Auxbeam 3157 Switchback LED Bulbs — White DRL & Amber Turn, 22×2835 SMD, IP68 Waterproof

Auxbeam 2026 B1B Series 3157 Switchback LED bulbs deliver bright white running lights and instant amber turn signals in one plug-and-play unit.

If you want to replace factory 3157/3457-style bulbs with a modern dual-color LED that stays lit as a white parking/DRL light and flashes amber for turn signals, the Auxbeam B1B set provides a durable, high-output solution. Each bulb combines 22 customized 2835 SMD chips with an HD lens and included load resistors so you get consistent illumination, correct flash rate, and broad compatibility with common sockets.

How bright are these Auxbeam 3157 switchback LEDs?

Each bulb uses multiple high-efficiency 2835 SMD chips to produce far more visible light than a standard halogen while consuming a fraction of the power. The integrated lens design helps throw a clear 360° beam for parking and signal functions.

• 22 customized 2835 SMD chips per bulb for strong output
• Approximately 5.5 W per bulb, lower energy draw than halogen
• 360° beam with HD glass lens for uniform coverage
• Instant-on performance with no warm-up delay

What does "switchback" mean and how does it work on my vehicle?

"Switchback" bulbs show white light for parking or DRL and switch to amber when the turn signal activates. The B1B design keeps the white illumination on while the turn signal alternates to amber, avoiding complete dark intervals and maintaining daytime visibility.

• White output for parking lights/DRL, amber for turn signal
• Alternating amber-white flash pattern rather than amber-off
• Maintains white light during signaling for continuous visibility
• Plug-and-play fit for common 3157-style sockets

Will these LEDs work with my car without cause a hyper-flash or warnings?

Because many vehicles expect higher resistance from halogen bulbs, installation of load resistors is often necessary. Auxbeam includes 50 W 6 ohm resistors in the package to correct flash rate and prevent dashboard errors; resistors should be secured to metal for heat dissipation.

• Includes two 50 W 6Ω load resistors to prevent hyper-flash
• Proper installation reduces dashboard error messages
• Resistors must be mounted to a metal surface for cooling
• If a bulb fails to light, reversing bulb polarity often resolves it

How durable are these bulbs and what maintenance should I expect?

Auxbeam engineered the B1B series with thermal control chips and an upgraded aluminum housing to lower operating temperature and extend lifespan. The units are IP68-rated against dust and water, making them suitable for varied weather and road conditions with minimal upkeep.

• IP68 waterproof and dustproof rating for harsh conditions
• Built-in temperature control chips for cooler operation
• Aluminum body for faster heat dissipation and longer life (up to ~40,000 hours)
• Simple polarity reversal if bulb does not light on first try

Who is this for? Drivers seeking a straightforward, high-visibility upgrade for parking and turn signal lighting—especially those replacing 3157/3457-style halogen bulbs—will appreciate the Auxbeam B1B switchback set. It’s intended for vehicle owners who want brighter, energy-efficient lights with a clean white DRL look plus compliant amber signaling, and who are comfortable fitting the supplied resistors when the vehicle’s electronics require added load.