Grow Light DLI Calculator

Compute daily light integral (DLI) in mol/m²/day from your fixture's PPFD and photoperiod. Optionally compare against a selected plant's published DLI range.

PPFD (µmol/m²/s)

Measure at canopy height with a quantum sensor. Fixture spec sheets usually list the peak value directly under the lamp — canopy averages are lower.

Photoperiod (hours per day)

Plant (optional)

Only plants with a published DLI range are listed. Omission is intentional — species without published DLI are tracked without fabricated ranges.

Daily light integral17.28 mol/m²/day

Match vs plant range

Select a plant with a published DLI range to see a match.