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Figure 2. Comparison of three different spectral weighting functions for prediction of spectral sensitivity (top row) and absolute nocturnal melatonin suppression by polychromatic “white” light sources (bottom row). (Legend light source [LS] notes: a) Nagare, Rea, Plitnick, & Figueiro 2019a; b) Nagare, Rea, Plitnick, & Figueiro 2019b; c) Nagare, Plitnick, & Figueiro 2019; d) LRC unpublished data.)