These High Intensity LED Dual Color SwitchBack Replacement Bulbs are the brightest LED replacement bulbs we sell and the newest craze in the LED lighting arena. Featuring 60 high intensity LEDs (30 Amber and 30 White), these LED Replacement bulbs have a 100,000 hour lifetime, a 360 degree viewing angle (when you only have LEDs on the top and not on the sides of an LED bulb it has a very narrow lighting effect that leaves you disappointed), and a lifetime warranty through the manufacturer. They also use a fraction of the power of a traditional filament bulb and put out virtually no heat. Once installed, you'll have a white LED running light. As soon as you turn on the turn signal, it will change color to Amber until you turn off your turn signal. These High Intensity LED Replacement bulbs are a plug and play replacement for bulbs sized 3157. Sold as a single piece, so if you need a pair, be sure to order two. Please consult your vehicle owners manual if you are not sure which size bulbs you need.