Conversion - Lux to PPFD

NOTE: The conversion from Lux to PPFD (µmol m-2 s-1) varies under different light sources. For a complete discussion please see the reference listed below.

Lux to PPFD (µmol m-2 s-1)

Light Source Calibration Factor
Sunlight 0.0185
LED ( 6000-6500k)
Cool White Fluorescent Lamps 0.0135
Mogul Base High Pressure Sodium Lamps 0.0122
Dual-Ended High Pressure Sodium (DEHPS): ePapillion 1000 W 0.0130
Metal Halide 0.0141
Ceramic Metal Halide (CMH942): standard 4200 K color temperature 0.0154
Ceramic Metal Halide (CMH930-Agro): 3100 K color temperature, spectrum shifted to red wavelengths 0.0170

Multiply the Lux by the conversion factor to get PPFD. For example, full sunlight is 108,000 Lux or 2000 µmol m-2 s-1 (108,000 ∗ 0.0185).
PPFD (µmol m-2 s-1) to Lux

Light Source Conversion Factor
Sunlight 54
LED
Cool White Fluorescent Lamps 74
Mogul Base High Pressure Sodium Lamps 82
Dual-Ended High Pressure Sodium (DEHPS): ePapillion 1000 W 77
Metal Halide 71
Ceramic Metal Halide (CMH942): standard 4200 K color temperature 65
Ceramic Metal Halide (CMH930-Agro): 3100 K color temperature, spectrum shifted to red wavelengths 59

(Multiply the PPFD by the conversion factor to get Lux. For example, full sunlight is 2000 µmol m-2 s-1 or 108,000 Lux (2000 ∗ 54).)

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