What is PPFD and PBFD and How Are They Measured?
Photosynthetic Photon Flux Density (PPFD) is the metric used to measure PAR over a square meter. It is a total count of light energy (in photons) from 400nm to 700nm that reaches a particular point on a plane. Photobiological Photon Flux Density (PBFD) is the metric used to measure PBAR over a square meter. It…