Today high CRI LEDs are pretty common, amazingly a common white LEDs type contains phophorous to emit whilte light, like those good lamps...
Se here white LEDs section: https://en.wikipedia.org/wiki/LED_lamp
Also perfect scans can be made with 3 monochromatic sources, a 3D LUT would map all perfectly, see color separation to preserve color movies, using 3 BW films.
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