光照单位的转换 Conversion - PPF (μmol m-2 s-1) to Lux
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Definitions Source
Thimijan, Richard W., and Royal D. Heins. 1982. Photometric, Radiometric, and Quantum Light Units of Measure: A Review of Procedures for Interconversion. HortScience 18:818-822.
200
10,800
16,400
14,200
14,800
300
16,200
24,600
21,300
22,200
600
32,400
49,200
42,600
44,400
1000
54,000
82,000
71,000
74,000
2,000
108,000
164,000
142,000
148,000
Definitions
0.0154
Ceramic Metal Halide (CMH930-Agro): 3100 K color temperature, spectrum shifted to red wavelengths
59
Ceramic Metal Halide (CMH930-Agro): 3100 K color temperature, spectrum shifted to red wavelengths
Photometric Units, Illuminance
Foot-candle:
one lumen per square foot. The 16th General Conference on Weights an Measures (CGPM), Oct. 1979, decided that the candela is the luminous intensity of a source emitting monochromatic radiation of frequency 540 x 1012Hz and radiant intensity 1/683 watt per steradian. This corresponds to 683 lumens per watt of radiation at approximately 555 nm wavelength, which is near the maximum of the standard photopic spectral luminous efficiency curve.
Conversion - PPF (μmol m-2s-1) to Lux
NOTE: The conversion from PPF (μmol m-2s-1) to Lux varies under different light sources. For a complete discussion please see the reference listed below.
Micromole:
per second and square meter (μmol m-2s-1). This term is based on the number of photons in a certain waveband incident per unit time (s) on a unit area (m2) divided by the Avogadro constant (6.022 x 1023mol-1). It is used commonly to describe PAR in the 400-700 nm waveband.
Mogul Base High Pressure Sodium Lamps
82
Mogul Base High Pressure Sodium Lamps
0.0122
Dual-Ended High Pressure Sodium (DEHPS): ePapillion 1000 W
77
Dual-Ended High Pressure Sodium (DEHPS): ePapillion 1000 W
0.0170
Multiply the PPF by the conversion factor to get Lux. For example, full sunlight is 2000 μmol m-2s-1or 108,000 Lux (2000∗54).
Multiply the Lux by the conversion factor to get PPF. For example, full sunlight is 108,000 Lux or 2000 μmol m-2s-1(108,000∗0.0185).
Conversion Factors
PPF (μmol m-2s-1) to Lux
Lux to PPF (μmol m-2s-1)
Sunlight
54
Sunlight
0.0185
Cool White Fluorescent Lamps
74
Cool White Fluorescent Lamps
0.0135
LUX:
one lumen per square meter; differs from foot-candle by about a factor of 10.
Quantum Units, Photon Flux Density
Microeinstein:
per second and square meter (μE m-2s-1). The einstein has been used to represent the quantity of radiant energy in Avogadro's number of photons and also Avogadro's number of photons. The second definition has the einstein equal a mole of photons. While commonly used as a unit for photosynthetically active radiation (PAR), the einstein is not an SI unit.
PPF to Lux Reference Table
PPF (μmol m-2s-1)
Lux (Sunlight)
Lux (HPS)
Lux (Metal Halide)
Lux (Fluorescent)
10
540
8540
820
710
740
100
5,400
8,200
7,100
7,400
0.0130
Metal Halide
71
Metal Halide
0.0141
Ceramic Metal Halide (CMH942): standard 4200 K color temperature
65
Ceramic Metal Halide (CMH942): standard 4200 K color temperature
Thimijan, Richard W., and Royal D. Heins. 1982. Photometric, Radiometric, and Quantum Light Units of Measure: A Review of Procedures for Interconversion. HortScience 18:818-822.
200
10,800
16,400
14,200
14,800
300
16,200
24,600
21,300
22,200
600
32,400
49,200
42,600
44,400
1000
54,000
82,000
71,000
74,000
2,000
108,000
164,000
142,000
148,000
Definitions
0.0154
Ceramic Metal Halide (CMH930-Agro): 3100 K color temperature, spectrum shifted to red wavelengths
59
Ceramic Metal Halide (CMH930-Agro): 3100 K color temperature, spectrum shifted to red wavelengths
Photometric Units, Illuminance
Foot-candle:
one lumen per square foot. The 16th General Conference on Weights an Measures (CGPM), Oct. 1979, decided that the candela is the luminous intensity of a source emitting monochromatic radiation of frequency 540 x 1012Hz and radiant intensity 1/683 watt per steradian. This corresponds to 683 lumens per watt of radiation at approximately 555 nm wavelength, which is near the maximum of the standard photopic spectral luminous efficiency curve.
Conversion - PPF (μmol m-2s-1) to Lux
NOTE: The conversion from PPF (μmol m-2s-1) to Lux varies under different light sources. For a complete discussion please see the reference listed below.
Micromole:
per second and square meter (μmol m-2s-1). This term is based on the number of photons in a certain waveband incident per unit time (s) on a unit area (m2) divided by the Avogadro constant (6.022 x 1023mol-1). It is used commonly to describe PAR in the 400-700 nm waveband.
Mogul Base High Pressure Sodium Lamps
82
Mogul Base High Pressure Sodium Lamps
0.0122
Dual-Ended High Pressure Sodium (DEHPS): ePapillion 1000 W
77
Dual-Ended High Pressure Sodium (DEHPS): ePapillion 1000 W
0.0170
Multiply the PPF by the conversion factor to get Lux. For example, full sunlight is 2000 μmol m-2s-1or 108,000 Lux (2000∗54).
Multiply the Lux by the conversion factor to get PPF. For example, full sunlight is 108,000 Lux or 2000 μmol m-2s-1(108,000∗0.0185).
Conversion Factors
PPF (μmol m-2s-1) to Lux
Lux to PPF (μmol m-2s-1)
Sunlight
54
Sunlight
0.0185
Cool White Fluorescent Lamps
74
Cool White Fluorescent Lamps
0.0135
LUX:
one lumen per square meter; differs from foot-candle by about a factor of 10.
Quantum Units, Photon Flux Density
Microeinstein:
per second and square meter (μE m-2s-1). The einstein has been used to represent the quantity of radiant energy in Avogadro's number of photons and also Avogadro's number of photons. The second definition has the einstein equal a mole of photons. While commonly used as a unit for photosynthetically active radiation (PAR), the einstein is not an SI unit.
PPF to Lux Reference Table
PPF (μmol m-2s-1)
Lux (Sunlight)
Lux (HPS)
Lux (Metal Halide)
Lux (Fluorescent)
10
540
8540
820
710
740
100
5,400
8,200
7,100
7,400
0.0130
Metal Halide
71
Metal Halide
0.0141
Ceramic Metal Halide (CMH942): standard 4200 K color temperature
65
Ceramic Metal Halide (CMH942): standard 4200 K color temperature