Mau5Capades: builds & grow journal

BobCajun

BobCajun

Well-Known Member
JorgeGonzales said:
Here is some stuff from @alesh, who is much better at this than I am. Instead of subtracting you could add red or blue to hit whatever ratio you wanted.

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Yeah I could add red and blue but the whole idea is to find a cheaper and easier way. A filter cost under $10 and all you do is position it under the light with some air space. Cheap and easy. I'll just use the 1/8 minus green one with 88% transmission. I can take a 12% hit. It may not improve anything but it's just something I'm curious to try.
 
Airwalker16

Airwalker16

Well-Known Member
BobCajun said:
Yeah I could add red and blue but the whole idea is to find a cheaper and easier way. A filter cost under $10 and all you do is position it under the light with some air space. Cheap and easy. I'll just use the 1/8 minus green one with 88% transmission. I can take a 12% hit. It may not improve anything but it's just something I'm curious to try.
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I'm curious to see your results and what it even looks like! When you gonna have it?
 
SoOLED

SoOLED

Well-Known Member
this road ends with the "blurple" solution on paper, which we know doesn't work when applied like its printed.

with out getting to technical things I don't understand: think of a line of ants. some ants are red, green, blue, orange, etc. some ants are stronger then others. if you kill the weaker ones, what happens?

also reflected light is changed light, you have to consider wave lengths after they have been partially absorbed and reflected.

filtering light is like photon abortion, you never give it a chance to shine.

” ‘Tis better to have shined and lost, Than never to never shined at all”
 
SoOLED

SoOLED

Well-Known Member
Airwalker16 said:
I've found natural sunlight causes TONS of stretch.
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IME: any pin-point light source causes stretch, and diffused lighting or lots of lights sources over a larger area make shorter, more bush like.

the sun, though the plants seem to know when to stop and bush on their own, where indoors left alone with a single light to far away, you get a whip no matter what.
 
The Green Griffin

The Green Griffin

Well-Known Member
coreywebster said:
I'm sure your all very familiar with this chart but in case anyone's not
View attachment 3681311
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Hey CW! This chart ignores the signals sent to the plant by other wavelengths. Good example is the IR trigger response for flowering. Not all beneficial light is driving photosynthesis. Also, FYI the "average sun" number is irrelevant. The total spectrum is what is important. Equal levels of 250 nm and 750 nm would average 500 nm but I'm sure it would not grow plants well. Or at all. And no, I'm not willing to test that theory!:bigjoint::peace::weed:
 
BobCajun

BobCajun

Well-Known Member
Airwalker16 said:
I've found natural sunlight causes TONS of stretch.
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That's due to the high far red levels, I would assume. To reduce stretching from FR you have to use EOD red, 5 min. I actually use both EOD and EON red, 5 min before main lights come on and 5 minutes after they go off, in addition to on the whole time WITH the main lights. The reds are just on a separate timer set for 12 hours and 10 minutes.

If nothing else, the EON red may at least wake the plants up less shockingly with a low level of light than just starting right off with full blast. I don't know of any study that shows gradual increase in intensity is better than sudden full intensity, I guess nobody thought of doing a study on it, but maybe it is better. Anyway, EON red has other benefits so why not?
 
BobCajun

BobCajun

Well-Known Member
SoOLED said:
this road ends with the "blurple" solution on paper, which we know doesn't work when applied like its printed.
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Not quite the same as blurple, because it is still a continuous spectrum, just reduced in the green region. It's not zero green, it's just 50% LESS green (for a 1/2 minus green filter).

Green LEDs are actually less efficient than making green from blue with phosphors, that's how bad it is. So the obvious answer is to filter out some of the excess green. Then you have something which is superior to mixed singles and to plain white COBs. You have a "tuned" white spectrum with the efficiency of white COBs, minus whatever percentage is absorbed by the filter. So let's say your COBs are set up for 40% efficiency. So you lose say 30% from the filter. You still have 28% efficiency. Now what's the efficiency of a RGB LED system? Unlikely it's 28%.

I hate to keep discussing this subject in GM5's thread, unless he wants to discuss it, so let's just move on. I'll let you know in this thread how it turns out later.
 
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SoOLED

SoOLED

Well-Known Member
you guys took care of that chart I see. good I was going to talk to corey in his natbv
Greengenes707 said:
What do all your guys grows look like. Do you have a thread to follow, or just here in mou5's? You all sound so experienced and confident in what you say. How do your real results stack up?

Cause the sun definitely sucks...
]
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such a morning person, just like the sun: a ray of light to brighten everyone's day!

my outdoor plants love the sun too
 
BobCajun

BobCajun

Well-Known Member
I did just find an interesting article about green light effects on elongating seedling stems. Don't know if it would apply to more mature plants. Apparently other single color bands don't have that effect. Whether the effect is good or bad would depend on your viewpoint I guess, what you're trying to achieve. Just something to add to the general knowledge of light spectra.
 
BobCajun

BobCajun

Well-Known Member
You know that article I linked earlier about green light? Well after reading it some more it occurred to me that if green promotes growth for an hour or so after a pulse of it then it might be good to use EON green light for 5 minutes. The growth promotion may apply to a whole plant, not just the stem. Nobody ever tried EOD green, much less EON. I do have a couple green 13w CFLs so I guess I should try it, see what happens.
 
Growmau5

Growmau5

Well-Known Member
BobCajun said:
You know that article I linked earlier about green light? Well after reading it some more it occurred to me that if green promotes growth for an hour or so after a pulse of it then it might be good to use EON green light for 5 minutes. The growth promotion may apply to a whole plant, not just the stem. Nobody ever tried EOD green, much less EON. I do have a couple green 13w CFLs so I guess I should try it, see what happens.
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hey man, you seem like a nice guy and I enjoy your posts. I just don't want my thread filled up with all this green light talk. I would enjoy reading about it and reading your perspectives and experiments, but I would be more interested in doing that in the appropriate thread.

I am all down for some good ole fashioned lighting science talk. But this isnt a catch all thread. we have those, like these:

https://www.rollitup.org/t/cob-talk.906852/
https://www.rollitup.org/t/lets-talk-about-other-cobs.908494/
https://www.rollitup.org/t/why-do-some-guys-wats-to-still-use-mono-led-with-cobs.889223/page-28#post-12568209

@Airwalker16 @SoOLED @coreywebster that goes for you guys too. I like you guys, I like your comments and the discussion & I want to have it with you. But I would like to do it in the right place.

cheers.
 
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