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Offlinejohnson1
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Ideal PPFD
    #24225843 - 04/07/17 04:16 PM (7 years, 9 months ago)

Hello everyone, I'd like to get a discussion going from anyone's personal experiences when it comes to amount of light they are using. We all know about the "ambient" light guideline during colonization and "direct" light during fruiting, but does anyone have any real knowledge of amount of light? If anyone is familiar with cannabis grows, there's something called PAR or PPFD that is used to determine the amount of light desired during vegetative and flowering cycles. Does anyone have any knowledge of what is most appropriate for mushrooms? I can't seem to find it anywhere, and curiosity is getting the best of me. I know we can produce great results with all sorts of lighting setups, but would be interested to hear of anyone knows of concrete numbers.

Side note - how sure are we that 6500k is the most fruitful spectrum?

Thanks all, looking forward to hearing from you

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Offlinemushpunx
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Re: Ideal PPFD [Re: johnson1]
    #24226024 - 04/07/17 05:43 PM (7 years, 9 months ago)



Well mushrooms certainly do like light. Here is an example from 2 weeks ago-

I stack my tubs in the corners of my rooms, I stand up long florescent shoplight with 2 , 6500K bulbs and lean it against the corner of the wall so it doesn't tip.
This means the bottom tubs are closer to the light than the top.
The tub in this photo, although hard to tell from the angle it was photographed, was on top and no more than a foot away from the light.

Every single fruit was reaching for the light, leaning at a strong angle almost 45°
The lower tubs were all standing vertical, and the second to the top tub was leaning at a slightly less dramatic angle towards the light.


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Offlinejohnson1
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Re: Ideal PPFD [Re: mushpunx]
    #24260759 - 04/20/17 10:57 PM (7 years, 8 months ago)

Bump

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Invisiblec10h12n2o
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Re: Ideal PPFD [Re: johnson1]
    #24260924 - 04/21/17 12:34 AM (7 years, 8 months ago)

its gonna be totally different for fungi

remember, fungi are decomposes, they do not contain chlorophyll and thus do not undergo photosynthesis

they will definitely reach and respond to light, and it can make a big difference, but since this response to light is not a primary function of its growth (as with plants) there wont be an ideal ratio akin to cannabis's (or any plant's) light requirements


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InvisibleMad Season
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Re: Ideal PPFD [Re: c10h12n2o]
    #24261322 - 04/21/17 08:24 AM (7 years, 8 months ago)

Yep. Mushrooms have many tropisms, and light is just one of them. They take energy from the light, and obviously grow quite nicely from it. It's been shown blue light in the 6500K range is the most effective,  and too much sunlight/light can be more harmful than beneficial. Plants love intense lighting, but mushrooms don't need it as much.


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Offlinemushpunx
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Re: Ideal PPFD [Re: Mad Season]
    #24261341 - 04/21/17 08:45 AM (7 years, 8 months ago)

Quote:

Mad Season said:
Yep. Mushrooms have many tropisms, and light is just one of them. They take energy from the light, and obviously grow quite nicely from it. It's been shown blue light in the 6500K range is the most effective,  and too much sunlight/light can be more harmful than beneficial. Plants love intense lighting, but mushrooms don't need it as much.




You ever tried the blue lighting?
I just use a shoplight with 2, 6500K bulbs


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InvisibleMad Season
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Re: Ideal PPFD [Re: mushpunx]
    #24261344 - 04/21/17 08:48 AM (7 years, 8 months ago)

6500K is blue light, or rather bluish-white. Not talking about LED blue light lol


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Re: Ideal PPFD [Re: Mad Season]
    #24261392 - 04/21/17 09:16 AM (7 years, 8 months ago)

Quote:

Mad Season said:
6500K is blue light, or rather bluish-white. Not talking about LED blue light lol




Ha! Learn something new every day :facepalm:


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Invisiblec10h12n2o
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Re: Ideal PPFD [Re: Mad Season]
    #24261868 - 04/21/17 01:40 PM (7 years, 8 months ago)

Quote:

Mad Season said:
Yep. Mushrooms have many tropisms, and light is just one of them. They take energy from the light, and obviously grow quite nicely from it. It's been shown blue light in the 6500K range is the most effective,  and too much sunlight/light can be more harmful than beneficial. Plants love intense lighting, but mushrooms don't need it as much.




Big thanks for sharing great info :highfive1:

Of course they exhibit the tropism associated with light and it seems to help with pinsets probably for that reason, but are you able to shed any light on the mechanism involved (in both the phototropic response and any energy production from light)? I'm fascinated

Also, when you say that take energy from light, can you explain how this works biologically and by what metabolic pathway they convert light into energy?

I've heard it mentioned before, but I'm totally ignorant of how it would work on a cellular level

It's obviously not chloraphyll, and in nature most of the mycelial mass lives in/under its food and the ground, and thus mostly out of the sun. Seems like only the fruits get any direct exposure to light and it makes sense that they don't like direct sunlight because of how quickly it could dry out the fruits, potentially before maturation

I always enjoy picking your brain:)


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Re: Ideal PPFD [Re: c10h12n2o]
    #24261982 - 04/21/17 02:34 PM (7 years, 8 months ago)

Mushrooms have so many different types of phototropic responses it isn't even funny, and its still such a young science, there's bound to be many more. Most species don't have a phototropic response quite like cubes tho, so it's very hard to say anything definitive. Here's but one example of a mechanism of phototropism:

http://pubs.rsc.org/en/content/articlelanding/2007/pp/b702155k

Here's an epic article on a huge range of different mechanisms compared between plants and fungi of many different types. And it's probably safe to assume cubes have more

http://onlinelibrary.wiley.com/doi/10.1002/wmts.36/pdf

Overall it's still very young, but with cubes a lack of light results in spindly stems and small ass caps. Too much light/too intense and pinsets get harmed. This has just been my experience, and it's obvious proper light aids in their development.


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No trees were killed in the sending of this message. However, a large number of electrons were terribly inconvenienced.

Edited by Mad Season (04/21/17 02:40 PM)

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