It is important to know what colors will look like under your LED lighting. This is known as the color rendering index, or CRI. A CRI is more important in retail or office settings, where differences in color can lead to frustrated customers. (No one wants to go home with a navy sweater they thought was black, for instance, or see a stack of apples in a grocery store that looks rather orange instead of bright red.) But if you want to make sure you're seeing the right colors in your house, look for LED bulbs with a CRI rating higher than 80.