Chapter 2. Key Terms
You can’t get very far talking about LED lighting without understanding the lingo. Of course, terms like “lumens” and “kilowatt-hour” are important, but a new technology always introduces new concepts to understand.
Color Rendering Index (CRI) and Color Quality Scale (CQS)
CRI is technically, according to the American National Standards Institute, the measure of how similar colors appear under illumination by a test source, compared to under a reference source that has the same correlated color temperature.
In practice, it’s often known as the color accuracy, a numerical rating of the color quality produced by a light source. Incandescent bulbs are the benchmark for the test (scoring 100) while a good LED bulb will be rated at ...
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