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InvisibleCaptain Cubensis
Bleeding HeartLiberal


Registered: 09/18/07
Posts: 648
The Benefits of Blue Light
    #7828306 - 01/03/08 04:46 PM (16 years, 2 months ago)

Could the mycs love of 6500+ blue light be exploited by using blue colored trays/bins?

Would those cheap blue light bulbs provide any benefit or is that a stupid question?

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OfflineDigitalNomad
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Registered: 08/03/07
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Re: The Benefits of Blue Light [Re: Captain Cubensis]
    #7828314 - 01/03/08 04:48 PM (16 years, 2 months ago)

I would imagine that the cheap blue bulbs just have the glass tinted, and are just simply incandescent bulbs at heart, so you're not changing the kelvin of the actual light, just preventing any other colour light from reaching the shrooms?

I could be wrong though, it's been a while since I've done this stuff.


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Here's to the first step...

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InvisibleCaptain Cubensis
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Registered: 09/18/07
Posts: 648
Re: The Benefits of Blue Light [Re: DigitalNomad]
    #7828334 - 01/03/08 04:54 PM (16 years, 2 months ago)

No I think no are right, it has to be 6500 Kelvin color temp, painting a floro blue would not change that.

But what about using blue trays though?

Blue walls?

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Offlinesomebody041
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Re: The Benefits of Blue Light [Re: Captain Cubensis]
    #7830397 - 01/04/08 12:16 AM (16 years, 2 months ago)

color doesn't really work like that. its determined by the wavelength of the energy 6500k is ideal. i don't think painting the walls blue or using blue trays is going to make that much of a difference, especially since it wouldn't be light.

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OfflineBigDD
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Registered: 10/05/07
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Re: The Benefits of Blue Light [Re: somebody041]
    #7830579 - 01/04/08 01:33 AM (16 years, 2 months ago)

The best paint for any walls would be FLAT white. Flat white reflects more light energy than semi or gloss white or any other color of paint, and more than aluminum foil. Blue paint would absorb all wavelengths of light, other than that perticular wavelength of blue, which it would reflect. The spectrum of even the blue wavelengths in light is wider than just one shade of blue. You would be losing various wavelengths of the blue part of the light spectrum using a perticular blue paint. Stick with FLAT white.

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Invisiblefastfred
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Re: The Benefits of Blue Light [Re: BigDD]
    #7830663 - 01/04/08 03:32 AM (16 years, 2 months ago)

Almost any light will saturate the myc's ability to respond to it. 6500K lights often have a lower lumen output than standard "cool white" lights, so they really aren't any more suited for growing as their output in the blue spectrum is no higher due to their lower total output. It's the output in the useful spectrum that's important and almost any light will hit the maximum that myc will respond to so the main consideration with lighting is heat output.

Experiments have been done and even a single flash from a strobe light will induce pinning, so clearly that is not an area worth optimizing.


-FF

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OfflineRogerRabbitM
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Re: The Benefits of Blue Light [Re: fastfred]
    #7830731 - 01/04/08 04:49 AM (16 years, 2 months ago)

Quote:

Experiments have been done and even a single flash from a strobe light will induce pinning, so clearly that is not an area worth optimizing.





Recent experiments(over the last 23 years) have shown the error of that statement in TMC. Many experiments have shown conclusively that fluorescent lamps in the 6500K range produce better pinsets and healthier, meatier fruits than other forms of light. Stamets himself does not repeat that 'flash of light' triggers pinning nonsense. In fact, he recommends fluorescent lamps in the 6,500 Kelvin range for 12/12 just as I do. In addition, there's a huge difference in saying something can result in 'pins', and helping to trigger a very nice flush.

Light, and the intensity/frequency of light is extremely important if one is interested in greater than mediocre performance. Many species, such as agaricus and P cubensis, can pin in the total absence of light. That doesn't mean light isn't required for best results, especially with light sensitive species such as P cubensis and P ostreatus.
RR


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semper in excretia sumus solim profundum variat

"I've never had a failed experiment.  I've only discovered 10,000 methods which do not work."
Thomas Edison

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Invisiblefastfred
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Re: The Benefits of Blue Light [Re: RogerRabbit]
    #7830777 - 01/04/08 05:26 AM (16 years, 2 months ago)

True. Mushrooms will fruit even in the complete absence of light. However I've never heard of anyone running into problems with light/pinning unless it's heat related.

You once mentioned increased results with HID lights, with the assumption that the light penetrated farther into the myc. I find that to be reasonable but rather impractical, for heat/cost reasons.

I was recently looking at a number of different fluorescent tubes and found that higher K lights mostly had lower lumen outputs. Looking at the spectral graphs of different types I noticed that while there is a modest increase in the blue spectrum with high K lights their lower lumen output would end up resulting in less light in the spectrum of interest.

So from a lumen-per-watt, and an intensity in the spectrum of interest perspective the cool white lights seem to be a better option.

What is your take on that analysis?


-FF

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InvisibleSillicybin
Registered: 02/14/05
Posts: 2,134
Loc: Flag
Re: The Benefits of Blue Light [Re: fastfred]
    #7830895 - 01/04/08 07:16 AM (16 years, 2 months ago)

Heh - HIDs for mushroom growing?

That's all we need, is amateur mushroom hobbyists trying to wire the hot side of a ballast.....

EDIT: (not that it's that hard, but people grenade their gloveboxes all the time with Lysol as it is...)

Suppose it's not much more of a fire risk than all the guys that run 1500+ watt heaters, lights and humidifiers on timers all on the same circuit...

Edited by Sillicybin (01/04/08 07:37 AM)

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InvisibleCaptain Cubensis
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Registered: 09/18/07
Posts: 648
Re: The Benefits of Blue Light [Re: Sillicybin]
    #7831763 - 01/04/08 12:20 PM (16 years, 2 months ago)

So one might benefit from painting the inside of a casing tray flat white, just above casing layer?

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