The equation for converting Photosynthetic Photon Flux Density (PPFD) to DLI, assuming constant PPFD, is below. </blockquote>whereLight-hours is the number of hours in a day active photons are delivered to the target area, measured in hours.
Note that the factor 3.6·10 is due to the conversion factors coming from μmol being converted to mol and the unit of hours (from Light-Hours) being converted to seconds.