Do Green Lights Work

[Tim Johns]

Okay... I wanted to address a couple things.

First, there are reasons for going in during the dark cycle. I'm currently [unfortunately] using a tent right now. I had a tiny issue with just a few spider mites. And I wanted to be 100% sure they were eradicated. My plants were barely into flower so they had a lot of time before harvest. So I bought Doktor Doom's organic fogger. According to instructions (and common sense), you're not supposed to set them off during the light cycle or while ventilating. With a tent (or some situations without), you are required to go in and unzip the tent completely, but not until the dark cycle. For that reason, I needed a way to be able to see in the dark [so to speak].

Anyway, I ended up creating the green screen app I was talking about months ago at the beginning of this thread (https://play.google.com/store/apps/details?id=co.tjohns.tim.greenhydroponiclight). I've since harvested with no issues (and no mites). I wanted to create this for myself, which I did, but then released it in the Play Store (free & no permissions/ads). It's been doing great with over 100 downloads already and a few 5 star reviews.

Another thing I wanted to share was an article I read by Rosenthal about experimenting with different spectrums. I will warn you... his old books contained several instances of misinformation. But, nevertheless, the article's pretty good... http://mjgrowers.com/book_what_exper1.htm. I haven't read experiment #2 yet.

 

[MedicalMike420]

Yes they work, no need for any long explanation.
The colors you see is light being reflected back at you.
You see plants as green because they reflect green light.
Just make sure it's a green light, and that you don't let light in when you are entering/leaving the room. I would only open the door if it's dark on both sides

 

[Olive Drab Green]

The plant won't register green light because it is green. It'll be pretty much invisible.

 

[Tim Johns]

Yes they work, no need for any long explanation.
The colors you see is light being reflected back at you.
You see plants as green because they reflect green light.
Just make sure it's a green light, and that you don't let light in when you are entering/leaving the room. I would only open the door if it's dark on both sides

As far as making sure it's 100% green, I guess that would depend on the phone's hardware & software. When I coded the app, I set the background color to 0% red, 0% blue, and 100% green. So, I'm assuming the phone will abide by that. I guess it's possible that no matter what color, if the phone's LEDs aren't strong enough, it could be adding white to compensate when turning the brightness the whole way up. But hopefully not.

 

[Resinhound]

The plant won't register green light because it is green. It'll be pretty much invisible.

Yes they work, no need for any long explanation.
The colors you see is light being reflected back at you.
You see plants as green because they reflect green light.
Just make sure it's a green light, and that you don't let light in when you are entering/leaving the room. I would only open the door if it's dark on both sides

This is total misinformation and old news,green light IS seen by plants,hence the white light craze we are currently enjoying.Its just not absorbed as well as the other colors of the spectrum.

 

[saiyaneye]

I was actually wondering about this the other day

 

[Olive Drab Green]

This is total misinformation and old news,green light IS seen by plants,hence the white light craze we are currently enjoying.Its just not absorbed as well as the other colors of the spectrum.

Maybe I'm wrong. I'm just going off of what I was taught.

 

[Tim Johns]

Yea... according to what I've read, they do see it... but it doesn't make the plant produce the chemical reaction to determine flowering period like other spectrums. Supposedly the same is true for blue, but I feel more comfortable with green - and only when a situation demands entering during the dark cycle.

 

[nomofatum]

Green is about 80% as visible as red or blue to the plant. So you can get away with 20% more light before the plant will react and potentially herm. Green is used in photosynthesis. So, avoid working in the dark period, but if you have to, use a very dim light and let your eyes adjust. It doesn't take much light to see, it takes much more for a plant to "wake up", so use low power unfocused light, like a single small candle.

 

[Tim Johns]

Green is about 80% as visible as red or blue to the plant. So you can get away with 20% more light before the plant will react and potentially herm. Green is used in photosynthesis. So, avoid working in the dark period, but if you have to, use a very dim light and let your eyes adjust. It doesn't take much light to see, it takes much more for a plant to "wake up", so use low power unfocused light, like a single small candle.

I have to completely disagree with that. I've read a lot of different theories and supposed facts, but your explanation of it being 80% visible by the plant seems to be 80% opposite of what I've been reading. Maybe I'm reading it wrong. I might agree if you said 80% of blue. But I don't agree with the 'red' part... sorry.

 

[Olive Drab Green]

Green is about 80% as visible as red or blue to the plant. So you can get away with 20% more light before the plant will react and potentially herm. Green is used in photosynthesis. So, avoid working in the dark period, but if you have to, use a very dim light and let your eyes adjust. It doesn't take much light to see, it takes much more for a plant to "wake up", so use low power unfocused light, like a single small candle.

..Don't do this in a tent or small closet, or around explosive materials or plant matter. Please.

 

[nomofatum]

I have to completely disagree with that. I've read a lot of different theories and supposed facts, but your explanation of it being 80% visible by the plant seems to be 80% opposite of what I've been reading. Maybe I'm reading it wrong. I might agree if you said 80% of blue. But I don't agree with the 'red' part... sorry.

It's amazing how many people are stuck on the old 70's-80's false botany data based on only two pigments within plants. The absorption graph is much more flat than you would believe with all the false info out there. Take a look at the charts and info here:
https://www.icmag.com/ic/showthread.php?t=293045

 

[nomofatum]

..Don't do this in a tent or small closet, or around explosive materials or plant matter. Please.

Plant matter? You have a bunch of dry plant matter in your grow tent? The wet live stuff wouldn't go up in flames if you tried your very best. Seems like a pointless thing to say, if you are afraid of a tiny flame, maybe you shouldn't be growing stuff for the purpose of smoking, lol. Don't bring your joint with you into Olive Drab's room, apparently his grow room is rigged to explode.

 

[Olive Drab Green]

Plant matter? You have a bunch of dry plant matter in your grow tent? The wet live stuff wouldn't go up in flames if you tried your very best. Seems like a pointless thing to say, if you are afraid of a tiny flame, maybe you shouldn't be growing stuff for the purpose of smoking, lol. Don't bring your joint with you into Olive Drab's room, apparently his grow room is rigged to explode.

If a light can burn a plant easily, what do you think a fire source is going to do to it?

 

[Olive Drab Green]

Also, I use a pesticide made with sulfur and pyrethins, so personally, my crop would go up like a Christmas tree in a Texas brushfire on the Fourth of July.

 

[lee1000]

I have a bulb hanging from the ceiling. It's an led with plastic green bulb mould. It's on 24 hours a day, usually just because I'm a stoner and I forget to switch it off a lot of the time. Has been on pretty much all the time for the last 3 grows. Plants never hermied, flowering cycles seemed normal and finished with great yields. I use it because I want to go in there whenever I want. There is a door between my grow room and the entrance though so it's always pitch black in that part.

Through my experience I would say try it and don't hang too much onto posts of what other members have only read about.