Fig. 1. 460 nm LED spectra fitting by spectral radiation model

Fig. 2. Experimental results of spectral irradiance as a function of drive current

Fig. 3. Spectra of 11 monochrome LEDs chosen to be used in the experiment

Fig. 4. Experimental result for 11 monochrome LED spectrum synthesis

Fig. 5. Realizations of AM1.5 spectral distributions by different equal intervals. (a) 15 nm; (b) 20 nm; (c) 30 nm

Fig. 7. Relationship between the used-LED number of different LED combinations and evaluation parameter R²

Fig. 8. Spectral synthesis results of two optimized groups including 17 monochrome LEDs . (a) Group Ⅰ; (b) group Ⅱ