Plants can utilize light in both the orange and red end of the spectrum, as well as in the blue end of the spectrum of light. Blue is more useful for vegetative plant growth, while red is more useful for reproductive and root growth. Green and yellow light is usually reflected and is of little use to a plant.
About this Author
Brian Albert has been in the publishing industry since 1999. He is an expert in horticulture, with a focus on aquatics and tropical plants like orchids. He has successfully run an aquatic plant business for the last five years. Albert's writing experience includes the Greater Portland Aquarium Society newsletter and politics coverage for a variety of online journals.