PPF, PPFD & DLI

Photosynthetic Photon Flux (PPF) PPF is short for Photosynthetic Photon Flux. PPF is measured in micromoles per second, or ┬Ámol/s. It expresses the number of photons or total amount of PAR emitted by a light source every second. Photons are small particles that carry the electromagnetic energy of light. The PPF value says something about the total light output that can contribute to photosynthesis. PPF can be measured with a specialized instrument called an integrating

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