What do you guys think of the actual efficiency of these new 660/670nm crees compared to the 630nms? With the increased photosynthesis rate would it be worth sacrificing efficiency with these?
660nm is the peak of chlorophyll A, but the main reason for including 660nm/670nm leds should be to maximize Pfr as a percent of total phytochromes.
No amount of 630nm light will get %Pfr as high as 660nm light can, sort of like no amount of yellow will make a human see blue.
%Pfr is like plant color vision. The higher it is, the higher "quality" or "color" it sees.
Ok so correct me if i'm getting this wrong but if i'm getting what your saying, the more 660nm light the plant gets the higher the efficiency of the overall absorption of light to the plant? does 730nm far red not play a part in this? assuming your talking about the emerson effect or is the 730nm only real use a flower initiator?
let me no what u pull from them also the light system looks verry messy for me cords and shit hanging every were but i hope it works out well for u let me no what u pullWhat do you guys think of the actual efficiency of these new 660/670nm crees compared to the 630nms? With the increased photosynthesis rate would it be worth sacrificing efficiency with these?
Good news, the specs are awesome!
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let me no what u pull from them also the light system looks verry messy for me cords and shit hanging every were but i hope it works out well for u let me no what u pull
I haven't seen a side by side comparison yet.So Photo Red aren't needed if 3000k is used?
and why is it so important to have a high Pfr ratio in flowering ?660nm is the peak of chlorophyll A, but the main reason for including 660nm/670nm leds should be to maximize Pfr as a percent of total phytochromes.
No amount of 630nm light will get %Pfr as high as 660nm light can, sort of like no amount of yellow will make a human see blue.
%Pfr is like plant color vision. The higher it is, the higher "quality" or "color" it sees.
I'm curious to as i just bought some 660 to play with but i have seen people use these lights and they seem to have a lot http://rollitup.org/t/testing-osram...e-v1-monochromatic-dream-or-nightmare.867782/and why is it so important to have a high Pfr ratio in flowering ?
instinctively I would tend to do the opposite with 730nm, since the stretch is over
I believe a 680nm led, while having a similar photosynthetic effeciency than a 660nm and not acting on phytochrome state, would make plenty of sense in flowering ...
by the way there's an old theory, called Photosynthetic Artificial Darkness, or Rauber enchancement, where he was mesuring the equivalent duration of different spectrum compared to a basic darkness ... he came up with a strange lighting schedule, that I wouldn't bother trying, still ...
if I understand his paper correctly, a 660nm could prevent flowering if used in high ratio ...
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and why is it so important to have a high Pfr ratio in flowering ?
instinctively I would tend to do the opposite with 730nm, since the stretch is over
I believe a 680nm led, while having a similar photosynthetic effeciency than a 660nm and not acting on phytochrome state, would make plenty of sense in flowering ...
by the way there's an old theory, called Photosynthetic Artificial Darkness, or Rauber enchancement, where he was mesuring the equivalent duration of different spectrum compared to a basic darkness ... he came up with a strange lighting schedule, that I wouldn't bother trying, still ...
if I understand his paper correctly, a 660nm could prevent flowering if used in high ratio ...
View attachment 3531207