The International System of Units (SI), ninth edition, SI Brochure / Mise en pratique for the definition of the candela and associated derived units for photometric and radiometric quantities in the SI (2021)

By Consultative Committee for Photometry and Radiometry.

Online text: www.bipm.org/documents/20126/41489685/SI-App2-candela.pdf

Cited passages: Appendix 2, v1.02, 22 March 2021, §3.1, printed pp. 2–3: wavelength convention, normalized functions and interpolation; §3.1, equation (2), printed p. 3: spectral weighting normalized at the defining frequency; §3.1, printed p. 3: photopic and scotopic luminous efficiency functions.