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There are so many factors involved in optimizing a light source for a given situation. I'm sure many people would chime in if you created a thread giving us insight into your specific environment and needs. Great folks on these forums.

The inefficiencies of running a PC PSU, plus the buck driver needed to convert the VCD, plus the inherent lower radiometric efficiency of chinese COBs, coupled with the cost of heatsinks and fans, make a Ceramic Metal Halide (CMH) a much better option, especially around the 300 watt, and 300$...

PC PSU + buck +chinese COB = What's the point. Get a 315W CMH you'll get much better results and the bulb will probably last longer than the LEDs :lol:

Was this grown with the washline upgrade, or simply by wrapping the strings a-la-christmas tree style? One things for sure, these Nomas are killing it!

Hooking up 2 vero 29s to that power supply in parallel would be an excellent way to destroy them. I don't think it is worth running the veros as hard as you plan to 24/7. Cooling them would be no small feat and could possibly end catastrophically (just assuming the worst case, not implying...

Thanks for the reply. I will go bare with the COBs as an extra foot of vertical would be too much to loose in my application, and cutting down the lenses to a wider angle would be difficult and leave a sharp edge. I may however drill and tap 4 holes per COB in order to be future proof should...

If I may speak to your questions; The drivers look to be the inventronics 190v 1.05A, which are the same as the meanwell hlg-185h-c1050s I will be using. They are single output high voltage (somewhat more dangerous) but have the best efficiency offered. If you want a safer voltage and plan...

Newark has the best price I have found on veros. Last I checked only mid 30s on vero 29s. Also, the have a 10 year warranty as of the 15th of this month. I thought about the series parallel on the hlgs but ended up going for cxa 3070 on 1050As, as I was concerned about possible runaway...

Thermal interface material.

Well, they did warn you to wear safety goggles :P

I've been waiting for this thread from you again. Looking good, subbed up for the ride.

Great answers so far. You could consider using a 2 part thermal adhesive mixed with 1:1:1 with a thermal paste. I haven't tried it myself but apparently it is much easier to remove. I would personally use a non conductive paste (think artic alumina instead of artic silver). Also, you have to...

This is how I understood they functioned when I ordered mine. good to have confirmation from ideal. As the holder is tightened downward the white nubs are forced upward from the heatsink surface, and higher relative to the holders frame. This nub (which is pressed against the heatsink) and...

how many do you need to grow?!

That was one of my posts. I was inquiring into the estimated efficiency of the cxa 3070 COBs at various input currents in order to finalize that aspect of my design. The meanwells in question are the hlg-185h-c700 or hlg-185h-c1050. Except for the high voltage that they output (up to 430V on...

Be sure to let us know how those work out :) I was also looking into this option. http://www.digikey.com/product-detail/en/2-2154857-2/A107375-ND/3829761 I think they are about 2$

You've outdone yourself Sir! Your contributions are outstanding. Looks like I'd lose 4% going with the Vero 4K over the z2, and 12% over the z4. Now it's a matter of deciding if that loss is worth it for the advantages the Vero line offers, namely; more available spectra, mounting holes...

Yes, I've seen those and the used z2s up for auction. Does anyone know if they are a forum member somewhere? I'd like to conduct business outside of ebay if possible. I'm a bit apprehensive about getting an item shipped internationally that is marketed as a grow light in the description and...

Supra, I haven't done any pixel counting and haven't tested the COBs in person yet, but my quick numbers don't seem to add up with yours. I may be missing something, but here is what I gather from the datasheets of these two at 2100ma and 1925ma respectively; Vero 29 4k (closest to the cree...

Hey Supra, Haven't been around really as I have had a couple things in life to attend to. You are correct, the 33.30 price in multiples of 20 is from Arrow, as some others have found and posted. Bridgelux updated their data sheets in February and have posted information regarding the operating...