Is the moon considered a light leak?

Wizzlebiz

Wizzlebiz

Well-Known Member
doug mirabelli said:
At what point would you expect to see problems from a distant street light?
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In my yard for instance I have 2 street lamps on either side of the yard. Yellow light. They are maybe 50 feet away from the yard in both directions.

That has caused me issues in the past. I dont know the exact distance for it though. I'm sorry.

My rule of thumb on this is fairly simple.

If the light shinning in from false light is brighter than the natural night light I am worried.
 
DarkWeb

DarkWeb

Well-Known Member
Wizzlebiz said:
In my yard for instance I have 2 street lamps on either side of the yard. Yellow light. They are maybe 50 feet away from the yard in both directions.

That has caused me issues in the past. I dont know the exact distance for it though. I'm sorry.

My rule of thumb on this is fairly simple.

If the light shinning in from false light is brighter than the natural night light I am worried.
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If they're 50 feet away.... how much stretch do you get?
 
rkymtnman

rkymtnman

Well-Known Member
Wizzlebiz said:
In my yard for instance I have 2 street lamps on either side of the yard. Yellow light. They are maybe 50 feet away from the yard in both directions.

That has caused me issues in the past. I dont know the exact distance for it though. I'm sorry.

My rule of thumb on this is fairly simple.

If the light shinning in from false light is brighter than the natural night light I am worried.
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i bought a cheap-o lux meter off ebay a few years ago just to get an idea of my ppfd for some new QBs. i'd love to see what lux reading you get at your plant.
 
Wizzlebiz

Wizzlebiz

Well-Known Member
rkymtnman said:
i bought a cheap-o lux meter off ebay a few years ago just to get an idea of my ppfd for some new QBs. i'd love to see what lux reading you get at your plant.
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There are apps. Im sure they aren't totally accurate but il try the spot where I kept them in the past (I move everything into my shed at night now) and let you know tonight.
 
rkymtnman

rkymtnman

Well-Known Member
Wizzlebiz said:
There are apps. Im sure they aren't totally accurate but il try the spot where I kept them in the past (I move everything into my shed at night now) and let you know tonight.
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i've seen a decent chart but this is what i found on wiki.
A full moon on a clear night is tremendously bright (high lumen value), however the lux received on the Earth is about 1/4 of a lumen per square meter. In comparison, a light bulb will have an illumination of approximately 50 lux, while direct sunlight can get up to 130,000 lux at the Earth's surface
 
Wizzlebiz

Wizzlebiz

Well-Known Member
rkymtnman said:
i've seen a decent chart but this is what i found on wiki.
A full moon on a clear night is tremendously bright (high lumen value), however the lux received on the Earth is about 1/4 of a lumen per square meter. In comparison, a light bulb will have an illumination of approximately 50 lux, while direct sunlight can get up to 130,000 lux at the Earth's surface
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Thats a bit of different light wouldnt you say?

Its a reflection of the sun. It is missing a decent amount of UV spectrum.

My point is there are different factors then just how bright it is.
 
davethepothead

davethepothead

Well-Known Member
Thundercat said:
Very simple. The genetic trigger for plants to autoflower does not transfer too 100 % of offspring, atleast not without years of proper breeding to stabilize the genetics.

Just like if you cross a purple budded plant with a green budded plant. Only a certain percentage of plants will be purple or green, and another percentage will have characteristics of both.

It’s very common for auto seeds to produce individual plants from a batch which won’t auto.
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Very well worded @Thundercat To answer @dravenvlad about the best way to know if you have autoflower seeds is to BUY QUALITY AUTOFLOWER SEEDS. Quality breeders and genetics play a big role so do your due diligence before giving people your money.
 
Wizzlebiz

Wizzlebiz

Well-Known Member
rkymtnman said:
this is true. if your streetlights are HPS, they don't have any UV either.
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I just read up on HPS. Thing is I don't grow inside so you do have more info on that than me for sure.

Interestingly enough the moon delivers the same light spectrums as the sun however it is incredibly weaker of course.

I need to read more again about yard lighting to figure out the why behind it. What I assumed to be the cause of peoples light pollution effects might be different than what I thought.

We still know its an issue. Hence why most won't interupt theyre dark cycle for fear of nanners and such.

Or why people can leave a photo plant under out door lights to veg a bit longer when the outdoor light cycle has fallen short.

I'm gonna read alot more about it. Thank you
 
S

Scottritchie_89

Member
Light pollution is widely exaggerated. Ive grown quite a few strains outdoors with my patio light around the corner. Theres not alot but paired with the moon do provide a fair amount of light and ive never had a problem. As long as the light polution isn't more than the moon itself i wouldnt worry
 
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Scottritchie_89

Member
Wizzlebiz said:
I just read up on HPS. Thing is I don't grow inside so you do have more info on that than me for sure.

Interestingly enough the moon delivers the same light spectrums as the sun however it is incredibly weaker of course.

I need to read more again about yard lighting to figure out the why behind it. What I assumed to be the cause of peoples light pollution effects might be different than what I thought.

We still know its an issue. Hence why most won't interupt theyre dark cycle for fear of nanners and such.

Or why people can leave a photo plant under out door lights to veg a bit longer when the outdoor light cycle has fallen short.

I'm gonna read alot more about it. Thank you
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Just wanted to point out that the moon is reflecting the suns light so yes itll have the same spectrum minus a bit of filtration
 
Thundercat

Thundercat

Well-Known Member
Spectrum really shouldn’t have much to do with this. You can grow plants under all sorts of different light spectrums. Sure some work slightly better then others but we aren’t talking about those type of details.

I believe the question is at what light intensity photosynthesis begins at. Which I don’t know off hand and would require some research on my part to answer.
 
Wizzlebiz

Wizzlebiz

Well-Known Member
Thundercat said:
Spectrum really shouldn’t have much to do with this. You can grow plants under all sorts of different light spectrums. Sure some work slightly better then others but we aren’t talking about those type of details.

I believe the question is at what light intensity photosynthesis begins at. Which I don’t know off hand and would require some research on my part to answer.
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Thank you. That is in fact the only question that needs to be answered here.
Scottritchie_89 said:
W

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Cosmic dust and debris. Also energy is lost on the surface of the moon once its reflected. Also it has to go through our atmosphere
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Thank you. I'm just attempting to understand why moon light doesn't stress a plant but a window light can.
 
rkymtnman

rkymtnman

Well-Known Member
Wizzlebiz said:
Thank you. That is in fact the only question that needs to be answered here.
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not exactly an easy thing to answer.

this is all i found so far:
However, it is possible to suggest approximate limits within which photosynthesis will take place; a minimum intensity of about 500-1000 lux enables the plant's photosynthesis rate to keep pace with respiration, and thus maintain itself.
 
S

Scottritchie_89

Member
Wizzlebiz said:
Thank you. That is in fact the only question that needs to be answered here.

Thank you. I'm just attempting to understand why moon light doesn't stress a plant but a window light can.
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Plants have evolved under moonlight. Theres got to be more to it other than spectrum but i think ambient light is fine just not direct on the leaves
 
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