........MMJ will do just fine under 400-600 umol/s..............Also in my experience anything over 1000 umol/s created problems for me. Maybe 400 is a little low, but at 600 my grow does really well. All measured with a Licor. If you look at the plant as a machine.........running it...

The pics don't do them justice, these things are really bright.

Cool.....What is the area of the grow? Thanks.............

That would be basically my plan.

I'll be burning them at 50 watts / chip more or less, on CPU heatsinks.......I'm cheap and lazy!!

My last test at 25w a sq foot was less than stellar. 35w a sq foot was ok. Right now 40w a sq foot (CMH and LED) is doing better that any HPS has ever done for me by double! At 50 watts a chip, I also think that spreading them out as much as possible would be the hot ticket. Parts are on order...

3x3 x50w a sq ft= 450watts. That is the rule of thumb for HPS. Hmmmmmm. 4 ea CXA3070 3000K Z4 @ 1.4A = 52W @ 39.3% efficient........ That would be 208 watts to cover the same 9 sq ft. 23.1 watts per sq ft. Comments??? I sure as hell hope this works!!!!!! At 40w sq ft of combined led and cmh...

#1) You can't look at lumen output for a direct comparison. The delivered lumens from an LED will be greater than the delivered lumens from an HPS lamp of similar brightness. The optics on an LED fixture (at least good ones) are precisely aimed for each diode. There is an acrylic or...

After rooting, let them veg for about 6 days. (produce 3 internodes) Flip to 12/12. In the first 2 weeks of flower cut off anything that looks like it has or will get longer than an inch. After the first 2 weeks of 12/12, it is what is and should grow colas, based on genetics and...

Nice info dump!!

Green Light Drives Leaf Photosynthesis More Efficiently than Red Light in Strong White Light: Revisiting the Enigmatic Question of Why Leaves are Green (2009) http://pcp.oxfordjournals.org/content/50/4/684.full.pdf