CRI, or Color Rendering Index, is the latest buzzword in consumer lighting circles. With the current phasing out of traditional incandescent bulbs, many consumers are scrambling to understand their remaining choices. Savvy lighting manufacturers understand this, and have invested a great deal in educating customers about things like color temperature, lumens, and now CRI. So how does CRI work? Basically, take a light bulb and shine it onto a few bright, colorful items. How natural do their colors look? Color Rendering Index is a mathematical measure of this, where a light source is tested and given a score from 0-100. Any light bulb, tube, or strip that measures greater than 90 is typically considered “High CRI”, and thus very effective at rendering natural-looking color at a given color temperature. As a point of reference, many of the fluorescent or other types of lighting that people consider “harsh” or “artificial” measure in the 50-70 CRI range.   Take a look at the two photos above. In the first photo, under lights rated at CRI 57, the orange bell pepper has lost much of its natural color, appearing almost yellow. Similarly, the green apple, red bell pepper, and yellow marker appear dull and lifeless. In the second photo, under CRI 93 lighting, the colors are much more alive in comparison, down to the white board on which everything is placed. Testing for CRI requires special machinery designed specifically for this purpose. During this test, a lamp is shone onto eight different colors (or “R values”), termed R1 through R8. The lamp receives a score from 0-100 for each color, based on how natural the color is rendered in comparison with how the color looks under a “perfect” or “reference” light source at the same color temperature...