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Aquarium Lighting, Aquarium Lighting Q&A's, Q&A's

What is PAR?

Photosynthetically Active Radiation (PAR) PAR is the section of the spectral range of light between 400 – 700 nanometres which is needed by plants, corals, clams, anemones and nudibranchs for photosynthesis. This is found from actinic UVA to near-infrared. (Graph 1)

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