iBrightstar 1157 BAY15D Switchback LED Bulbs White/Amber — Pair with Projector Lens & Aluminium Heat-Sink

iBrightstar Switchback 1157 BAY15D LED bulbs deliver bright xenon-white for parking/DRL and clear amber for turn signals in one plug-and-play lamp.

These switchback replacement bulbs are engineered to fit common BAY15D/1157-style sockets and combine high-density SMD arrays with a projector lens and aluminum housing for boosted light output and heat management. Designed for 12V and 24V systems, the pair offers improved visibility and modernized styling while keeping installation simple for most cars, trucks and SUVs.

How do these bulbs produce both white and amber light?

Each bulb integrates two sets of LEDs and a projection lens to switch between xenon-white for parking/DRL and amber for signaling. The bulb's internal circuitry directs power to the appropriate LED cluster depending on the vehicle circuit—no manual color swapping required.

• 72 SMD 3014 LEDs for bright white output
• 4 SMD 3030 LEDs for distinct amber signaling
• Projection lens concentrates and shapes the beam
• Built-in constant-current IC for stable illumination

Will these bulbs fit my car and how hard is installation?

They are designed to match the 1157 / BAY15D / P21/5W family of sockets used by many vehicles, making them plug-and-play in compatible housings. Installation is typically straightforward: remove the factory bulb, insert the iBrightstar unit and test functions; however, confirm socket type and physical clearance before ordering.

• Compatible with 1157, BAY15D, 2057, 2357, 7528 and similar sockets
• Works with 12V and 24V electrical systems
• Simple remove-and-replace procedure for most models
• Check bulb dimensions and socket orientation first

Will my vehicle need additional parts like resistors or relays?

Because these LEDs draw less current than many factory filament bulbs, some vehicles detect the lower load and may hyper-flash, show a dashboard warning, or not flash correctly. Adding a 50W 6-ohm load resistor per circuit or using an LED-compatible flasher relay resolves most hyper-flash and bulb-out detection issues.

• Lower wattage may trigger hyper-flash on some vehicles
• 50W 6Ω load resistors or a compatible flasher relay often required
• Installation of resistors requires proper wiring and mounting to ground
• Contact iBrightstar support if uncertain which solution fits your car

How bright are these bulbs and how long will they last?

The bulbs use a combination of high-density SMD chips and an aluminum body to increase light output and manage heat for longer life. iBrightstar rates the service life up to 30,000 hours and claims output significantly higher than typical halogen parking or signal bulbs.

• 72 SMD 3014 chips + 4 SMD 3030 chips per bulb for strong output
• Aluminum housing and projector lens improve cooling and beam focus
• Built-in constant-current driver for consistent brightness
• Rated service life up to approximately 30,000 hours

Who is this for: The iBrightstar Switchback 1157 BAY15D set is aimed at drivers who want a modern, dual-color lighting upgrade for parking/DRL and turn signals without replacing housings—particularly owners of vehicles that use 1157-style sockets and who are comfortable confirming fitment and fitting resistors or a relay if needed. If you want clearer daytime presence and crisp amber signaling in a single plug-and-play bulb, this kit offers a cost-effective option with strong brightness and thermal design. For any compatibility questions, measure your socket and contact iBrightstar support before ordering.