>>4408344CRI is irrelevant if not harmful for digitizing negatives, quit repeating that bullshit. Negatives do not transmit a continuous spectrum of frequencies, they contain 3 or 4 dyes in varying quantities. In addition, the sensor does not capture a continuous spectrum, it captures three channels which each have a particular response.
To get the best scan you want to maximize the intersection of the dye colors with the sensor responses, and minimize the intersection between channels. The ideal light source produces something like 3 sharp spikes centered at the peak of the three dye colors. A high CRI light source will give worse results as it will muddle the channels.
