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Why so many pigments? So we can get a big range of light.Plants prefer specific lights. Chlorophyll a= .... nm, Chlorophyll B: 460 nm, carotenoids = ..... nm. A sudden 2nd peak at the end too as well.Visible spectrum - light we can seeLeaves are green bc they ..... green light.To grow best plants get blue light or .... red lightPhoton - unit of light

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