Answer:
Blue and Red
Explanation:
Blue Light
The blue wavelengths are from 430 to 450 nm. This part of the spectrum is also known as cool light. These wavelengths encourage vegetative growth through strong root growth and intense photosynthesis.
Red Light
The longer wavelengths of light are red in color. The red spectrum are from 640 to 680 nm. These wavelengths encourage stem growth, flowering and fruit production, and chlorophyll production.
Both are very important in winter time (Alaska's case)
