2x 3157 Switchback LED Front Turn Signal Light Bulb for Dodge Ram 1500 2500 3500 Feature: This Lamp is 60SMD 3157 4014 Dual Color LED bulbs. Switchback LED lights are also known as dual-color LED.which are dual-function LED bulbs that stay lit as white in parking/position light mode and flash amber when the turn signals are used. These are specifically designed for front turn signal lights or daytime running lights. This kind of switchback LED will give you a nice HID-matching look when operating as the parking lights and are legal since they flash amber when the turn signals are used. Bulb is white when parking lights are on,signals amber only when turn signals are activated and returns to white once turn signal is deactivated. Specification: 100% New Plug Type:3157 4014 Voltage:12-24V Light Color: Amber/White Lifespan: 50000 working hours Power source30 (W) Note: Please note that most cars required LED resistors when switching from halogen turn light bulbs to LED to avoid hyper flashing and low wattage issue. If this is the first time you use LED bulbs on turn light, please use load resistors(NOT inclued)with new bulbs. Pleas check the plug type of your vechicle when you buy,thank you! Package Included: 2X 3157 4014 60Led Dual Color Switchback Light