A low CRI severely increases the risk of Metamerism because low-CRI light has an incomplete and gapped spectrum. These gaps cause specific colors that look correct under the Standard Illuminant D50 to be rendered differently (e.g., dull or tinted) under the low-CRI light. If two colors appear identical under a low-CRI light but different under natural light, this is a failure in Color Management.

To prevent this, quality control officers must measure the light quality (CRI and CCT) using accurate instruments. Calibration must be performed using spectrophotometers or specialized light analyzers. These devices can measure ambient light and verify that the light booth both accurately maintains 5000 Kelvin and provides a CRI above 90. This action ensures that visual color correction decisions are based on accurate spectral representation, preventing color inconsistencies in later production stages.