Daily Light Integral [2.0]

Updated by Travis Bates

IN THIS ARTICLE

Daily Light Integral is the total number of photosynthetically active photons that impinge upon 1 m2 surface area over a 24 hour period. A good way to think of DLI is the total amount of radiation that is available for plant growth in a given day. The photosynthetic photon flux density (PPFD) is measured by the QSO-S PAR Photon Flux sensor in units of μmol m-2 s-1.  This instantaneous value is averaged over the measurement interval by the data logger.

DLI (μmol m-2) = ∑(total mols per square meter in a 24 hour period)

DLI is typically reported in mols m-2.

DLI mols m-2= DLI ((μmol m-2) / 1,000,000

The Daily Light Integral model uses measured PAR (Photosynthetically Active Radiation) to calculate an accumulated daily light integral. The time period resets daily at midnight.

Support

Daily light photoperiod can be calculated from any photon flux light sensor.

  • PAR SQ-521

New Daily Light Integral

  • On the     Data page, select    New Data.
  • Select Daily Light Integral as the type.
  • Select one or more photon flux light sources.
  • Edit the data stream color.
  • Edit the data stream name.
  • Select Create to finish.
  • The new data stream(s) will now be in your data list.

Daily light integral

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