Luminous Efficacy Tables

The light sensitivity of the normal human eye has been studied extensively. The response of the eye as a function of frequency is called the luminous efficacy of the eye. It has been tabulated for both the light-adapted (photopic) case and the dark-adapted (scotopic) case.

Wavelength
l (nm)
Photopic Luminous EfficacyVl
Photopic Conversionlm/W
ScotopicLuminous EfficacyVl
Scotopic Conversionlm/W
380
0.000039
0.027
0.000589
1.001
390
0.000120
0.082
0.002209
3.755
390
0.000120
0.082
0.002209
3.755
400
0.000396
0.270
0.009290
15.793
410
0.001210
0.826
0.034840
59.228
420
0.004000
2.732
0.096600
164.220
430
0.011600
7.923
0.199800
339.660
440
0.023000
15.709
0.328100
557.770
450
0.038000
25.954
0.455000
773.500
460
0.060000
40.980
0.567000
963.900
470
0.090980
62.139
0.676000
1149.200
480
0.139020
94.951
0.793000
1348.100
490
0.208020
142.078
0.904000
1536.800
500
0.323000
220.609
0.982000
1669.400
507
0.444310
303.464
1.000000
1700.000
510
0.503000
343.549
0.997000
1694.900
520
0.710000
484.930
0.935000
1589.500
530
0.862000
588.746
0.811000
1378.700
540
0.954000
651.582
0.655000
1105.000
550
0.994950
679.551
0.481000
817.700
555
1.000000
683.000
0.402000
683.000
560
0.995000
679.585
0.328800
558.960
570
0.952000
650.216
0.207600
352.920
580
0.870000
594.210
0.121200
206.040
590
0.757000
517.031
0.065500
111.350
600
0.631000
430.973
0.033150
56.355
610
0.503000
343.549
0.015930
27.081
620
0.381000
260.223
0.007370
12.529
630
0.265000
180.995
0.003335
5.670
640
0.175000
119.525
0.001497
2.545
650
0.107000
73.081
0.000677
1.151
660
0.061000
41.663
0.000313
0.532
670
0.032000
21.856
0.000148
0.252
680
0.017000
11.611
0.000072
0.122
690
0.008210
5.607
0.000035
0.060
700
0.004102
2.802
0.000018
0.030
710
0.002091
1.428
0.000009
0.016
720
0.001047
0.715
0.000005
0.008
730
0.000520
0.355
0.000003
0.004
740
0.000249
0.170
0.000001
0.002
750
0.000120
0.082
0.000001
0.001
760
0.000060
0.041
0.000000
0.000
770
0.000030
0.020
0.000000
0.000
Index

Photometry concepts

Vision concepts
 
HyperPhysics***** Light and Vision R Nave
Go Back