DLI Chart Cannabis grow room tool DLI Recommendations by Plant Age Daily Light Integral targets from seedling through maturing. Use these as a planning baseline for normal growth without added CO2. 45peak mol/m²/day Recommended DLI by week Recommended DLI Light cycle DLI formula: DLI = PPFD × photoperiod (hours) × 3600 / 1,000,000. For example, 600 µmol/m²/s for 18 h is 600 × 18 × 3.6 / 1000 = 38.9 mol/m²/day. PPFD → DLI Calculator Enter your canopy PPFD and photoperiod to estimate daily light integral. PPFD Hours/day Calculate DLI mol/m²/day