Light affects plant growth in three ways, including quality, quantity and duration. All of these must come together in the proper balance to ensure optimal growth of a plant.
Quality addresses the wavelength or color of the light that hits the surface of the plant. Sunlight may be a prism of different colors, including red, yellow, blue, violet, orange, green and indigo. Weather events such as rain can work similar to a prism and cast different colors. Quantity means the concentration or intensity of the sunlight the plant is receiving, and duration refers to how long the plant is getting sunlight.