Add dual-color functionality and a modern appearance to your front turn signals with the 4257 HP24 turn signal bulb. This bulb lights up white when your headlights are turned on and flashes amber when the turn signals are activated.

Features

  • True replacement for factory incandescent 4257-size front turn signal bulb.
  • Custom-molded base connector for correct fitment.
  • Adds cool white running light along with amber turn signal.
  • High-power Samsung LEDs arranged around the bulb.
  • No yellow appearance when switched off.
  • Non-polar and CK compatible.
  • Plug and play simple installation.

Overview

Upgrade. Add dual-color functionality and a modern appearance to your front turn signals with the 4257 HP24 turn signal bulb. Populated with sixteen amber chips and eight white chips this bulb lights up white when your headlights are turned on and flashes amber when the turn signals are activated. Housed in an aluminum casing for maximum heatsinking properties the HP24 will last for years to come. Best of all installation only takes minutes - simply take out your factory bulb and the HP24 will fit snugly in the socket.

The 4257 HP24 Switchback bulb features a custom-molded base connector making it a true replacement for factory incandescent 4257-size front turn signal bulbs. Unlike a 3157 bulb that includes tabs on either side of the bulb a 4257 bulb does not. The 4257 HP24 Switchback bulb is compatible with Ford vehicles using a dual-filament 4257-size front turn signal bulb with a clear reflector lens.

Brightness. At 410 lumens the HP24 will provide about double the total light output compared to your factory bulb. All Diode Dynamics LED lighting is rated with accurate measured lumen figures not calculations or guesses. We test the true output in-house and provide you the real numbers to compare.

Reliability. Unlike other bulbs on the market this bulb is built with constant-current circuitry along with transient suppression meaning this bulb will last for years to come.

  • Direct replacement for your factory bulb
  • Molded construction with sturdy double terminals
  • Increased output with LED Appearance
  • Plug and play simple installation

Information:

Included Quantity: Two (2)

Application Summary:

Year Make/Model
2015-2023 Ford F-150
2008-2024 Ford F-250 Super Duty
2008-2024 Ford F-350 Super Duty
2008-2024 Ford F-450 Super Duty
2008-2024 Ford F-550 Super Duty
2022-2025 Ford Maverick
Attributes
Add-On N/A, N/A
Average Rated Life Information Not Available, Information Not Available
Bulb Base Type 4257, 4257
Bulb Color Switchback, Switchback
Bulb Finish Clear, Clear
Bulb Material Plastic, Plastic
Bulb Technology LED, LED
Bulb Type LED, LED
California Proposition 65 Yes
Color Rendering Index (CRI) Information Not Available
Country of Origin (Primary) CN
Department of Transportation Approved Yes
DOT Approved Yes
Filament Quantity 1, 1
Filament Type LED, LED
Hazardous Material Code N
Input Power (watts) 6.48, 6.48
Life Cycle Status Code Available to Order
Measured Output (lumens) 410 lm, 410 lm
Operating Temperature -40C to 85C (-40F to 185F), -40C to 85C (-40F to 185F)
SDR Required Flag N
Secondary Filament Type No Secondary Filament, No Secondary Filament
Secondary Voltage No Secondary Voltage, No Secondary Voltage
Street Legal Yes, Yes
Voltage 9-16V, 9-16V
Warranty Time 3
GTIN 00691026128603

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