The TLCI metric (Television Lighting Consistency Index) was developed as an alternative to address the shortcomings of the commonly used CRI when used with photography equipment. Because the way cameras interpret light is slightly different to how humans perceive it, the TLCI attempts to provide a more accurate prediction of color fidelity of a light source for broadcast use.

CRI tells us about how a light source renders colors based on human perception. CRI, however, does not necessarily paint a complete picture about how the light source might render colors on camera or on film. Thus, a light source with a high CRI is not necessarily a light source fit for use in film and photography. To this end, the TLCI (Television Lighting Consistency Index) was developed. The metric is analogous to CRI in that a high TLCI metric tells us that a light source will render colors well in a film or photography context.

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