Are the 3157 and 3047 bulbs compatible?

The 3157 and 3047 bulbs are not directly compatible, as they have different bases and wattage ratings. The 3157 bulb is a dual-filament bulb typically used for brake lights and turn signals, while the 3047 is a single-filament bulb often used for interior lighting. Always consult your vehicle's manual or specifications to ensure you're using the correct bulb type for your application.