Plants use infrared, red, and blue light to regulate their growth and flowering as well as to power photosynthesis. Photosynthesis is the process by which plants use light to combine water absorbed by the roots and carbon dioxide from the air to make sugar. Sugar fuels the cell’s life processes and is a building block for tissue.
Green light is not used by plants and is reflected back from the leaves. For this reason green light can be used in a dark room. It will not affect the plants’ flowering cycles. Green incandescent bulbs and green fluorescents are available. The incandescent bulbs filter out most light but green. Green fluorescent lamps produce a bright green light.
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