Spectrum

280 ~ 315nm The shape and the physiological processes of little effect.

315 ~ 400nm Chlorophyll absorbs less, influence light cycle effect, prevent stem elongation.

400 ~ 520nm (Blue) Chlorophyll and carotenoids absorb the largest percentage, the biggest influence on photosynthesis.

520 ~ 610nm Pigment absorption rate is not high.

610 ~ 720nm (Red) Chlorophyll absorption rate is low, for photosynthesis and light cycle effect have notable effect.

720 ~ 1000nm Absorption rate is low, stimulate cell extended, influencing flowering and seed germination In a word, the red,blue,orange is main wavelength/color energy for plants' photosynthesis.