streetlights?

Gquebed

Gquebed

Well-Known Member
So i have a couple plants going in the back yard. They seem to be stretching now... and looks like getting ready to bud. But... it just ocurred to me... the plants seem to be getting a lot of light cast down on them from the back alley street lights... is this going to fuck them up?
 
Hopefully not. How far away are they? I cant imagine anything higher than say 250-400 hid bulb in there. While its bright to our eye i doubt that lights hitting the plant strong enough to effect light schedule....but im human. Could be wrong.
 
Not far away... maybe 15 feet out across the alley and 30 feet up.

One is in a pot so i can move it. The other is in the ground so....

And ... oops... shoulda looked harder at the others threads and i woulda saw that one in the link...
 
A squared + B squared = C squared

So assuming your measurements are in the ballpark, you are about 33.5 feet away from the light. I remember when I was using lights to overwinter chilis, I read the strength of the light was cut in half for every foot. So the light is halved 33 times before it reaches your plants. You should be fine. But I would still move the one in a pot. Never hurts to play it safe.
 
Larry {the} Gardener said:
A squared + B squared = C squared

So assuming your measurements are in the ballpark, you are about 33.5 feet away from the light. I remember when I was using lights to overwinter chilis, I read the strength of the light was cut in half for every foot. So the light is halved 33 times before it reaches your plants. You should be fine. But I would still move the one in a pot. Never hurts to play it safe.
Click to expand...

Well it will be interesting to see how they compare with the light difference since they are the same strain. Good opportunity to learn somethi g here...
 
It
Larry {the} Gardener said:
A squared + B squared = C squared

So assuming your measurements are in the ballpark, you are about 33.5 feet away from the light. I remember when I was using lights to overwinter chilis, I read the strength of the light was cut in half for every foot. So the light is halved 33 times before it reaches your plants. You should be fine. But I would still move the one in a pot. Never hurts to play it safe.
Click to expand...

Its not really that the light is halved for every foot, it's more of a relative relationship between the light and the object regardless of unit of measure.

For example, a light shining on an object 8 feet away is 4 times as strong as a light with identical output that is 16 feet away. Correspondently, a light shining on an on an object 8mm away is 4 times as bright as a light 16mm away.

Please someone correct me if I'm wrong as I went off of memory there. Pretty sure that's correct though.
 
Bruvyman said:
It


Its not really that the light is halved for every foot, it's more of a relative relationship between the light and the object regardless of unit of measure.

For example, a light shining on an object 8 feet away is 4 times as strong as a light with identical output that is 16 feet away. Correspondently, a light shining on an on an object 8mm away is 4 times as bright as a light 16mm away.

Please someone correct me if I'm wrong as I went off of memory there. Pretty sure that's correct though.
Click to expand...
I remember my old science teacher using melted butter in a spray bottle and toast to teach this lesson. You can cover one piece of toast from a certain distance. Double the distance and you can cover 4 pieces of toast. But each one will only have 1/4 as much butter. Crazy how that stuck with me since 1978. I guess she was a good teacher.
 
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