Certified Professional Photographer (CPP) Practice Exam

In the context of artificial lighting for photography, the Color Rendering Index (CRI) is a crucial metric that measures the accuracy of light sources in displaying colors as they would appear under natural light. A CRI value of 90 or above is generally considered to provide the best conditions for accurately capturing the true colors of a subject. This high level of color fidelity is essential for professional photographers who aim to reproduce vibrant and true-to-life images.

Lighting with a CRI of 90 ensures that the colors are rendered with great precision, which is particularly important when working in artistic fields, product photography, portraits, and any situation where color accuracy is imperative. Using lights with a lower CRI can lead to discrepancies in color, potentially compromising the overall quality and appeal of the images.

While other options may be usable in certain scenarios, they do not match the level of color accuracy and fidelity provided by a CRI of 90. Therefore, photographers seeking to achieve the best artificial light conditions should prioritize a lighting source with a CRI of 90 or higher.