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Originally Posted by veggii
1. are the absorption spectrum's for plant's the same
per chlorophyll a & b and cartenoids or does each plant differ some?
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They might differ very little (like tenths of a nanometer). But im pretty sure that the chlorophyll and carotenoids are almost identical (grown and handled in the same conditions) since the plants
Quote:
Originally Posted by veggii
2. which graph is correct?
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Opie's, i think is the graph you are looking for. do you mean the absorption spectrum for cannabis?
Quote:
Originally Posted by veggii
so i would say that some more experiment's are needed
i would recommend first testing the cannabis graph
and getting leds as close as possible to the peaks on that chart
425nm,440nm,469nm,483nm,640,nm,660nm
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I agree. those would be the perfect wavelengths. we have 470nm (pretty much 469) commercially available and financially sound but 660nm still has ALOT of room to improve. like i said in my big post, pretty much the only 660nm LED that I could find that wasnt over $80 was the LedEngin. But the output was too small to be efficient for the price ($11). 640nm looks to be in the future as we can get 635 and 645. I hope 440nm comes to the market as well as 425nm because that would make the blue spectrum perfect on the absorption. 483nm would also be nice for the carotenoids. I agree with your posts about the carotenoids and such, i posted something like that near the beginning of the thread.