🆕 3157 US-CK LED Front Turn Signal & DRL Light Bulbs 50W 4000LM CAN-Bus Error Free Dual Color Switchback White & Amber B21-PRO Series | 2 Bulbs Decoder Resistor:(4pcs)3157 US-CK [C8 model]-[+$19.98] Warm Tip: Please never install

Warm Tip: Please never install D1S D1R led bulbs to D3S D3R ballasts

or daily use

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Automatic Deployment: 6" wide steps deploy and retract automatically when opening/closing the vehicle door

🆕 3157 US-CK LED Front Turn Signal & DRL Light Bulbs 50W 4000LM CAN-Bus Error Free Dual Color Switchback White & Amber B21-PRO Series | 2 Bulbs Decoder Resistor:(4pcs)3157 US-CK [C8 model]-[+$19.98] Warm Tip: Please never installAPPLICATION The switchback dual function only works when your original bulbs have both parking DRL and turn signal lights in one bulb. Dual color switchback function: Light up white for parking lights or daytime running lights (DRL lights); Light up amber for turn signal lights. The turn signal flashes "amber off amber off, " instead of "amber white amber white", which makes it easier to see. Plug and play, easy installation. This LED bulb only fits