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LBH
Banned
Join Date: May 2009
Posts: 5,950
No reflective material
I have my Church seedlings in the kitchen under 2 x 200w cfl's. They are just out in the open. Seeing as how there is no mylar or anything, do you think it will make much difference? They say once light is reflected or refracted, it loses a ton of it's punch. I don't want runts so someone straighten me out if I'm wrong
 
  #2  
09-04-2009, 02:14 PM
Registered User
Join Date: May 2009
Posts: 2,298
Blog Entries: 1
Re: No reflective material
i think that it loses a ton of punch after it gets reflected, i use cfl lights and i use mylar and it seems to reflect the light a little but not much
i think mylar is more for hps or mh
your topping tutorial was brilliant by the way
 
  #3  
09-04-2009, 08:06 PM
 
LBH
Banned
Join Date: May 2009
Posts: 5,950
Re: No reflective material
Quote:
Originally Posted by edwardvanhalen
i think that it loses a ton of punch after it gets reflected, i use cfl lights and i use mylar and it seems to reflect the light a little but not much
i think mylar is more for hps or mh
your topping tutorial was brilliant by the way
No dude,...the tutorial is 'helpful",.....proposing to that fiance of yours,...THAT'S brilliant!! lol
 
  #4  
09-04-2009, 08:52 PM
 
BKKG
Puts the Can in Cannabis
Join Date: Jul 2007
Location: In the lab
Posts: 802
Re: No reflective material
Quote:
Originally Posted by LBH
I have my Church seedlings in the kitchen under 2 x 200w cfl's. They are just out in the open. Seeing as how there is no mylar or anything, do you think it will make much difference? They say once light is reflected or refracted, it loses a ton of it's punch. I don't want runts so someone straighten me out if I'm wrong
Reflective material does make a difference, but with CFL's the light output degrades pretty quickly and so you won't see the effects as much. I'd say that adding reflective material is worthwhile in general, but it's always hard to say how much it would help. You could do an experiment, with one plant surrounded by reflective material and one with out, and note the differences.
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I'm not a stoner, and I'm not a hippie, but my life is absolutely better with marijuana in it than it was without.

To Growers: The absolute, #1 best thing you can possibly do for your plants is research before you start. Ignoring this is like depriving your plants of light or water-- enough to ruin everything because a vital component is missing.
 
  #5  
09-04-2009, 10:30 PM
keep it green
Join Date: Mar 2006
Posts: 13,108
Re: No reflective material
The issue with reflected light is two-fold:

First is the total distance the light has to travel, knowing that light energy dissipates at a rate that is the square of the distance. So, if the light travels 6 inches to get to the reflective material and then 6 inches back to the plant, it has traveled 12 inches total. Since CFLs have low light intensity in the first place you should have your plants very close to the light, within 1-2 inches. If that is the case then the reflected light that travels 12 total inches is only 1/144th of the light reaching the plant from the bulb one inch away. Not much to worry about.

Second issue is the reflective quality of the material itself. Nothing reflects 100% of light, so all reflective materials reduce the amount of light being reflected (and that is dissipating over the distance traveled). So in the above example you would end up with even less than 1/144th of the light.

So you should use something with high reflectivity and really only worry about it if you are keeping the distance the light travels to a minimum.

The other side of that coin is very simply this: light that does not reach the plant directly can either be reflected back or lost, and reflecting any amount of light back is only going to be helpful to the plant, even if only in a tiny way. But maybe not worth a big investment when using CFLs.

A flat bright white surface actually is pretty reflective and cheap too, so I suggest you put up some panels with white surface, as close as possible to the plants. Don't spend a lot of money for capturing that "lost" light but don't expect it to do much either.