Difference between revisions of "Light"

[[File:Ledtints.jpg|thumb|300px|Side-by-side comparison of different flashlight tints. Click for full caption.]]Different LEDs and different types of lights produce varying tints of light. Small differences in the production of LEDs can produce differing tints. The LEDs are evaluated and grouped in bins based on the resulting tint. Most LEDs 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 LEDs 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. Tints are often measured by Correlated Color Temperature, which assigns a value in degrees Kelvin to different tints, from 6500K for cool white to 2700K for warm white, with 4500K being neutral.