So after a review of Dr. Bugbee’s research on lettuce can we assume that increased proportion of ‘yellow’ light (λ580–600 nm) can be responsible for decreased yield in cannabis.
Why should we believe this may be true?
It is possible that an increased proportion of yellow light in the spectrum could have an impact on cannabis yield because yellow light is not as effective at supporting photosynthesis as blue and red light.
Photosynthesis is the process by which plants use light energy to convert carbon dioxide and water into glucose and oxygen.
Different wavelengths of light are absorbed by different pigments in the plant, with blue and red light being absorbed by chlorophyll, the primary pigment responsible for photosynthesis.
Yellow light is absorbed less efficiently by chlorophyll compared to blue and red light, so it is not as effective at supporting photosynthesis.