r there any other light bulbs that wont affect photo period beside a green light?

Mr. Good

Mr. Good

Active Member
I only used a greenlight to check on my plants at night. I can assure you THAT was done ONLY after all the advice to just use green LED head lamps and BOOM...problem solved. Bullshit.

It's always just for a few minutes for me to adjust ph or to check to make sure the f'n pump is still running.

I have been a slave to these plants since the middle of July....I am their bitch through and through....they cry I come running...period.

I know what happens when SOMEONE forgets to plug the timer back in for the EZ Cloner...

IF a pump goes out on me at night...without an alarm to alert me of a pump failure...I'm screwed

I'm going to do a search on alarms or such for pump failures.
 
I

Illegal Smile

Guest
I wonder if anyone with such strong opinions on this subject has any sources?
 
DubB83

DubB83

Well-Known Member
Gypsy is correct. Any kind of lighting will emit infrared, LED or otherwise. The infrared will be enough to upset the plants... I had a pin hole leak that caused my entire crop to go hermi once and the light leaking in was a 12W CFL that was 12 feet away. No matter how miniscule, light is bad at night.

Get night vision goggles, no worries about lights on.

Dude with the light proofing problem, hang a pond liner or other thick plastic over your closet's door.

~GG420
 
B

BeatenByTheWorld

Well-Known Member
I didn't say to use green LEDs i said that was the only way to get ONLY green light.

ANY light will produce light photons which will be absorbed by the plant's photosynthesis process regardless of color, day or night, and since your sugars and bud production take place at night, you want this period to be uninterrupted. If your THAT worried about the pump maybe you should be growing in dirt lol if thats a new pump you'll have tons of hours before it even starts to lose efficiency let alone just randomly shut off for no reason. Then again anythings possible.
 
I

Illegal Smile

Guest
Mr. Good said:
Sources regarding green LED effects on plants?
Click to expand...
Sources about anything that is being stated here. Green lights are ok. No they aren't. Only LEDs are ok. No they are bad too. Who's got a reputable source for anything?
 
Mr. Good

Mr. Good

Active Member
I know that plants look green because they do not absorb ANY green fucking light.

AM I RIGHT? AM I RIGHT? AM I RIGHT?

I am right....

Plants cannot use green light to make food...period. Plants do not react to green light.

Plants appear green because they DO NOT ABSORB ANY FUCKING GREEN LIGHT from the green part of the sprectrum in the rainbow...no one knows this shit?

"Chlorophyll looks green because it absorbs red and blue light making these colors unavailable to our eyes. It is the green light which is NOT absorbed that finally

reaches our eyes making chlorophyll appear green. However, it is the energy from the red and blue light that are absorbed that is, thereby, able to be used to do

photosynthesis. The green light we can see is not/cannot be absorbed by the plant, and thus cannot be used to do photosynthesis."
http://biology.clc.uc.edu/Courses/bio104/photosyn.htm
 
I

Illegal Smile

Guest
Mr Good, I'm not even disagreeing with you. But I am frustrated about this because I have yet to see anything from any real authority on the subject saying that x amount of green light of certain characteristics will NOT affect the dark photoperiod.

And, it is true that all the light plants reflect is green but that doesn't mean all the green light is reflected. I don't know that plants don't "absorb" any green light (and I think absorb is probably too simplistic a term). Just because green light can't be used in photosynthesis doesn't mean it can't affect photoperiod. Or does it? I don't know and neither does anyone else in the thread.

My grow is in a closet that is in a bedroom. The closet's double doors don't seal all that well. I was tempted to just put in a green colored bulb in the bedroom so we can see in there to get around and not worry about a little of it leaking into the closet. Now I'm thinking about a blackout fabric curtain to cover the closet during dark, and still using green light when in the room, perhaps even just green led flashlights. I don't know, and that's what bugs me because I can't find out.
 
Mr. Good

Mr. Good

Active Member
Is two opinions from different horticultural depts from colleges not enough evidence to the contrary?

There are 2 things to consider: Absorption and reflection.

Plants look GREEN simply because they reflect that color ok?

Black absorbs virtually all the colors while white reflects most....getting it yet?

So....bongsmilieI suppose that using a green LED during lights out for short periods of time (ie a freakin headlamp) will not cause problems for you or your plants.
 
Mr. Good

Mr. Good

Active Member
Light photons that are green and yellow pass through the leaves or tissue or are reflected

again not absorbed.

:peace:
 
I

Illegal Smile

Guest
I think your conclusion may be right but not at all for the reasons you give. I'd be interested in reading the opinions of any academic on the subject. Do you have links? I doubt the specific point in question has ever been studied, but what I suspect is that green light is marginally better in terms of not affecting photoperiod (but not foolproof) and that leds are pretty safe because of their lower lumen output.
 
bigbudmike

bigbudmike

Active Member
here is what they are saying



Light and photosynthesis.

Chlorophyll does not absorb all the wavelengths of visible light equally. Chlorophyll a, the most important light-absorbing pigment in plants, does not absorb light in the green part of the spectrum. Light in this range of wavelengths is reflected. This is the reason why chlorophyll is green and also why plants (which contain a lot of chlorophyll) are also green. Note in the graph above that the absorption of light by chlorophyll a is at a maximum at two points on the graph 430 and 662 nm. The rate of photosynthesis at the different wavelengths of visible light also show two peaks which roughly correspond to the absorption peaks of chlorophyll a. Plants do not depend only on chlorophyll a in their light harvesting machinery but also have other pigments (accessory pigments) which absorb light of different wavelengths.
 
I

Illegal Smile

Guest
Does photosynthesis have anything at all to do with the subject? Those who caution against the use of even green leds (and note I am not one of them) are arguing that it does not. It doesn't matter a whit what plants do or don't do with any light spectrum in photosynthesis. Because photosynthesis isn't the only metabolic process going on in the plant. There is also sexual development. And let's remember that the whole point of 12/12 is all about sexual development (of which flowering is a part) and not about photosynthesis. The plant's photosynthesis department would much rather have 24/7 light. Sooo... it remains true that we don't have a single documented source on whether green light has the potential to affect the dark photoperiod.
 
bigbudmike

bigbudmike

Active Member
OK well if plants reflect green light while in photosynthesis or not they still reflect green light. So I think the answer is yes you can use green light because the plant reflects it rather than using it for whatever phase its in. I do not know much about the subject but it seems simple to me. Just dont leave the green light on all night. Turn it on only when needed. Your light leak cant be that bad is it?
 
I

Illegal Smile

Guest
bigbudmike said:
OK well if plants reflect green light while in photosynthesis or not they still reflect green light. So I think the answer is yes you can use green light because the plant reflects it rather than using it for whatever phase its in. I do not know much about the subject but it seems simple to me. Just dont leave the green light on all night. Turn it on only when needed. Your light leak cant be that bad is it?
Click to expand...
Those two things are probably related. By the way here is a link for a good deal on a green led flashlight. I have other ultrafire flashlights and they are great, so is deal extreme although shipping is slow. They also have rechargeable CR123A batteries and chargers. I ordered two flashlights, 4 rechargeable batteries and a charger for $40 shipped!

http://www.dealextreme.com/details.dx/sku.20331
 
Mr. Good

Mr. Good

Active Member
W R O N G ! ! !

The only time green light is absorbed is when it is yellow/green...purple/green.....any color hitching a ride with green will be able to but NOT GREEN ! What your seeing in the wavelength chart is variations of green with other colors. Those "other" colors are absorbed BUT only when accompanied by another color.....green itself is reflected or passes through...it is not used for photosynthesis and plants do not absorb it at all....even when you want me to think they do....they don't

EXAMPLE: What color is milk? Milk is white. Why? Because it reflects almost all colors that hit it.

Another EXAMPLE: Dark Matter in space is black. Why? Because it absorbs all light around it...

The green portion of the spectrum is still kicked back....why is it that hard to understand?

If the futhermocker could absorb green light then we would be raising invisible plants....are your plants invisible? If not then they only absorb every color but green.

Who here knows that the colors we see are the colors REJECTED by objects?...(reflected)?...anyone?

All sorts of plants have many variations of greens and yellows and purples...they absorb those "greenish" variations but they still aint absorbing the green...just the piggy backed colors...
 
bigbudmike

bigbudmike

Active Member
OK then my agreeing with you is a good thing. I think everyone needs to go take a toke this is getting a little to heated. Or should we have a thread about the right and wrong way to hit the bong?
 
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