I'm curious how... the CRI value of a source will effect the final look.
A major problem with low CRI sources is that gels (party, effects or color correction) do not produce the same repeatable result that you’d expect from gelling a high CRI continuous source like tungsten.
Take for example the discontinuous spectrum of even high CRI remote Phosphor LEDs like the Cineo Trucolor. As you can see by the spectral distribution graph for the Cineo with 3200K panel above, they have a spike in the blue range that does not exist in the continuous spectrum of a tungsten light source (green line.) The greater proportion of blue and green/cyan in the Cineo Trucolor 3200 will result in an unexpected and undesirable result if a color correction (CTO, CTS, CTB), or color effect gel (Congo Blue, Bastard Amber, etc.) calibrated for the continuous spectrum of tungsten light is used on this discontinuous spectrum of a 3200K remote phosphor LED.
The same is true of the Cineo Trucolor with the 5600K panel above. The quite prominent blue spike (black line) will likewise result in an unexpected and undesirable result if a color correction, or color effect, gel calibrated for the continuous spectrum of a continuous daylight source is used on the discontinuous spectrum of a 5500K remote phosphor LED.
Color correction and color effect gels are a part of a finely calibrated imaging system that involves a highly specific light receptor (film emulsion or video sensor), light sources, and color correction or effects gels calibrated for both. Where that exists between film emulsions/video sensors and tungsten and/or daylight sources it is possible to mix dyes in a gelatin materials to create desired effects (it has taken decades to hone this system.) To use the available color correction and effects gels on the discontinuous spectrum of LEDs is a misapplication of a finely tuned system designed for continuous spectrum light sources only. Use this link for examples of what happens when you put a color effects gel designed for tungsten source on the discontinuous color spectrum of LEDs.
Guy Holt, Gaffer, ScreenLight & Grip, Lighting Rental and Sales in Boston.