SEALIGHT 3157 Switchback LED Bulbs Amber/White — Dual-Color DRL & Turn Signal, Anti-Hyper-Flash 2PC

SEALIGHT 3157 Switchback LED Bulbs are dual-color amber/white replacement lamps that act as parking/DRL and turn signal lights, delivering crisp white for daytime running and clear amber for turn signaling with built-in anti-hyper-flash support.

These SEALIGHT 3157 switchback bulbs combine bright white and vivid amber LEDs in a single 2-piece set designed for vehicles that use a single bulb for both parking/DRL and turn functions. Each lamp uses a dense array of modern 3030 LED chips behind a high-definition glass lens for stronger beam penetration and visible output. The bulbs are engineered for wide voltage tolerance, integrated driver control, and aluminum circuit boards to move heat away from the diodes for longer, stable operation.

How do these bulbs switch between parking/DRL and turn signal modes?

The bulbs automatically change color based on the vehicle circuit: white for parking or daytime running lights and amber when the turn signal is activated. They are built for dual-function sockets and detect the separate signals without manual switching.

• Dual-color design: white for DRL/parking, amber for signaling.
• Compatible with common 3157/3057/3457/4157 sockets.
• Plug-and-play wiring with no polarity to simplify installation.
• Includes resistors to help prevent hyper-flash on many vehicles.

Will these bulbs cause hyper-flashing or error codes on my car?

The bulbs feature an internal IC driver and are designed to minimize errors, but some vehicles with sensitive monitoring may still need added load. SEALIGHT includes 50W 6Ω resistors in the package for applications that require extra load to stop fast flash rates or to register correctly with the vehicle’s bulb-check system.

• Built-in driver reduces false CAN-bus errors on many models.
• Resistors included to correct hyper-flash or non-blinking issues.
• Works best in dual-function lamp housings that combine DRL and turn signals.
• May require relay or different wiring on rare or European CAN-controlled systems.

What performance and durability features do these LEDs offer?

Each lamp packs 34 high-power 3030 LED chips for strong luminous output while keeping energy use low. The assembly uses an HD glass lens and an aluminum-backed PCB for improved heat dissipation and consistent light quality over time.

• 34 high-power 3030 LED chips per bulb for intense brightness.
• HD glass lens for focused beam and better penetration.
• Aluminum circuit board for faster heat transfer and reliability.
• Wide 9–18V operating range with constant current driver inside.

How easy is installation and what sockets fit these bulbs?

Installation is straightforward: these are plug-and-play for standard US sockets and do not require polarity-sensitive wiring. They fit a broad range of related sockets, making them a flexible upgrade for many vehicles that use a combined DRL/turn bulb.

• Fits sockets: 3157, 3157A, 3057, 3155, 3157NA, 3357, 3457, 3457A, 4057, 4114, 4157, and similar.
• No polarity design simplifies replacement and reduces installation errors.
• 2-piece set includes resistors for compatibility where needed.
• Simple swap with factory bulbs in compatible dual-function housings.

Who is this for: drivers who want a single-bulb upgrade that provides crisp white for daytime visibility and bright amber for turn signaling, without changing housings or adding separate lamps. These bulbs are ideal for owners of vehicles that use a combined parking/DRL and turn-signal socket and for installers seeking a plug-and-play LED option with included resistors for better compatibility. If your vehicle has separate bulbs for DRL and turn signals, or a highly specialized CAN-bus system, double-check fit and compatibility before purchase.