SYLVANIA - 3155 ZEVO LED White Bulb - Bright LED Bulb, Ideal for Daytime Running Lights (DRL) and Back-Up/Reverse Lights (Contains 2 Bulbs) 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 3155 in pairs for optimum performance. DELIVERS A BRIGHTER, WHITER & SHARPER LIGHT: This is a 6000K WHITE LED bulb  Ideal for daytime running lights (DRL) and back-up/reverse lights. ACHIEVE FULL BRIGHTNESS INSTANTLY FOR INCREASED SAFETY: These 3155 ZEVO LEDs light up instantly for increased performance, giving drivers around you more time to react 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 100+ years in business, Sylvania is the world leader in automotive lighting for Original Equipment Manufacturers (OEMs) and the aftermarket.