PAR is the acronym for Photosynthetically Active Radiation. It specifically refers to the wavelengths of visible light that are primarily used by green plants to fuel the chlorophyll that feeds the plants. Managers of indoor plant growing facilities might be tempted simply to increase all wavelengths of light to maximize PAR and therefore to encourage plant growth. That strategy might work, but those managers can achieve even better growth by controlling the relative concentrations of different wavelengths of visible light in their growing facilities with a spectrum that’s specifically calibrated to nourish plants at each stage of the grow cycle. That’s the OpticPAR™ approach to fine-tuning your light’s color spectrum for maximum PAR for growth and yield.