Blue light is primarily responsible for vegetative leaf growth. Red light, when combined with blue light, encourages flowering.
Found that on this site Colorado State University Master Gardener - Plant Growth Factors: Light

So I wonder if having alot more blue light during the vegetative phase would make even healthier and bigger plants as SnS' (not dissing your plants look amazing-just dreamin here:smokin and then in the flowering stage we will provide red light....