Re: [APD] PAR sucks because plants are green

["Daniel Larsson" <defdac at hotmail_com>]

Jerry Bake wrote:
"Plants can use green as well, just not as efficiently. Having blue light
or red light only can cause plants to do unwanted things (getting long
and spindly under red light for instance)."

Yes with accessoric pigments, but very inefficiently:
http://www.cartage.org.lb/en/themes/Sciences/BotanicalSciences/PlantHormones/Nutrition/706.GIF

The dip in the yellow-grreen is where it hurts.

The spread in horizontal growth is often phenomenal with
High-kelvin bulbs: The plant think it sees the sky and
spreads out.

The spread is not about the blue in the High-kelvin though, but
variations in the far-red part of the spectrum:
http://www.cc.jyu.fi/~aphalo/old_pages/pdf/notes1.pdf


Best regards
Daniel Larsson
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