Table T-4: Definitive Values of the Special Luminous Efficiency Function for Photopic Vision V(λ)


NOTE: This table’s section number was changed in RP-16-17 Addendum 1.  The previous section number was 13.4.


    • Information in this table was obtained from CIE 18.2 (1983), The Basis of Physical Photometry, 2nd ed.


    • Values of V(λ) are expressed with as many as 13 significant digits. Therefore, the digits are shown in triplets.


    • Σ V(λ) = 106.856917101172.


« Back to Definitions Index