~Dankster~420
Well-Known Member
Hello growers!!
I'm really glad you
decided to stop in & check this thread out!! 
*You may or may not have already learnt about this "new technique"..
But I though I would through it out there just incase!!
ENJOY!!
This technique is NOT aimed at the beginner grower!!! Its aimed at the intermediate to advanced grower who is interested in learning the cutting edge technology of growing and loves getting down and dirty with a little experimentation.
If any of you have been using SLT to alter the way your plants grow, I'd love to hear from you!
And see pics of your grows!!
What is Selective Light Training?
Selective Light Training is about hitting certain parts of a plant with light for the purpose of protein manipulation.
I have yet to run across a LED manufacturer/reseller who has a clue about light sensitive plant proteins.
A typical plant will have in excess of 1,000. The phot1 and phot2 Phototropin proteins are what's being manipulated with blue light.
Blue causes plant cells to not elongate (as much) so hitting the stem with blue gives a more compact plant.
How to Use SLT To Your Benefit?
For use on stems on your plants. You have to get the blue LED array up close to the stem with uninterrupted light.
That is why I use 20x55 degree oval LEDs. 20 degrees side to side allows a little aiming slop and the 55 degrees vertical insure light overlap.
The LEDs can be found here http://ledz.com/?p=leds.oval . Use model number 725LB7C. These are cheap Chinese LEDs so you need to under drive them to around 10 milliamps.
Putting 3 in series with a 330 ohm resistor and building an linear array allows one to use an unregulated, 12 volt power supply.
All of this is to keep costs down (those LEDs are about 3 cents each out of China in quantity). I've never seen one of these blue LEDs burn out at the lower power level.
With blue light blasting the stem only, other wavelengths of light can be used on the different parts of the plant.
In my experiments with sweet basil, I've used
The resulting leaves are 4 times larger then normal!
Not all plants react the same way, and results do seem to be strain specific (sweet basil, lettuce leaf basil and purple basil react differently!
In the pic named "mystery skunk" it is a mystery skunk marijuana plant giving to me where I can get 4-5 internodes per inch, even at lower main lighting levels.
Excess stem elongation is a thing of the past and you will get significantly more growth per area or volume.
For short day plants, use the blue LED lights for veg growth and the first two weeks of flowering only! The next picture is Purple Arrow,it had selective lighting training (it's a low yielding strain)This plant has not been topped and shows how different strains can give morphological differences.The blue light on the stem tends to produce plants that are not as wide but you have to test the strain to see how well SLT works for that strain.This allows more plants per area and more yield with intracanopy lighting.Intracanopy lighting often requires foliar nitrogen spraying and will produce a higher thermal load in your grow area as well as more humidity from the increased photosynthesis.
So I have been placing a shit ton of lights "LED" sticks along the sides of my potting containers, concentrated on the stems! And from what I've noticed it has actually has took most of the "stretch" out of strains that has long gaps between there nodes! it really has blew me away!!!
I'm really glad you
decided to stop in & check this thread out!! *You may or may not have already learnt about this "new technique"..
But I though I would through it out there just incase!!
ENJOY!! This technique is NOT aimed at the beginner grower!!! Its aimed at the intermediate to advanced grower who is interested in learning the cutting edge technology of growing and loves getting down and dirty with a little experimentation.
If any of you have been using SLT to alter the way your plants grow, I'd love to hear from you!
And see pics of your grows!!
What is Selective Light Training?
Selective Light Training is about hitting certain parts of a plant with light for the purpose of protein manipulation.
I have yet to run across a LED manufacturer/reseller who has a clue about light sensitive plant proteins.
A typical plant will have in excess of 1,000. The phot1 and phot2 Phototropin proteins are what's being manipulated with blue light.
Blue causes plant cells to not elongate (as much) so hitting the stem with blue gives a more compact plant.
How to Use SLT To Your Benefit?
For use on stems on your plants. You have to get the blue LED array up close to the stem with uninterrupted light.
That is why I use 20x55 degree oval LEDs. 20 degrees side to side allows a little aiming slop and the 55 degrees vertical insure light overlap.
The LEDs can be found here http://ledz.com/?p=leds.oval . Use model number 725LB7C. These are cheap Chinese LEDs so you need to under drive them to around 10 milliamps.
Putting 3 in series with a 330 ohm resistor and building an linear array allows one to use an unregulated, 12 volt power supply.
All of this is to keep costs down (those LEDs are about 3 cents each out of China in quantity). I've never seen one of these blue LEDs burn out at the lower power level.
With blue light blasting the stem only, other wavelengths of light can be used on the different parts of the plant.
In my experiments with sweet basil, I've used
blue
on the stem and amber on the leaves.The resulting leaves are 4 times larger then normal!
Not all plants react the same way, and results do seem to be strain specific (sweet basil, lettuce leaf basil and purple basil react differently!
In the pic named "mystery skunk" it is a mystery skunk marijuana plant giving to me where I can get 4-5 internodes per inch, even at lower main lighting levels.
Excess stem elongation is a thing of the past and you will get significantly more growth per area or volume.
For short day plants, use the blue LED lights for veg growth and the first two weeks of flowering only! The next picture is Purple Arrow,it had selective lighting training (it's a low yielding strain)This plant has not been topped and shows how different strains can give morphological differences.The blue light on the stem tends to produce plants that are not as wide but you have to test the strain to see how well SLT works for that strain.This allows more plants per area and more yield with intracanopy lighting.Intracanopy lighting often requires foliar nitrogen spraying and will produce a higher thermal load in your grow area as well as more humidity from the increased photosynthesis.
So I have been placing a shit ton of lights "LED" sticks along the sides of my potting containers, concentrated on the stems! And from what I've noticed it has actually has took most of the "stretch" out of strains that has long gaps between there nodes!
it really has blew me away!!!
