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It is just a foot not in this book: Marijuana Horticulture: The Indoor/Outdoor medical growers bible, Jorge Cervantis page 165: "I talked with Dutch and Canadian growers who claim their plants FLOWER under a 6-hour dark and 12 hour light photoperiod. This expedited, 18 hour photoperiod regimen...

I am not sure if this is the right forum for this, but it relates to some things people have mentioned here. First, about growing in Alaska, one of the books I was reading mentioned briefly passing that some growers in Canada are able to use 18 hour grow cycle, with 6 hours of dark and 12 hours...

Nice numbers on the Vero29, I have been liking the look of them for awhile... Could some one run the numbers on the Vero 29 4000k? The BXRC-40E10K0-L at 2100mA run at 127lm/W I feel like this increased efficiency as compared to the BXRC-30E10K0-L at 2100mA run at 120lm/W Shit I just realized I...

I got 3 of the Vero 29 4000k that I am testing out. Good price, built in mounting stuff, plus the plug and play connectors for if you like. I was reading over one of Pico's old threads and he said the plant that was in between the 3000k and 5000k did the best... So we will see how the 4000k do.

Unless I am mistaken, its not just about the LEDs using less power, its also about them lasting much longer? Conventional light has to be replaced after like 4,000 hours? where as these LEDs are rated for 50,000 hours? That is about 12 conventional light replacements in the lifetime of the...

I was confused on exactly how the Wago connectors functioned, I looked it up and it makes sense now. If I am running the 3 LED drivers into one cord, I would run the first two drivers into 2 Wago 3 connectors, one positive and one negative, then run the leads out into a 3rd and forth connector...

Awesome Mr Flux! That makes things simpler I think... Lets say I wanted to make 3 lights like above, but with the Wago 222 connectors: 3x Arctic Alpine 11 plus + Arctic Silver 3x Bridgelux Vero 29 - BXRC-35E10K0-L-03 3x Pico-EZmake harness 3x Mean-Well LPF-90-48 1x LPV-20-12 (would have...

You guys rock this lined out most of the information I needed for what I have been thinking about. Arctic alpine 11 plus + Arctic Silver Vero 29 LPF-90-48 The Pico-EZmate Harness seem like one of the reasons to go with the Bridgelux Vero over the Cree CXA? Do you think its worth it to get...

Does anyone know how to do the conversion from lums to umol? Even better a graph that displays the relative flux of the viro18 series in umol.

I think you would have to look at the relative intensity and wave length (nm) chart. I think the ideal red is around 670nm, the decor put out fewer over all lums, but hit the red spectrum much much better...

http://www.heatsinkusa.com/4-600-wide-extruded-aluminum-heatsink/

This sounds a lot like what I have been invisionig. It sounds like you are envisioning a large hanging framework with 3 rows of six lights spaced about 15 inchs? That would evenly space everything, with even light coverage at maybe a foot above the plants(guessing). I assume the frame would...

I think there are several different models to deal with, assuming you are dealing with white spectrum high output arrays there are two solutions. First simple solution: Figure out the deal spacing of the lights to produce optimum coverage at the desired distance from the plant on a flat plane...

Awesome stuff guys, not only grate information, but suddenly all the calculus I am learning seems way more interesting! The viro 13 seems like the way to go, less spendy then the cree and much easier mounting and set up from the start. Seems like the lower voltage and 500mA current need should...

It's not that simple. If you are wanting to set up a string of cxa3050 you could run 3 off the power supply you are referring too. Or you could run the cxa2530s with the 700mA version, run them below the 800mA rating and run 6-7 of them. But if you wanted to build something that had 10-12...

You will only be able to run3-4 LEDs in series with the 1400mA HLG-185-C1400 at $100 a pop Plus shipping. If you think it is going to be less expensive then the parts I listed you are wrong. $100 for a 600 watt power supply, and $5-8 per ldd-1000 running 10-12 leds would be about $250 for...

I think: http://www.powergatellc.com/mean-well-se-600-48-power-supply.html plus these: http://www.mouser.com/Search/m_ProductDetail.aspx?qs=erfQA2AIGbX6Yk/3J0ulyw== Likely the best solution I have found so far.

www.oemstrade.com has been useful to me, makes it a bit easier to shop around.

Thanks lex, that does make sense, however, if they are rated from say 0-1.6 amps and the cxa3000 series takes 1-2.4 amps wouldn't it be impossible for them to draw enough current to fry them? Or would the increased current draw just result in the power supply frying instead of the LEDs. it...

So why cant these guys be used as LED drivers? http://www.meanwell.com/search/NES-75/NES-75-spec.pdf http://www.meanwell.com/search/NES-100/NES-100-spec.pdf The 48vdc versions of this seems like it would be great as LED power supplies, however, they are never listed as LED power supplies. So...