Photopic to Scotopic trolands

Conversion of photopic troland values (Tp) to scotopic troland values (Ts) for spectral stimuli of different wavelength lambda and for blackbody radiators of different temperatures T(K)

                 Spectral stimuli                  |  Blackbody Radiators of
                                                   |  Different Temperatures

lambda (nm)       k*      lambda (nm)       k*     |   T(K)          k2#

    400         58.39         550         1.2000   |   1000        0.2650

    410         71.67         560         0.8220   |   1250        0.4350

    420         60.11         570         0.5430   |   1500        0.6100

    430         42.87         580         0.3470   |   1750        0.7810

    440         35.51         590         0.2150   |   2000        0.9430

    450         29.80         600         0.1310   |   2042        1.0000

    460         23.52         610         0.0788   |   2250        1.0930

    470         18.49         620         0.0481   |   2500        1.2350

    480         14.20         630         0.0313   |   2750        1.3630

    490         10.82         640         0.0213   |   2856(A)     1.4110

    500          7.57         650         0.0157   |   3000        1.4810

    510          4.93         660         0.0128   |   3500        1.6890
 
    520          3.28         670         0.0115   |   6000        2.3580

    530          2.34         680         0.0105   |   6500(D65)   2.4640

    540          1.70         690         0.0107   |   7000        2.5210

                              700         0.0108   |

After Wyszecki & Stiles (1982), Table 1(2.4.4), p. 104.

References

Wyszecki, G., & Stiles, W. S. (1982). Color Science (2nd ed.). New York: Wiley.

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