Lights Dim Over Time, Replace In Pairs: Your lights are a pair, one is never turned on without the other. If one bulb burns out, the other isn't far behind. Replace your 6418 in pairs for optimum performance. Delivers A Brighter, Whiter and Sharper Light: This is a 6000K WHITE LED bulb – Ideal for interior lighting – map, dome, trunk, cargo and license plate Achieve Full Brightness Instantly For Increased Safety: These 6418 ZEVO LEDs light up instantly for increased performance compared to standard incandescent bulbs' slower light up speed. May Require A Load Equalizer For Optimum Performance: To help prevent hyper flashing, it is suggested that a load equalizer be installed. See Sylvania's Load Equalizer product. The Sylvania Standard Of Quality: With over 100 years in business, Sylvania is the world leader in automotive lighting for Original Equipment Manufacturers (OEMs) and the aftermarket.