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Harm Reduction Notes for the COVID-19 Pandemic

LED grows

- Mon, 13 Jan 2020 17:05:47 EST CFi+T2IT No.4933240
File: 1578953147854.jpg -(147172B / 143.72KB, 1024x762) Thumbnail displayed, click image for full size. LED grows
I've never done an LED grow but wanted to do it because less electricity cost and less heat. Now that I'm getting ready to concretely do it, I'm finding out that neither of those are very true? I know about Lumens and Watts yes. But roughly, how many Watts are required for a m²?

And just how hot do they get? Do I still need to run the air-out-fan at annoying volume levels?

Probably someone here has experience with LED grows yes?
James Lighthall - Mon, 13 Jan 2020 22:27:42 EST fFKfqdzR No.4933254 Reply
I haven't successfully grown anything yet because I'm trying fogponics for my first grow ever which was insane but I am insane so c'est la vie BUT

I'm running 6 135w (iirc) HLG V2 quantum boards and they don't produce much heat. If ambient temperature is 65 F, they might raise it 10ish degrees in an insulated room without ventilation running. Nothing like HPS.
Fred Falkland - Tue, 14 Jan 2020 04:04:37 EST c0oyxbhS No.4933255 Reply
The bulk of costs are up front w/ the initial purchase. Way less heat and power consumption than HID. I've got a 3x3 tent drenched with 700watts. A good ballpark is 50watts/ft² Forget about lumens, you're looking for PAR or photosynthetically active radiation. This is measured in PPFD and the more the better, to a point. Yes, the fan can run at lower voltage, if at all.
Philly Jones - Tue, 14 Jan 2020 16:51:16 EST nj/44a2d No.4933273 Reply
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frogt poster GO AWAY REEEEEEEEE!!!!!!!!!!!!!

LED's are generally known to be more difficult to find a workable system, and not as manageable as other ways. Alas, I have no experience. Sorry
Molly Broblingstore - Wed, 15 Jan 2020 00:32:23 EST QxprRcU8 No.4933290 Reply

They suck, I wanted to do some, but I got a smaller fixture to test on a fish tank before getting the expensive as fuck grow lights. They suck.

DE HPS + MH is still the best out there and a quarter or less the cost of a comparable 100k lumen LED system, with a superior spectral distribution and PPFD per lumen compared to the LED system. Efficiency edge of LED is like 160 lm/w compared to 110 lm/w for HID. LED just isn't worth it yet. Doesn't pump red like HPS, no UVB like MH, I would maybe consider getting a narrow peak far red LED board for Emmerson effect in combination with an HPS, but that is it.
Molly Broblingstore - Wed, 15 Jan 2020 00:37:15 EST QxprRcU8 No.4933291 Reply
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Unless you are a bajillionaire, of course, in which case CMH + Gavita Light Emitting Plasma (Gavita L.E.P.) are the bees knees right now. Plus a Philips medical UVB T5 tube in there for 10-15 min a day maybe...
Martha Bevingfone - Wed, 15 Jan 2020 09:41:39 EST g4kxuJHB No.4933300 Reply
You should build your own. Bridgelux eb 2 was top of the line budget strip the last time I checked a few years ago. All you need is a DC power supply and a few wires and you can use the poke in connectors to wire it together. Stick the LED strips to a heatsink with thermal tape and you can crank it up even higher. You can make one significantly cheaper than buying it and it will have better performance than most of the ones you can buy on the market.
Betsy Fuddleford - Wed, 15 Jan 2020 23:57:31 EST v9RE1sm2 No.4933327 Reply
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This. You won't be able to bring out the full potential of your plants. The energy savings come with a price regardless of what anyone tells you.
Brooke Cottle - Thu, 16 Jan 2020 00:16:32 EST qcW2p1+D No.4933328 Reply
Man if only we had a whole board for this so frog posting fag newcomers could posit their question there...

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