High Power 5630 Chip 3157 Dual Color Switchback LED Turn Signal Light Bulbs Package Content: 2 LED Light Bulbs Color: Type 1 switchback, White / Amber Compatible with: 3157 Professional installation is highly recommended (No instruction included) Note: When using LED bulbs for turn signal, you will need to use load resistor or decoder set to prevent hyper flash or bulb malfunction.