The range of light wavelengths that plants use for photosynthesis. Specifically, PAR includes light in the 400 to 700 nanometer range, which encompasses visible light that plants can absorb to produce energy. In cannabis cultivation, PAR measurement is essential for optimizing light conditions in both indoor and outdoor growing environments, ensuring that plants receive the right amount and quality of light for healthy growth.
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In the Wild — Example
Only light within the Photosynthetically Active Radiation range contributes to plant growth. Watts alone don't tell the whole story.
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