Green light in grow room?
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BigSkyBudTHC
Active Member
how can there be so much debate about the green light? the fact is you can use a green light, or any bulb covered in green saran wrap at night in your grow room with no negative effects. been doing it when needed for a wile now. and i'm not the only person.
DawgMountain
Active Member
I was thinking about this awhile ago but in terms of the Photo Darkroom. There is a "reddish" light that doesn't seem to expose light on to the photo paper (or at least very little). So it makes sense to me that a low intensity green light over short periods would have negligible effect.
so the long and short of it is, if i have just a normal bulb painted green it will work yes?
all this talk about wattage higher or lower sort of stands to reason no point taking the chance lower the better as long as you can still see but what if it you have two bulbs painted (say factory done) and one seem to have a thicker coat,darker shade on it but is darker would that not be better than the lighter one? i just feel that there should be just a green light of it and nothing else. ps i a with all the people that say if you do ot need to go in there then don't. peace out
all this talk about wattage higher or lower sort of stands to reason no point taking the chance lower the better as long as you can still see but what if it you have two bulbs painted (say factory done) and one seem to have a thicker coat,darker shade on it but is darker would that not be better than the lighter one? i just feel that there should be just a green light of it and nothing else. ps i a with all the people that say if you do ot need to go in there then don't. peace out
AlteredEgo
Active Member
Yes, because the green in the case of coated glass is not reflective, it is a filter. it filters out all other colors, that is why we see it as green. the plants look green, because they reflect green, but use other color spectrum for life processes.
it has been field proven for years, that most any green lighting will not effect the plants during sleep, and i have read lab reports that say a plant cannot see green at all.
it has been field proven for years, that most any green lighting will not effect the plants during sleep, and i have read lab reports that say a plant cannot see green at all.
Keefers26
Active Member
This is insane. PLANTS STILL USE LIGHT FROM THE GREEN PART OF THE SPECTRUM! Please please just read a tiny little bit about photosynthesis and how light works and not just repeat things you've heard.
Any light is still photon energy interacting with the plant. I'm not here to say anything about positive or negative effects, and neither should anybody who says they have seen no negative effects from a green light, but how can they be SO sure. I'm just saying that there is clearly no way there are zero effects from using a green light. Simply put if the idea is NO light, then your green light is interfering with that idea. The idea of a specific green is even more insane...are your plants the exact same shade of green all over?
This is photosynthesis:
Carbon dioxide + electron donor + light energy → carbohydrate + oxidized electron donor
Plants absorb light primarily using the pigment chlorophyll, which is the reason that most plants have a green color. Besides chlorophyll, plants also use pigments such as carotenes and xanthophylls.
I would obviously try my best to not let any light at all upon my plants during the dark period of the flowering stage, and I certainly would not feel safe or comfortable with any 'green' light shining about.
Any light is still photon energy interacting with the plant. I'm not here to say anything about positive or negative effects, and neither should anybody who says they have seen no negative effects from a green light, but how can they be SO sure. I'm just saying that there is clearly no way there are zero effects from using a green light. Simply put if the idea is NO light, then your green light is interfering with that idea. The idea of a specific green is even more insane...are your plants the exact same shade of green all over?
This is photosynthesis:
Carbon dioxide + electron donor + light energy → carbohydrate + oxidized electron donor
Plants absorb light primarily using the pigment chlorophyll, which is the reason that most plants have a green color. Besides chlorophyll, plants also use pigments such as carotenes and xanthophylls.
I would obviously try my best to not let any light at all upon my plants during the dark period of the flowering stage, and I certainly would not feel safe or comfortable with any 'green' light shining about.
lol
newbie9
Active Member
Your equation is ignorant. The plant reflects green light meaning the green light is not absorbed. If it were absorbed that would mean it could grow under a green light. As an experiment we took 3 plants. We grew one under a 100watt 2600k one under a 100watt GREEN and left one in the dark. They were all grown for 3 weeks under the sun and then put in seperate lightproof cabinets. The only one that survived 2weeks was the one with the 100watt 2600k and did beautifully well. The other two died and looked exactly the same. The green light did nothing. The plant does not use this frequencey of light nor does any plant for photosynthesis. Does the sun ever shine green? The atmosphere filters the light depending on angle, clouds, and gasses and varys from seasons. In the spring/summer the light is more towards the 5600k and the fall/winter is more towards the 26/2700k. Any green CFL is the best approach..Or even a Mag-Lite with a true green lense. I made one from green plexi glass.. But no the plant does not use any green light to survive. and thats just the FACTs proven by controlled experiments in a very controlled enviroment. Try growing any plant under a green light and it just will not live.
put that in your pipe and smoke it.
sixstring2112
Well-Known Member
i been using a couple green t5's in my room for years,it gets used at least 4 times a week.no problems here
blackandgreyrainbow
Member
The plant can sense the green light but since so little is absorbed it only effects the plant a little, like growing out doors and having the moon and stars out.
bigboybuds
Well-Known Member
I have a set of Green LED Christmas lights hung around the top of my room. Never had a problem.
southsacboy916
Well-Known Member
Been using a green cfl from home depot n haven't seen any negative affects... I've left them on durin the whole dark period on multiple occasions n haven't ran into any problems wit that...
TooRare2Die
Active Member
Please don't use any green bulb guys those are no good for your rooms.
The green lights need to be true green light. Meaning it needs to be l.e.d light. They sell them at most of your local grow shops.. a party bulb isn't true green light.. its a painted bulb or colored in a green film the light will still be yellow if u peel it back.
Happy growing!!
The green lights need to be true green light. Meaning it needs to be l.e.d light. They sell them at most of your local grow shops.. a party bulb isn't true green light.. its a painted bulb or colored in a green film the light will still be yellow if u peel it back.
Happy growing!!
memeandsammy
New Member
Question when they say to use a green light when going into your room when lights off can you use a green cfl Thank You Kind Kin
memeandsammy
New Member
Wow thanks for the input
fearnoevil
Well-Known Member
I realize this is an old thread, but I found it using the Google, which means any newb can too and so BECAUSE it is extremely IMPORTANT that good information is passed on and bad information is stomped out wherever it's found, let's set the record straight ONCE AND FOR ALL!!!
First off, Keefers26 is an idiot (sorry can't be kind to people who talk out their ass as if they KNOW something is factual, when to the contrary ALL the evidence and existing science state otherwise). He and others who constantly say they "believe X is true", but based on nothing more than their own uninformed opinions (and without even bothering to use the Google to fact check their beliefs) are usually the source of SOOO much misinformation, it's sad AND misleading to those who don't know any better. Alright, now down to the nitty gritty,
QUESTION: CAN YOU USE A GREEN LIGHT IN YOUR GROW ROOM AT NIGHT?
ANSWER: YES. PERIOD, END OF REPORT!
Now I could go into all the science, but this is KNOWN information that any experienced horticulturist or botanist can tell you, and it's already been shared in this post by Prot3us1 here: https://www.rollitup.org/t/green-light-in-grow-room.11892/page-2#post-3892425
But the jist is this: CANNABIS PLANTS DO NOT USE LIGHT IN THE GREEN WAVELENGTH/SPECTRUM. NONE. NADA. ZILCH. This means that it is 100% okay to use a green light in your grow room during the dark periods without fear of doing any harm. And to refute TooRare2Die's statement, NO IT DOES NOT MATTER if you use green LED, or green CFL or a green painted incandescent bulb, AS LONG AS THE LIGHT EMITTED IS GREEN THAT IS WHAT IS IMPORTANT. That the light behind the dye or paint is white DOES NOT MATTER, only what color is projected. However that said, the danger with a painted bulb is that some are not painted well and may be too thinly painted (especially near the socket end) and any scratch is going to create a leak of white light that may be too insignificant for you to see, but the plants will, so LED's definitely have that advantage.
And to reiterate, a cannabis plant APPEARS green to the human eye EXACTLY because it is reflecting light in the green spectrum while absorbing all the others in the visible spectrum of light. This reflection indicates that the plants are NOT using this wavelength so in essence green light is INVISIBLE to cannabis plants. This also explains why we see colors. For instance blue dye isn't actually blue - a particular blue dye simply reflects all the blue light (whatever shade it is) that is within the full spectrum of the lighting available, which is why under HPS lighting, with it's limited red-shifted spectrum, your blue shirt doesn't look so blue ;?D
And let's dispel a few more myths while we're at it. CANNABIS PLANTS ARE NOT HUMANS, so we should try not to anthropomorphize them by saying things like "sleeping" or "waking" or "disturbing" them. While it may be convenient to use these terms, it can lead to some incorrect thinking as to how plants actually grow and function.
It is perfectly okay to work on your plants during the dark period as well, and sometimes absolutely necessary or preferred. This includes applying foliar treatments, trimming leaves, killing pests, what have you, and if, like myself, you have ever had to work a swing shift, there may be days or weeks when it's the only time you can get anything done. So don't worry, be happy, and use green lights whenever you need to to work on your girls (lol, alright a little bit of humanizing our green friends is fine, including giving them plenty of TLC ;?).
First off, Keefers26 is an idiot (sorry can't be kind to people who talk out their ass as if they KNOW something is factual, when to the contrary ALL the evidence and existing science state otherwise). He and others who constantly say they "believe X is true", but based on nothing more than their own uninformed opinions (and without even bothering to use the Google to fact check their beliefs) are usually the source of SOOO much misinformation, it's sad AND misleading to those who don't know any better. Alright, now down to the nitty gritty,
QUESTION: CAN YOU USE A GREEN LIGHT IN YOUR GROW ROOM AT NIGHT?
ANSWER: YES. PERIOD, END OF REPORT!
Now I could go into all the science, but this is KNOWN information that any experienced horticulturist or botanist can tell you, and it's already been shared in this post by Prot3us1 here: https://www.rollitup.org/t/green-light-in-grow-room.11892/page-2#post-3892425
But the jist is this: CANNABIS PLANTS DO NOT USE LIGHT IN THE GREEN WAVELENGTH/SPECTRUM. NONE. NADA. ZILCH. This means that it is 100% okay to use a green light in your grow room during the dark periods without fear of doing any harm. And to refute TooRare2Die's statement, NO IT DOES NOT MATTER if you use green LED, or green CFL or a green painted incandescent bulb, AS LONG AS THE LIGHT EMITTED IS GREEN THAT IS WHAT IS IMPORTANT. That the light behind the dye or paint is white DOES NOT MATTER, only what color is projected. However that said, the danger with a painted bulb is that some are not painted well and may be too thinly painted (especially near the socket end) and any scratch is going to create a leak of white light that may be too insignificant for you to see, but the plants will, so LED's definitely have that advantage.
And to reiterate, a cannabis plant APPEARS green to the human eye EXACTLY because it is reflecting light in the green spectrum while absorbing all the others in the visible spectrum of light. This reflection indicates that the plants are NOT using this wavelength so in essence green light is INVISIBLE to cannabis plants. This also explains why we see colors. For instance blue dye isn't actually blue - a particular blue dye simply reflects all the blue light (whatever shade it is) that is within the full spectrum of the lighting available, which is why under HPS lighting, with it's limited red-shifted spectrum, your blue shirt doesn't look so blue ;?D
And let's dispel a few more myths while we're at it. CANNABIS PLANTS ARE NOT HUMANS, so we should try not to anthropomorphize them by saying things like "sleeping" or "waking" or "disturbing" them. While it may be convenient to use these terms, it can lead to some incorrect thinking as to how plants actually grow and function.
It is perfectly okay to work on your plants during the dark period as well, and sometimes absolutely necessary or preferred. This includes applying foliar treatments, trimming leaves, killing pests, what have you, and if, like myself, you have ever had to work a swing shift, there may be days or weeks when it's the only time you can get anything done. So don't worry, be happy, and use green lights whenever you need to to work on your girls (lol, alright a little bit of humanizing our green friends is fine, including giving them plenty of TLC ;?).
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hyroot
Well-Known Member
plants do absorb green light. Green light helps pigments absorb more wave lengths of light in other regions. Keefer 26 was actually correct. Check my earlier post in this thread. I'll post the link to a study from Oxford University again. Next time read the whole thread.
I bet you get a few seeds from each plant and say its due to stress. Its the . stress caused by using green light during their sleep cycle.
http://pcp.oxfordjournals.org/content/50/4/684.long
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