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Old 10-15-2015, 04:14 PM   #1
A.T. Hagan
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Default How LEDs Are Making Weed Better

http://www.wired.com/2015/10/leds-up...lture/#slide-5



Quote:
A few years out of graduate school in botany, Paul Gray found himself tinkering with the lights for growing Green Crack. Yeah, that Green Crack: the strain of weed so strong that none other than Snoop Dogg—according to ganja lore—bestowed it such a name. Gray wasn’t just messing around, though. He found that growing Green Crack under light-emitting diode lamps could make the already potent strain even stronger.

Gray works for Illumitex, one of many LED companies catering to the cannabis industry. As more states legalize recreational and medical marijuana use, the business is growing and professionalizing. And LEDs, for their part, have recently gotten cheap enough to be more than a novelty. The once-underground world of indoor cannabis growing is coming out into the light—a soothing, magenta glow from LEDs.

LEDs offer two main advantages: One, they give off specific wavelengths of light that can be fine-tuned to the plant and its stage of growth. That’s why you see so much blue mixed with red, or magenta, light. (More on that later.) And two, they use way less energy—up to 60 percent less than traditional bulbs, by some accounts. Indoor marijuana farms are a notorious energy suck, and stories abound of illegal farms getting busted by their electric bills. So yes, illegal farms have an obvious incentive to cut their power bills. So do legal growers, though, who can save money and burnish their eco-conscious reputations at once.
The rest at wired.

With a much lower power consumption and the ability to tune the wavelengths of light used more specifically for optimal plant growth growing under artificial lighting has become much more interesting.

Never mind growing marijuana, there are other circumstances that make it interesting.
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Old 10-15-2015, 04:19 PM   #2
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Agreed, Alan. I've been looking at it lately for a possible hydroponic or aquaponic veggie/berry greenhouse if we move to the lake. Winter sun just doesn't cut it up here.
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Old 10-15-2015, 09:20 PM   #3
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I wonder if those lights could replace the uv light I turn on for Jake. His light is hard on my eyes and because it is in a overhead fixture there is no avoiding it.
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Old 10-15-2015, 09:42 PM   #4
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Quote:
Originally Posted by LvDemWings View Post
I wonder if those lights could replace the uv light I turn on for Jake. His light is hard on my eyes and because it is in a overhead fixture there is no avoiding it.
Doesn't look it. UV is about 450 and lower I think.

But you can get LED in all kinds of spectra. The problem is finding one that goes into an Edison socket.

Of course if you knew someone handy, they could always pick LEDs out of the UV spectrum area and build something.

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Old 10-15-2015, 10:13 PM   #5
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Lv, our under cabinet lighting in the kitchen is the LED ribbon tape. Peel and stick, cut to length. It comes with a remote that allows for colour change. Bought it at HD, been working for 3? 4? years since we redid the kitchen. FWIW
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Old 10-16-2015, 07:36 AM   #6
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Information on best growing wavelengths and required
intensities would be useful ( for vegies not weed ) .

I want to get in to it .

..
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Old 10-16-2015, 08:32 AM   #7
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Information on best growing wavelengths and required
intensities would be useful ( for vegies not weed ) .

I want to get in to it .

..
Just Google "LED growth spectrum" or something else like that.

Last night when I posted the majority of the articles were about LED for marijuana or subtle hint articles.

The same process would apply for veg.

I am sure that there are very optimal wavelengths for different kinds of plants but anything they sell for MJ would be within +/- 1σ for veg.
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Old 10-16-2015, 08:52 AM   #8
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Quote:
Just Google "LED growth spectrum" or something else like that.
Yes , thanks , I know , just feeling lazy and hoping somebody would
make it easy for me .

..
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Old 10-16-2015, 09:06 AM   #9
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Well, I'm curious to know as well so I just did a quickie search.

Plant Productivity in Response to LED Lighting
http://hortsci.ashspublications.org/...43/7/1951.full

Wavelength Influence on Plants
http://www.illumitex.com/impacts-colored-light-plants/

Precise LED wavelengths spur plant growth
http://www.ledsmagazine.com/articles...-magazine.html

This is just a stub for the .pdf of the article that is the whole thing. You can access it through their site.

How To Choose the Right Grow Light
http://gizmodo.com/5903134/better-know-a-grow-light

A brief glance at shopping for plant growth LEDs reveal a wide array of products ready to use. Definitely looks doable once one has done some reading to come up to speed.
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Old 10-16-2015, 01:15 PM   #10
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Quote:
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Yes , thanks , I know , just feeling lazy and hoping somebody would
make it easy for me .

..
No Graduate Degree for you!

---------- Post added at 12:15 PM ---------- Previous post was at 12:11 PM ----------

I was just sitting here thinking, and laughing, at a scenario where plant growth LEDs would go on the Precursor List and sales monitored.

Some old granny gets their door kicked in and greenhouse searched because she is using them to make sure her tulips and veg grow well in the winter.

LOL
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Old 10-16-2015, 03:32 PM   #11
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They're also big in the aquarium world, too. Especially reef aquariums. Far less heat output.
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Old 10-16-2015, 07:09 PM   #12
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Watch out for that UV stuff. I got radiation burns (eyes) using that (15,000 watts). The leds and bases (very high power) can be found at digikey.com and mouser.com.
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Old 10-16-2015, 08:36 PM   #13
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Quote:
Originally Posted by andy View Post
Watch out for that UV stuff. I got radiation burns (eyes) using that (15,000 watts). The leds and bases (very high power) can be found at digikey.com and mouser.com.
My fine feathered friend needs the uv light http://zoomed.com/db/products/EntryD...ID=2&EntryID=8
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Old 10-16-2015, 11:16 PM   #14
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LvDemWings ... for heavens sake protect your eyes somehow ,
do not wait for the damage .

..
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Old 10-17-2015, 05:17 AM   #15
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Quote:
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LvDemWings ... for heavens sake protect your eyes somehow ,
do not wait for the damage .

..
I was building a 15,000 UV chemical reactor. I had on glasses, safety glasses, and a welders hood. It still got in. I think it got in the back when I turned around. I should have worn goggles. It took 6 hours for my eyes to go to sandpaper. Thank God I was already knowledgeable about what to look for.

I have pictures around here somewhere. I think I figured I used 6 miles of wire per reactor. What a beast!
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Old 02-05-2016, 01:38 PM   #16
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Thinking inside the box: Old shipping containers are repurposed into a FARM growing lettuce and herbs - and it's raking in $15,000 a month
Quote:
Innovative farmers are using shipping containers to grow fruit and veg
Huge crates are kitted out with ultraviolet lights and an irrigation system
One entrepreneur harvests 6,000 plants a week and makes $15,000 a month
That is 80 times more produce reaped from same space on a normal farm
Freight Farms provides the containers in Boston and insists that making a profit is easy
http://www.dailymail.co.uk/news/arti...000-month.html


Old shipping containers are being repurposed as farms, with
people creating their own highly efficient super greenhouses to
grow produce on an industrial scale. Pictured, Freight Farms
founder Jonathan Friedman



The company kits out the containers with ultraviolet lights,
irrigation systems and racks to maximize space inside the crates



The containers were originally used to ship frozen meat so
are fully insulated, providing the perfect conditions for growing
crops


This is interesting. I wonder what the power costs to keep them air conditioned in the summer would cost?
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Old 02-05-2016, 01:44 PM   #17
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Wow. That IS interesting, Alan. I wonder about the quality of the vegetables grown in those boxes, since fresh air, good soil, sunshine, and rain all contribute to the nutritional value of our produce. Is it pretty but empty nutrition or equal to naturally grown?
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Old 02-05-2016, 02:04 PM   #18
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I just put one up for my saltwater tank and have one coming for seedlings. The blue red spectrum is interesting but I think I'll add a white LED to brighten the tank. I ordered them from Amazon.

I think they fall into the same spectrums as suggested in the 'Healing with Light' thread
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Old 12-25-2016, 12:10 PM   #19
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bg, have you grown seedlings with the LEDs yet? If so, how did you find it worked? Like?

Just received this today for Christmas. Planning on starting some seedlings (tomatoes, peppers, maybe greens) early January, here in the basement before we move. Will set up a dedicated tent in the new house in the hot tub room, before we build a greenhouse. Will be trying pineapple and hopefully picking up a banana plant in the spring. Also hoping to get two avocado plants as well.

240 Watt Full Spectrum G8LED Veg/Flower

http://www.dormgrow.com/240-watt-led-grow-light.html
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Old 12-25-2016, 01:00 PM   #20
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Rb I am not far off doing exactly that .

Currently setting up my first small hydroponic system as a pilot
with a view to making others after I gain some experience.
As I sit at now at my desk the floor space behind me is dogs breakfast
of pumps , valves , pipes , tanks , grow trays and plastic pots of
various sizes .

Led lights will at some stage be added .

I think you live in an area where Led lights along with some
heating would be ideal , even essential .

ps ... your link did not work for me .
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Last edited by Ross; 12-25-2016 at 01:06 PM.
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Old 12-25-2016, 01:32 PM   #21
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Hmmm...worked for me. Try this, if it doesn't work, could the site be blocked?

http://www.dormgrow.com

or

https://www.amazon.com/G8LED-Optimal.../dp/B005MWHI56

Please keep us updated on your hydroponic experiment. That's something (or aquaponics) that I'm also interested in. Especially as a fish pond could act as a heat sink, and increase greenhouse humidity in our dreadfully dry winters.

I also stumbled across some info from some McGill University students (Montreal) designing a system to use the emissions from heaters for greenhouses to return carbon dioxide to the greenhouse for improved plant growth. Fun stuff!
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Old 12-25-2016, 02:11 PM   #22
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I haven't tried it for seedlings yet, rb but I'm about to. We're setting up the greenhouse now! Have the lights and some shelving. Also plan to use some extra wide guttering that was given to us. Right right now we're in the big dream think tank phase. I'll let you know.
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Old 01-02-2017, 09:53 AM   #23
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RB said
Quote:
Please keep us updated on your hydroponic experiment.
Currently constructing frame for a small system consisting
of 2 grow trays ( planter troughs actually ) + tank underneath .
Control and plumbing next .

As I see it I am very much in the learning phase and see
this as just a small first pilot run in which hopefully I make
most of the inevitable mistakes . So my expectations and
goals are set low .

Will prolly post pics soon .

..
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Old 01-04-2017, 12:55 AM   #24
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I received my seeds in the mail today. DD will be moving out by the 11th, so I'll have more room in our basement laundry/utility room by then to set up the LED light. Gives me that long to find a store selling decent soil this frozen time of the year.

It's really dry right now, between 30% and 40% RH indoors. I think I may have to buy a cheap, dollar store shower curtain liner, and hang it from the basement ceiling as a grow tent, to keep it more humid.
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