Feit Electric 20-watt T4 Xenon Lights produce a whiter, brighter light, run cooler, and last longer than halogen bulbs. They output 170 lumens of 3000K Bright White light with a high color rendition (CRI) of 99 for more vibrant and true-to-life color ideal for task and desk lighting. These bulbs are fully dimmable and rated for an average life span of 4,000 hours or 3.7 years. The estimated annual energy cost is only $2.41.