Light Calculator
Convert Lux to PPFD and DLI for optimal lighting.
Calculate PPFD & DLI
Enter your light measurement in Lux
How long are lights on each day?
Area covered by lights (m²)
Different LED types have different efficiency factors
Results
PPFD
0
µmol/m²/s
DLI
0
mol/m²/d
Optimal DLI Ranges
Seedlings
2-8 mol/m²/d
Ideal: 4 mol/m²/d
Vegetative
8-15 mol/m²/d
Ideal: 12 mol/m²/d
Flowering
12-30 mol/m²/d
Ideal: 20 mol/m²/d
What is PPFD & DLI?
PPFD measures photons hitting your plants per square meter per second. It's the intensity your plants actually receive.
DLI is total daily light - PPFD × hours. Think of it as your plant's "daily food" of light.
DLI = PPFD × photoperiod × 3.6 / 1,000,000
LED Conversion Factors
Full Spectrum15
Quantum Boards16
Red/Blue LEDs12
High-End LEDs18
COB LEDs20
Lux ÷ Factor = PPFD