Biology

Daily Light Integral Calculator

Find DLI from light intensity and hours.

Calculated Output

Daily Light Integral (mol/m²/day) 23.04

Formula: DLI = PPFD × hours × 3600 ÷ 1,000,000

Step-by-Step Breakdown

1. Values used:

2. Light intensity (PPFD) = 400 µmol/m²/s

3. Hours of light = 16

5. Daily Light Integral = 23.04mol/m²/day

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The math behind it

DLI = PPFD × hours × 3600 ÷ 1,000,000 (converts per-second light to moles per day).

400 PPFD for 16 h → 23 mol/m²/day.

Targets?

Leafy greens ~12–17, fruiting plants ~20–30 mol/m²/day.