iBrightstar Switchback LED Bulbs 3157/4157 Pack — Projector Lens, White DRL and Amber Turn Signals

iBrightstar Switchback LED bulbs deliver bright xenon-white daytime running lights and clear amber turn signals in one plug-and-play replacement. These dual-color projector LEDs replace common 3157-family sockets to upgrade parking lights, daytime running lights (DRL), and turn signals with a compact aluminum housing, integrated lens and high-efficiency SMD chips. Each bulb combines 72 SMD 3014 diodes for white lighting and 4 SMD 3030 diodes for amber, producing a sharp, modern beam while keeping power draw low and heat managed by the full aluminum body and constant-current driver.

How do these bulbs switch between white for DRL and amber for turn signals?

iBrightstar switchback bulbs use separate LED arrays inside a single cartridge: the white array runs when the parking/DRL circuit is active, and the amber array lights for the turn signal circuit. The projector lens shapes each color into a focused beam so the lighting appears distinct and easy to read.

• White: 72 SMD 3014 chips for bright, even parking/DRL illumination.
• Amber: 4 SMD 3030 chips produce vivid turn-signal flashes.
• Projector lens concentrates output for better visibility and appearance.
• Built-in constant-current IC for stable brightness and longer life.

Will these LEDs fit my vehicle and how do I install them?

The bulbs are designed to replace many 3157-family sockets (3157, 4157, 3155, 3457 and related variants). Installation is plug-and-play in most applications: remove the old bulb, insert the iBrightstar unit and test each function. Before ordering, verify your socket type and compare physical dimensions to avoid fitment issues.

• Compatible with 3157 3157A 3057 3155 3357 3457 4057 4114 4157 and similar sockets.
• Working voltage 9–24V (suitable for most 12V and 24V systems).
• Simple twist-and-lock or bayonet replacement—no special tools required in most cars.
• Check clearance for lens housing and nearby components before final mounting.

Do I need extra parts like resistors or relays to prevent hyper-flashing?

Because these LEDs use much less power than standard incandescent bulbs, some vehicles will register a lower load and the flasher may hyper-flash or show a warning. In those cases adding a 50W 6-ohm load resistor per circuit or installing an LED-compatible flasher relay will restore correct flash rate and avoid dashboard warnings.

• Lower wattage may trigger hyper-flash on some vehicles.
• Recommended solution: 50W 6-ohm load resistor or LED flasher relay per turn-signal circuit.
• If your vehicle shows a warning, consult an installer or vehicle manual before modifying electronics.
• Contact iBrightstar support for fitment or troubleshooting help.

What performance and longevity can I expect from these switchback LEDs?

Each bulb uses high-output SMD chips and an aluminum body for efficient heat dissipation, translating into strong light output and extended service life. Rated life is up to 30,000 hours under normal use; power consumption is low (about 3.5W white, 4W amber), which helps your vehicle electrical system and reduces draw compared with halogen alternatives.

• Output roughly 300% brighter than many stock halogen bulbs.
• Service life up to 30,000 hours with constant-current regulation.
• Low power consumption: 3.5W for white, 4W for amber per bulb.
• Durable aluminum housing improves heat management and longevity.

Who is this for?

This kit is aimed at drivers who want a modern, dual-color lighting upgrade for parking lights, DRLs and turn signals without major wiring changes. It’s a good match for car and truck owners who have compatible 3157-family sockets and want clearer, brighter signaling plus a cleaner aesthetic. If your vehicle is sensitive to LED loads, plan to add load resistors or an LED flasher relay for dependable operation. For questions about fitment or additional accessories, iBrightstar customer support is available to assist.

FAQ

Q: Will these bulbs fit my 3157 socket?

A: They fit many 3157-family sockets (3157, 4157, 3155, 3457 and similar). Verify your socket and physical measurements before ordering.

Q: Do I need resistors to stop hyper-flashing?

A: Some vehicles require a 50W 6-ohm load resistor or LED flasher relay to prevent hyper-flash or dashboard warnings.