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Possible Answers: DLI.
Random information on the term “DLI”:
Daily light integral (DLI) describes the number of photosynthetically active photons (individual particles of light in the 400-700 nm range) that are delivered to a specific area over a 24-hour period.
The daily light integral (DLI) is a function of photosynthetic light intensity and duration (day) and is usually expressed as moles of light (mol) per square meter (m−2) per day (d−1), or: mol·m−2·d−1. In other words, DLI measures the number of photosynthetically active photons (photons in the PAR range) accumulated in a square meter over the course of a day.
DLI is usually calculated by measuring the Photosynthetic Photon Flux Density (PPFD) in μmol·m−2·s−1 (number of photons in the PAR range received in a square meter per second) as it changes throughout the day, and then using that to calculate total estimated number of photons in the PAR range received over a 24-hour period for a specific area. In other words, DLI describes the sum of the per second PPFD measurements during a 24-hour period.