Color rendering index (CRI) is a measurement used for lightbulbs to judge the accuracy of perceived color under artificial light. It is measured on a scale of 1-100, where the higher the number, the closer to standard colors objects will appear. A compact fluorescent lamp/lightbulb (CFL) with an 80 or above is suitable for residential use. An example of how it will make a big difference is in a closet when trying to make sure you have two blue socks instead of a blue and a brown one!

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