Futuregrow wrote: ↑Sat Jul 14, 2018 10:46 amI don't know if you can google the light field concept, it's just something I figured out (something fairly obvious I would have thought too). The point essentially being to use heaps of leds spread across the whole canopy to blanket it evenly, instead of having a super powerful bright "sun" in one spot (think HPS, or a big bright cob).unkle_psycho wrote: ↑Fri Jul 13, 2018 4:28 pmWill google the light field concept. I hardly even use social media. My interests often lead me to RIU and other places but sometimes I even stop reading threads that interest me, because of the emotional pollution. This place is quiet, but very nice.
This method happens to carry with it the advantages of greater efficiency and less heat too.
I think you can get those CO2 bags, I forget what they're called but they're essentially a sack that you put holes in and it sits there with microorganisms in it, putting off a bunch of CO2 as a metabolic byproduct.unkle_psycho wrote: ↑Fri Jul 13, 2018 4:28 pmI have just built my first led, but only got to use it for about a week before the summer. I was amazed by the penetration, but ended up heating the room with more watts then I saved from switching out of HID I'm thinking about a well insulated box with CO2, since finally heat is something we have to generate here anyway. In hot environments leds are a no-brainer.
Hmm do you have old LEDs or something? Or are you just driving them hard?unkle_psycho wrote: ↑Fri Jul 13, 2018 4:28 pmI think the potential gains in terms of penetration are greater then the gains in efficiency, although they are great too... I just visited a friend and he had some new gen HID which is almost as efficient as my leds, but I have over 1000 bulbs, and I can bring my lights crazy close.
Here you go:unkle_psycho wrote: ↑Fri Jul 13, 2018 4:28 pmIf you run into any studies on max light intensity, I would like to see one. I've been goofing around, and doing my own tests, and assumed that the max intensity would vary by spectrum. I saw friends having problems with early chinese 50-200w leds, and their light intensity was not that high (in my subjective opinion). I went home and put a bunch of different sprouting plants (basil, parsley, coriander, some cabbages, chilies etc.) right under a 730w LG sulfur plasma... perhaps 20cm from the bulb. They all grew great. With HID it always seemed to me that any damage came from heat. The plasma farts all the heat from its rear side, and grows plants great even 2m away.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3550641/
Discussed here:
https://loudbank.com/maximize-cannabis- ... %B5molm2s/
And here:
https://www.rollitup.org/t/max-ppf-ppfd ... o2.921830/
Here's a nice simple graphical guide by Fluence:
http://fluence.science/wp-content/uploa ... .27.16.pdf
Also just found this which looks like a gold read if you're interested in these plants:
https://www.researchgate.net/publicatio ... s_sativa_L
And one about CO2:
https://www.researchgate.net/publicatio ... els_of_CO2
This idea about benefiting more from bringing lights close is because halving the distance to the plants (for a single lightsource) should increase intensity more then efficiency gains. Spreading light out and getting it closer is really huge.
The co2 bags have mushroom myecelum, I think. Was thinking about getting the gear and making them myself, since they would probably cost 80e per grow. They seem to be most effective for 3 months, and people seem to put multiple sacks in a room.
Thanks for the links! awesome