Upgrade your vehicle's lighting with these 1157 switchback LED bulbs that seamlessly transition between white and amber colors. These dual-function bulbs serve as both daytime running lights (DRL) and turn signals, offering exceptional visibility with 600% increased brightness compared to standard bulbs. Compatible with 2057, 2357, 7528, and BAY15D sockets, these bulbs feature built-in resistors and CANBUS error-free technology to prevent hyper flashing issues common in LED upgrades. Perfect for parking lights and turn signals, these bulbs maintain consistent performance without error codes on your dashboard. The switchback functionality provides crisp white light for regular operation and switches to amber when signaling turns. Their plug-and-play design makes installation straightforward, while the advanced circuitry ensures reliable operation. Ideal for drivers looking to modernize their vehicle's lighting system with enhanced visibility and style.