20 Nov What is PPFD?
Posted at 14:26h
in Science
Before light can be effective in a photochemical reaction (whether photosynthetic or photomorphogenic), it must first be absorbed.
Photosynthetic Photon Flux Density (PPFD) is the measurement of PAR delivered to a specific area. It is expressed as micromole-per-meter squared-per second (μmol/m2/s).
This is the only measurement that informs us of the amount of light being delivered to a crop which enables photosynthesis.
Fluence SPYDR and VYPR systems are designed specifically for PPFD, not PPF.