Pure blue supplemental lighting/heating during dark period. Greenhouse

karmaxul

karmaxul

Well-Known Member
Okay so Im building a small little atrium and Ive been tossing around ideas about supplemental lighting and heating. Mostly heating is for the night to early morning and most plants get their light during the day though this could be more efficient. I was reading Ed Rosenthal's notes on giving plants a pure blue light during the dark periods to help with chloroplast / sugar production, growth, etc. He also mentioned that a possible orange could be given as well neither of which would effect the flowering. Okay so those who have not yet researched it, lights like HID's for instance produce 25% light with the electric used and 75% heat. LEDs and inductions may be more efficient depending on who you ask regarding the LEDs though still thats a good amount of heat, just what I need. Basically Im paying for heat and using 100% energy efficient lights depending on how you look at it. The next question is do they exist or how to best build them? The next question is what wavelengths can they use, what are the best ratios and why.

https://www.rollitup.org/t/4-season-greenhouse-take-1.889661/

Thanks in advance.
 
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churchhaze

Well-Known Member
Also, "depending on who you talk to..." You need to stop listening to what people tell you and start running through their math yourself.

Btw, your experiment isn't going to work! It's been tried many times before with conclusive results suggesting the hypothesis is probably incorrect.
 
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PurpleBuz

Well-Known Member
karmaxul said:
Okay so Im building a small little atrium and Ive been tossing around ideas about supplemental lighting and heating. Mostly heating is for the night to early morning and most plants get their light during the day though this could be more efficient. I was reading Ed Rosenthal's notes on giving plants a pure blue light during the dark periods to help with chloroplast / sugar production, growth, etc. He also mentioned that a possible orange could be given as well neither of which would effect the flowering. Okay so those who have not yet researched it, lights like HID's for instance produce 25% light with the electric used and 75% heat. LEDs and inductions may be more efficient depending on who you ask regarding the LEDs though still thats a good amount of heat, just what I need. Basically Im paying for heat and using 100% energy efficient lights depending on how you look at it. The next question is do they exist or how to best build them? The next question is what wavelengths can they use, what are the best ratios and why.

https://www.rollitup.org/t/4-season-greenhouse-take-1.889661/

Thanks in advance.
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blue light during dark period will not work, neither will orange or green, its been tried and failed.
 
karmaxul

karmaxul

Well-Known Member
churchhaze said:
There is no such thing as a 100% efficient lamp.
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The inefficiency from lights is seen in heat. Since I need heat too it is not wasted hence not inefficient. What is not inefficient is efficient hence "depending on perspective". ;)

Im curious how Ed Rosenthal got it to work? I looked I don't have his email anymore.
 
karmaxul

karmaxul

Well-Known Member
They say Thomas Edison tried 100 times before he got a working light bulb. From his tests he discovered 100 ways how not to make a light bulb though that did not mean it was not possible. I would love to review or learn more of the tests. If not blue then what about orange. What level of blue. I am reading a thread on another site about it now that is really intensive.

https://www.icmag.com/ic/showthread.php?t=251557&page=4
 

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THE KONASSURE

Well-Known Member
certain bands of light given 15mins to 1 hour after and before your on/off can speed up and increase flowering

I think its far band red and ir maybe some uv`s and oranges maybe too

as for heat and ir you can give them during lights out, your best bet is probably some of them red silica tube lights or maybe try some of them other IR heaters a few people on here run them in the winter with no issues

I`ve tried using IR led lights to see if that speeds up flower tbh I did not notice any difference but I just used one small cluster many grows have cams with IR lights on them so we know that IR leds are fine if you shop you could probably find some wide band IR leds that had some far red in them that may not effect flowering but may allow the plants to do something more during lights out

Good luck let us know if you make any super dank discoveries
 
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churchhaze

Well-Known Member
karmaxul said:
The inefficiency from lights is seen in heat. Since I need heat too it is not wasted hence not inefficient. What is not inefficient is efficient hence "depending on perspective". ;).
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I get what you're trying to say now, but it still doesn't make sense to me. If you want an inefficient lamp for generating heat, why look into LED in the first place?

Why not just use HPS? (or even incandescent for that matter)
 
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PurpleBuz

Well-Known Member
karmaxul said:
The inefficiency from lights is seen in heat. Since I need heat too it is not wasted hence not inefficient. What is not inefficient is efficient hence "depending on perspective". ;)
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many more efficient ways to generate heat than lights.

karmaxul said:
Im curious how Ed Rosenthal got it to work? I looked I don't have his email anymore.
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as far as I know he was "hypothesizing" and never got it to work. At that time he wrote about that it was theory, being difficult to economically produce narrow wavelength bands of light.
 
karmaxul

karmaxul

Well-Known Member
churchhaze said:
I get what you're trying to say now, but it still doesn't make sense to me. If you want an inefficient lamp for generating heat, why look into LED in the first place?

Why not just use HPS? (or even incandescent for that matter)
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Im actually looking into induction 500watt fixtures which are a red spectrum. I would rather get heat other ways as it is cheaper though all Im saying is it will not be wasted.

PurpleBuz said:
many more efficient ways to generate heat than lights.



as far as I know he was "hypothesizing" and never got it to work. At that time he wrote about that it was theory, being difficult to economically produce narrow wavelength bands of light.
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I see. Thanks. I wonder if there is a threshold for each wave length in terms of lumens that the plant could take during the dark periods. Would take a bit of work to map though may have interesting results
 
alesh

alesh

Well-Known Member
karmaxul said:
I see. Thanks. I wonder if there is a threshold for each wave length in terms of lumens that the plant could take during the dark periods. Would take a bit of work to map though may have interesting results
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In terms of lumens, green is your best bet.
 
FranJan

FranJan

Well-Known Member
There is a certain level of energy of light that works with blue light at lights off but I've never been bothered with it all and the amount of heat given off would probably be so low as to just be dissipated through the environment easily enough without really effecting the temp enough. Here's something I never really got my teeth into. It may help the OP. I have some more but can't find it :(.

Phototropins Promote Plant Growth in Response to Blue Light in Low Light Environments
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1087990/
 
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