What color light plants grow faster?

Green light isn't much use as they reflect the color green to us, therefore they don't absorb it (plus they have Chlorophyll). Blue light and red light, on the other hand, get absorbed by plants and help them grow. :)

Blue and red light help the plants grow

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )