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About DLI Calculator

Daily Light Integral (DLI) is the total amount of light photons a plant receives in a day. It's like a rain gauge for light.

Formula

PPFD (µmol/m²/s) × Hours × 0.0036 = DLI (mol/m²/day)

Targets

  • Microgreens/Lettuce: 12-17 DLI.
  • Tomatoes/Peppers: 20-30 DLI.
  • Cannabis (Flower): 30-45+ DLI.

How to Use

Enter the PPFD reading from your light meter and the Hours the light is ON.