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Offlinetoikey
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Registered: 11/01/03
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Loc: Perth, Australia
Last seen: 11 years, 5 months
light emitting diodes
    #2379324 - 02/26/04 01:29 PM (12 years, 9 months ago)

I was just wondering if anyone uses LEDs to light small terrariums instead of fluro/incandescant desklamps.. an led is one of those little lights they put in ur computer's box to show u whether its on, harddrive in use etc etc

using semiconductor technology they run cooler, more efficiently and can provide significant light from small power sources

The green/blue LED i was considering has a dominant wavelength output of 505nm and a spectral half width of 30nm (most light output in the range 475-535nm) and a circuit with a handful of these diodes pulsing at a desired rate would operate off a small battery for a very long time

I am a bit concerned that the light they put out will not be close enough to the light needed for fruiting and a wide spectrum incandescant/fluro will be a much safer bet, not to mention significantly lower light intensity from the blinking diodes.

does anyone know if such an arrangement is suitable for fruiting cubies?


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Invisibledobinky
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Registered: 01/30/03
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Re: light emitting diodes [Re: toikey]
    #2379654 - 02/26/04 02:41 PM (12 years, 9 months ago)

you could isolate 1 cake with an led in a little poor mans pod and let us know how it works out.


--------------------
Today?s Pig is Tomorrow?s Bacon


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Offlinej_db69
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Re: light emitting diodes [Re: toikey]
    #2379849 - 02/26/04 03:44 PM (12 years, 9 months ago)

It should work out just fine concerning the spectrum but not sure how many lumens they actually need.  You could actually use LEDs to grow plants (like MJ plants :smile: if you had enough of them.  They are very efficient but it would be very tedious setting up a board and putting all of them in.


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Offlinetoikey
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Registered: 11/01/03
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Loc: Perth, Australia
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Re: light emitting diodes [Re: j_db69]
    #2386686 - 02/28/04 03:45 PM (12 years, 9 months ago)

mm fair enuf.. but now a bit more info...
'normal' leds have an approximate light output of 3-5 mcd (dunno what this is but think of the blinky on ur car alarm)
the led i have is a super high intensity 3500 mcd specimen....
i was under the impression that shroomies dont need lumens and it was just the presence of photons at certain wavelengths that encourage pinning?


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Offlinesc4recr0w
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Re: light emitting diodes [Re: toikey]
    #2387120 - 02/28/04 07:26 PM (12 years, 9 months ago)

I would think that the super bright led should be just fine for growing P.cubensis, since the fungi only uses light for direction. so only a tiny amount of light is necessary.


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OfflineGregHimself
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Re: light emitting diodes [Re: sc4recr0w]
    #2387711 - 02/29/04 12:17 AM (12 years, 9 months ago)

I have known people to use white LEDs with no problems for lighting terrariums during pinning stage. they wokred well, and as you said, are very good for say a more secretive growing system.


--------------------
"The key to successful cultivation is to match the skills of the cultivator with the right strain on the proper substrate under ideal environmental conditions."
Paul Stamets
Growing Gourmet and Medicinal Mushrooms(Third Edition)


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Offlineteen
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Registered: 02/13/04
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Re: light emitting diodes [Re: GregHimself]
    #2387754 - 02/29/04 12:37 AM (12 years, 9 months ago)

Any evidence to suggest one particular color LED works better than others?


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OfflineGregHimself
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Re: light emitting diodes [Re: teen]
    #2387770 - 02/29/04 12:45 AM (12 years, 9 months ago)

Dunno, all I know is they used white.


--------------------
"The key to successful cultivation is to match the skills of the cultivator with the right strain on the proper substrate under ideal environmental conditions."
Paul Stamets
Growing Gourmet and Medicinal Mushrooms(Third Edition)


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Offlinebotaanik
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Re: light emitting diodes [Re: GregHimself]
    #2388087 - 02/29/04 03:59 AM (12 years, 9 months ago)

If one would construct pors man terrariums and want to use LED(white) then how much led should one put in top of the terrariums? And should they be on 24h or just couple of houres or so?


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Offlineteen
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Re: light emitting diodes [Re: botaanik]
    #2388121 - 02/29/04 04:28 AM (12 years, 9 months ago)

Quote:

then how much led should one put in top of the terrariums?




Are you trying to stop superman from seeing your shrooms?



(I couldn't resist, sorry)


--------------------
Don't give me that load of bunk~!


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Offlinebotaanik
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Re: light emitting diodes [Re: teen]
    #2388146 - 02/29/04 04:43 AM (12 years, 9 months ago)

some way I think I'm!


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InvisibleTRS
The SneakyMastermind
Registered: 10/13/03
Posts: 374
Re: light emitting diodes [Re: botaanik]
    #2388256 - 02/29/04 06:20 AM (12 years, 9 months ago)

i read that blue leds are better, just my two cents


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OfflineGregHimself
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Re: light emitting diodes [Re: TRS]
    #2388384 - 02/29/04 09:16 AM (12 years, 9 months ago)

i would say one or two would do the trick fine, and a 12 hour cycle of light wouldnt hurt anything.


--------------------
"The key to successful cultivation is to match the skills of the cultivator with the right strain on the proper substrate under ideal environmental conditions."
Paul Stamets
Growing Gourmet and Medicinal Mushrooms(Third Edition)


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Offlinexwave3000
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Registered: 02/27/03
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Re: light emitting diodes [Re: toikey]
    #2388581 - 02/29/04 11:56 AM (12 years, 9 months ago)

My friend has used blue LEDs, usually two per bin, one on each end. It worked out just fine. Though it might be cheaper to just buy x-mas lights, though it won't be as stealthy with a wire gonig in to a bin.


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Offlinetoikey
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Registered: 11/01/03
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Loc: Perth, Australia
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Re: light emitting diodes [Re: xwave3000]
    #2397959 - 03/03/04 12:44 PM (12 years, 9 months ago)

just built a flashing circuit so my super bright "signal green" is sorta pulsing on/offfffff quite quick... at about 2Hz
if i can find some blue ones il mod the circuit for em!!
a couple cakes already pinning (first time so mega yay) and i wanna see if this hurries the others... they are only a few days since birth so i am VERY happy with current progress
and yes as alluded to this is somewhat a stealth arrangement:


two large airstones in geolite and water with perlite on top...
humidity 94% rh temps 24-26 degrees C
NOTE i dont have a digi cam (yet) so this pic is from just before installation of new super green brightness :smile:
il try show before light and after light cake pix ... cakes were recieving irregular ambient light before this
thanks shroomery!!!


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Offlinetralfamadorian
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Registered: 03/09/04
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Re: light emitting diodes [Re: toikey]
    #2413137 - 03/10/04 01:26 AM (12 years, 8 months ago)

Does anyone know anything further on this topic? This seems to be the extent of knowledge on LEDs for fruiting, and any further information would be good.


--------------------
"So maybe the whole thing does happen inside one's skull. Maybe it is private and there's no unitive knowledge of anything but one's own physiology. Who cares? The fact remains that the experience can open one's eyes and make one blessed and transform one's whole life."


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OfflineIfIWereARichMan
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Registered: 10/27/03
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Re: light emitting diodes [Re: tralfamadorian]
    #2415168 - 03/10/04 03:06 PM (12 years, 8 months ago)

Sure, Ill bite.

LEDs are just as useful as any other source of light when it comes to fruiting. Namely, they provide a direction for the shrooms to grow. This whole obsession of you people with LEDs is a little bit absurd, if you ask me. Indirect sunlight is fine. An LED is fine. A flouro is fine. An HPS grow light is fine.

All this chasing after the most perfect light source is just barking up the wrong tree - you want to worry about something that will affect your grow instead of which light delivery system is ideal.

direct quote from stamets:
This is from TMC "A thorough investigation on the photosensitivity of P. cubensis can be found in a master's thesis by E.R. Badham (1979). His work reinforces the conclusions of the other researchers working with the Basidiomycetes: more pinheads are initiated upon exposure to blue and ultra-violet light with distinct peaks at 370, 440 and 460 nanometers. In contrast, red, infra-red and green light having wavelengths greater than 510 nanometers were ineffective."
"Primordia Formation for P. Cubensis:
Light: Diffuse natural or exposure fro 12-16 hours/day of grow-lux type fluorescent light high in blue spectra at the 480 nanometer wavelength"
"The best type of light tube is one which most closely resembles natural outdoor light."
So I'd say cool-white fluorescent is the best bet.


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InvisibleFish0
Bum
Registered: 07/26/03
Posts: 37
Loc: England
Re: light emitting diodes [Re: toikey]
    #2415810 - 03/10/04 05:25 PM (12 years, 8 months ago)

have a look at this if you are looking for leds for growing with
http://www.sunbeamtech.com/new/products/led/led%20series-laser%20led.htm


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OfflineGr0wer
always improving
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Registered: 09/16/03
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Re: light emitting diodes [Re: toikey]
    #2415838 - 03/10/04 05:30 PM (12 years, 8 months ago)

This test has been done. blue ~470nm works best.


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