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The Vero 10 should work great. This one is rated at 126 lumens/watt at 350ma. http://www.digikey.com/product-detail/en/BXRC-40E1000-B-03/976-1173-ND/3913159 14 of them should make about 16500 lumens. 4000k is an ideal temp for what you're trying to do. At $4.64 each 14 would run $64.96 +...

How about using these? http://www.ebay.com/itm/281156277541?_trksid=p2055119.m1438.l2649&ssPageName=STRK:MEBIDX:IT Egg cups kinda fit in with the fried egg thing!

The new Vero is good news. Now that I've nearly got my light perfected, snicker snicker... Something promising for the new year. I'll bite big on a major efficiency upgrade. Now I'll have to decide what to do with the 'old' emitters. Maybe retrofit the entire house, garage and outdoor lights?

At first look I thought it's a great idea but it needs much better thermal management. That light would benefit with better cooling for sure. 2 more fans blowing directly at the heat sinks and both side fans exhausting might be enough to cool it adequately.

Dreaming is the most important thing... Al Einstein said "Imagination is more important than knowledge".

Maybe this would work as a top coat over the white on the inside of the reflector cup. http://www.amazon.com/Rust-Oleum-214944-Reflective-10-Ounce-Spray/dp/B000LNVC1M/ref=sr_1_1?ie=UTF8&qid=1418831252&sr=8-1&keywords=reflective+spray+paint

Real nice engineering job! Simple, elegant and powerful.

That is how my main light is designed. A lot of heat sink with a little airflow. With no airflow the sink tops out at 42c. With both fans running at 6v it tops out at 28c. I am pretty confident that the light will survive if the cooling fails.

So true... There's also much better lumen maintenance over time which certainly makes LED more attractive to me..

TRC Electronics may have the HLG-185H-C1050B. It might be worth a call to them since they don't indicate whether it's in stock or not on the website. The two 1.4a drivers (HLG-185H-C1400B) certainly do cost more upfront but they will run either 2 or 3 emitters each so that would give you the...

Their 1.4a version maxes out at 142v. I haven't found one with more output voltage at 1.4a anywhere. There is a limit that is imposed by the exchange from volts to amps. As the amperage increases the available voltage decreases. Ohms law. The HLG-185H-500C max voltage is 400 while the same...

The HLG-185H-C1400B max voltage is 143 which is not enough for 4 CXA3070. You will need over 160v. To my knowledge, there are no 1.4a drivers that make that much voltage. You will proably need at least 2 drivers for 4 @1.4a.

I'm a big fan of driving cobs soft because of the greater efficiency at lower currents. You could drive your 3070s at 1a rather than 1.4a and still get a lot of light with the benefit of lower temps and more lumens/watt. This driver would be a good solution for driving all 4 cobs at 1a...

To drive 4 3070s, I would use 2 of these and run 2 strings of 2. http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?search_type=jamecoall&catalogId=10001&freeText=HLG-120H-C1400B&langId=-1&productId=2189265&storeId=10001&ddkey=http:StoreCatalogDrillDownView Dimming is pretty simple...

The Vero line has a bit more red than the Cree CXA. I use the 3500k for that reason. The 3500k has plenty of red for flowering and would be OK for the little ones too. 5000k is what I use for clones, vegging and to keep my mother plant. Also, your plans look good to me. I like that you're...

Thanks! Ordering now...

As always, you've compiled a very informative tutorial for us all. I'm going to keep this wisdom handy for the next build. Thanks SDS!

This one would do nicely. http://www.ebay.com/itm/Constant-Current-Driver-for-36pcs-1W-LED-25-36-x-1W-Driver-Waterproof-100v-240v-/321329909926?pt=LH_DefaultDomain_0&hash=item4ad0c150a6 It does run at 300ma which I think is better than 350ma for efficiency reasons. I have seven Vero 10s...

I really depends on how efficiently the emitters are driven. A rule of thumb is it takes about 65-75% as much led wattage to get the same result as hps. I suggest starting with ~400w. You can always add more.

Nice comparison! I came to the same conclusion regarding the good value of the 4.6" serrated. That's what I used for my overhead flowering light.