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SS I believe that you're using low pressure pumps correct? Aren't you also using some kind of media too? The pumps I was designing this for are 60-70psi and will not be sitting in the reservoir. What's more if someone were to use this design then they wouldn't have to worry about a day long...

Droopy the Double Pole Double Throw relay is what I was trying to think of. To my knowledge no one makes a decent 12V UPS. I think one can be "made" though if the right components are chosen. This actually seems more simple than the relay. Tripp Lite power supplies of 15A or more capacity...

A UPS would run for a few minutes, a 4amp 12v pump could run off a 120 ah battery for 30 hours if need be. 12v is also safer to work with and shurflo makes better spec 12v pumps for your application imo

Ok so here's my idea if one were to run a backup pump power on a growing system, but I'm stuck on a part of the wiring. 120V AC Plug----->120V AC to 12V DC Converter----->SPDT Relay (This is where I'm stuck. How would you wire a Relay so that if the 12V DC converter is not putting out any...

Yikes, then you're looking at $900 to cover a 4x4 table or about $506 per square meter plus all the work to assemble them and still only getting the equivalent of ~0.5g/w for the same space/number of plants albeit using much much much less electricity.

Most average HID growers have traditionally gotten 0.5 grams/watt. To cheaply light a 4x4 table for the highest returns they would use 1 1000 watt HPS. That's 500 grams in 16 sq ft. To match that same yield for the same space utilizing CXA's at 1.3 grams/watt would require ~384 watts. At 30...

Well yeah I guess my idea isn't much cheaper and a lot more work with unknown results haha. Except the DIY COBs are also a lot of work and it's $400 for 4 of them to cover ~ a 3x3 area (that's how captainmorgan did it) as I recall. I know he broke the gpw barrier but I also can't remember how...

So I see you guys making your own COB LED lights and it just looks like a lot of work. So I have to ask...has anyone thought of mounting up a bunch of these? http://www.ebay.com/itm/Ultra-Bright-MR16-GU10-E27-Dimmable-CREE-LED-COB-Spot-down-light-bulb-6W-9W-12W-/301020298272 You can get the...

I am not in China, but I did just get back from vacation to Canada. They use Epistar and some other brand perhaps the 5w chips are of another brand. I guess the 200 MOQ could only be shipped to 1 person but they said they would talk to their engineers about improving their lights although I've...

She said with an order of 200 units she could produce them but with the higher quality leds the price would be steeper. She would have to source the leds and speak with her plant manager to determine a price. Is this something you all would be interested in and should I start a new thread...

Am I spot on or not? Hi Anna Lee, We spoke before about the 1200 watt mars ii light. I have decided that is not the best choice in lighting. My reasons for this are because of: 1. Spectrum - I know if you look at a spectrophotometric analysis of photosynthesis it looks like plants don't...

That's twice someone has mentioned CMH, what does that acronym stand for? Edit: Sounds like Ceramic Metal Halide, but a search for that in the title brings 1834 results

I just got done speaking with LG-LED over in China, I asked them about producing an all white light at 3700 kelvin just like the XGS 190. He said they'd have to lower the amperage vs. their standard light so it wouldn't be as bright but would draw the same. He said they use epistar chips and...

I did read the whole page linked that fast, and I've now finished reading the two parts more in depth. I'm not saying that because it's electrically inefficient that it's photosynthetically inefficient as well. I just conceded that. I'm saying that in the study they got the same dry weight...

Ok so I read that...and it sounds like using green light is again not worth it. The green LEDs use more electricity to run. "Twenty-five percent green light could substitute for the same percentage of blue light without affecting fresh weight. However, the electrical efficiency of the green...

Ok, so I eat my words twice and apologize. Plants definitely do use green light. Check out the "Higher Plants, Photosynthesis and Green Light: Myths Debunked" thread on ICMag. They cite that same study and then some. PetFlora you're not exactly right about "activating". There are...

Hi Everyone, I'd like to first state that I totally understand that there are a number of factors which come into play on yield. However, I am also curious what the best returns are on the crops that you've grown and what the conditions were such as method of grow, temperature, CO2...

PetFlora, we had this discussion in another thread. You told me where to find the journal that said green was needed and then I only found one that said it wasn't. If you show me a peer reviewed article I will reconsider. I've done mass spectrometry before on plants personally, there's even a...

Hyroot, I know, I was on aliexpress talking with Anna Lee last night the owner of the business. I'm not sold on them either as I don't know how they picked their spectrums or which chips they're using exactly. They list like three brands on the site but told me personally they use epistar and...

I've seen in a Cree thread here that 30-35 watts per sq. ft is max for LED and then over at 420 magazine I've seen the same recommendation on LGLED lights by a guy running a 1600 watt (780 draw) mars ii. Has anyone tested this either? I know the U.S. govt capped it at 1500PPF but that was...