The Planted Tank Forum - View Single Post - Blue leds for vegetative growth?
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Old 01-07-2013, 03:12 AM   #12
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Best wavelengths for photosynthesis:

Chlorophyll A: 435 - 665 nm
Chlorophyll B: 490 - 650 nm

I'm interested to hear as well.

As an experiment, Ive ordered a KZ Fiji Purple for its red spectrum. Its the only bulb I can find which would satisfy a plants chlorophyll A spectral needs in red @ at 650nm. The blue end of the spectrum seems to me much easier to find and satisfy.

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