4257 LED Front Turn Signal Bulbs with White-to-Amber Switchback Lighting and Built-In Decoder, 2-Pack
4257 LED Front Turn Signal Bulbs with White-to-Amber Switchback Lighting and Built-In Decoder, 2-Pack
4257 LED turn signal bulbs combine white parking lights and amber turn signals in a single switchback design. This two-bulb pack provides 6000K white light for parking and 3000K amber light when signaling, giving compatible front light assemblies both functions from the same bulb.
Lasfit T3 bulbs integrate a CanBus decoder and ceramic resistor to simplify installation without separate external resistors. Each bulb uses 20 high-intensity 3030 LED chips, while an aluminum body, eight heat dissipation holes and temperature control help manage heat during operation.
Features
- Switchback operation combines white parking light and amber turn signaling.
- Built-in CanBus decoder and ceramic resistor avoid separate external resistor installation.
- Each bulb contains 16 amber LED chips and four white LED chips.
- Maximum output is 2000 lumens and 24W per bulb.
- Aluminum body incorporates eight heat dissipation holes and a temperature control chip.
Specifications
- Model: T3-4257D
- Package contents: 2 bulbs
- Installation position: Front turn signal light
- Bulb size references: 4257 / 4257NA / 4257NALL / 4257A
- Parking light color temperature: 6000K white
- Turn signal color temperature: 3000K amber
- Maximum power: 24W per bulb
- Maximum light output: 2000 lumens per bulb
- LED chips per bulb: 20 × 3030 SMD LEDs: 16 amber and 4 white
- Body material: Aluminum
- Decoder: Built-in CanBus decoder
- Resistor: Built-in ceramic resistor
Frequently Asked Questions
What colors do these 4257 switchback bulbs produce?
These 4257 switchback bulbs produce 6000K white light for parking and 3000K amber light for turn signals, combining both functions in one bulb.
How many bulbs are included?
The T3-4257D package includes two LED bulbs for front turn signal use.
Do these bulbs need separate external resistors?
These T3 bulbs include a built-in CanBus decoder and ceramic resistor, so the design does not require separate external resistors. Confirm compatibility with your vehicle's lighting system before installation.
How do I check whether these bulbs fit my vehicle?
Check that your front turn signal application uses a compatible 4257 bulb fitting and supports white parking light and amber turn signal operation. Match the existing bulb and light assembly before ordering.