Light: Difference between revisions

Different LED's and different types of lights produce varying tints of light. Small differences in the production of LED's can produce differing tints. The LED's are evaluated and grouped in bins based on the resulting tint. Most LED's have a cool white tint which is slightly blue. However some people prefer a more neutral light. Because more phosphor is added to obtain a neutral tint and the phosphor blocks some of the blue light, neutral LED's are not as bright as cool white ones. Warm white has more of an orange color and is even less bright, adding yellow and other colors of phosphor. But the result is broader spectrum of light that does a better job of rendering colors, a quality measured by a color rendering index (CRI) where a value of 100 accurately shows all colors in the spectrum. High CRI LED's are available but usually only in warm tints.