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Where can I buy reflective film for cheap? Most of the stuff I came across on the web related to growing seemed overpriced. 20-30ft films for $100. While on Amazon I came across a Mylar kit that was something like 10x packs of 84x52" Mylar for emergency, for less than $15. Can i use these...

Any reason why two of the same drivers are used instead of a single with double the output?

I don't think spreading is an issue in a closed-system. If you want each and every corner of your grow area to receive light, then I can't really make out the difference between using a single source or a thousand sources. The reflective film, I had imagined, was to prevent spreading and contain...

Where would it spread in a closed-system (i.e. a grow box covered with reflective film all around)? I think the problem you are presenting can be mitigated by optic lenses and isn't an inherent limitation of the wattage of the lamp.

First we have to develop a synthetic self-sustained, self-propagating ecosystem on earth (or in the lab), before anything like that can be exported to other planets. We haven't been able to do that yet, not even in computer models. One reason is because we haven't yet fully figured each and...

What if you add acid to acid itself?

Hi. I've been here some years. Not sure if I did an intro. For many years I searched the web for indoor growing, lighting systems, and hydroponics, and this website always came on top in the results, so I decided to join. Don't post much, read mostly. Learning from other people's setups.

The other, more hazardous method is, passing an electrical current through the solution (electrolysis). It will kill nearly all types of microbes including fungi. https://www.ncbi.nlm.nih.gov/pubmed/9222036

If your reservoir is non-flammable, non-corrosive, can just pour some ethanol and light it on fire. That's how most instruments are sterilized in the lab. But my reservoirs are all some plastic, PE, PVC or rubber, and I use 35-42% H2O2. Kills most irritant microbes; algae growth has been the...

Any light's illuminated area would receive less intensity as the light is moved away. But why does it matter whether you have a single chip or 500 chips, when in the end they will both produce 1000 lumens? Place them both 24" above and explain what happens to the 1000 lumens given off by A) a...

So, where is all the light going if it lacks penetration? Does it disappear in the air?

I got a question about LED wattage. What's the practical difference between using a 50W cob versus 5x 10W cob? Or using 250x 0.2W chips? Don't they in they end all yield 50W worth of light? I've always believed from what I've read that the higher wattage chips yield better results, that they...

Finally got it to work. 1 6500k strip didn't work. I'm guessing bad soldering joints. I will resolder tomorrow and mount them in my setup. Just wondering what would happen if I left it as is.. would the other strips be affected? Thanks everyone for the great help!!!

I wouldn't be surprised if I fucked something up. My knowledge and dexterity in this field was limited to plugging cables in the wall, before this build, or "call an electrician before your house catches fire".

Well.. I don't have spare computer ps cords but I might have some regular power extension cords (but they don't have a ground wire i think). Will these work? If not, if I go to a hardware store, is there any specific wire/cord I should be looking for?

My build is almost complete. I will post the pics here once completed. Just one more thing I forgot to ask, what gauge to use on the "L, N, ground" terminals that will be plugged into the wall? Is ground necessary?

Here's my schematic. Just wanted to know what gauge wire to use at A and B? If my understanding is correct, A has 8.1A running through it, and B has 1.35A running through it. Can you verify please? Also, I had bought these solderless strip connectors with 10cm wire at one end. Are these okay to...

Well, the single circuit itself is 97.2W. I added 23W extra for supply so it doesn't run at max load. Thanks for the great help btw. I won't forget.

Ok great. So it's safe to use single a 240W supply to power two different 120W circuits? Also, last thing I forgot to mention, because I have 2 rolls of 5400mm each, one 6000K and the other 3blue:1red, and I want to create two circuits, each having 2700mm 6000K soldered to 2700mm red:blue, is...

So, in this diagram, you have 2x strips in parallel. Can I add more strips in parallel, given the supply gives enough amps? i.e. Can I have 6x strips at 900mm in parallel with a 12v x +10a supply? Also, (this is probably a stupid Q) the supply you linked 12v 20a for example, as with most...