Grow lights with higher amounts of red are often using in the flowering stage to encourage plants to grow tall (stretch) and to help promote budding. Plants may switch to the flowering stage faster under red light than under blue.
I use high pressure sodium lights for flower. They have that reddish hue like the sun at all times. The more you mimic the suns colors and cycles the better results you have. This takes some pretty cool growing equipment and the knowledge to implement it.
What your in reference is the high reds from sunrise and sunset. Like how the sky stretches those pigments out. This is how the plant knows to go to sleep and wake. The function is to promote better sleep cycles which aid flower production.