Have u ever thought why does big commerical ops put HIDs more then 3m above the plants ? What does a 3m high 1k hid ppfd look like ? Probably very lame, but still you get stellar plants and final product... How is that so ?
Even certhule would agree that light don't disappear, it's absorbed and travels until it do
So the distance is more a factor of how much light will hit your plants totally, but the plants still knows there are many high intensity sources above them, like you, you look outside and everything is nice and light is all around, your eyes are fine, but when u look up you know that the light source which create this "weak" eye level light is much more stronger then what u see here, same happens with plants, they see weak ppfd maps with HIDs but they know these weak numbers are coming from a very powerful source and react to it even though the entirety of that source don't hit em from 1 inch away.
Edit - LEDs suggest another reality, a reality of the same intensity source no matter height or other sources, this is very different from nature.
Even certhule would agree that light don't disappear, it's absorbed and travels until it do
So the distance is more a factor of how much light will hit your plants totally, but the plants still knows there are many high intensity sources above them, like you, you look outside and everything is nice and light is all around, your eyes are fine, but when u look up you know that the light source which create this "weak" eye level light is much more stronger then what u see here, same happens with plants, they see weak ppfd maps with HIDs but they know these weak numbers are coming from a very powerful source and react to it even though the entirety of that source don't hit em from 1 inch away.
Edit - LEDs suggest another reality, a reality of the same intensity source no matter height or other sources, this is very different from nature.
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