2021–2025 Ford F-150 4257 Red LED Rear Brake & Turn Signal Replacement Bulbs for 3X Visibility | 300% Brighter 1600LM (PAIR) | Built-in Resistor, No Hyperflash

Why This Bulb Beats Everything Else

 - Brake lights compete with sunlight, rain, and surrounding vehicles. Halogen bulbs output ~300–400 lumens, limiting visibility, whereas 1600-lumen LED output improves detection distance, helping following drivers react faster.

- 12 high-power LEDs produce 1600 lumens across a 360° beam angle, ensuring visibility from rear and side angles. This improves braking awareness, lane-change signalling, and collision prevention.

- Dual-intensity 4257 design supports brake, turn, and parking functions, switching between low and high output instantly ensuring clear signal separation and faster driver recognition.

- LED bulbs draw lower current than halogen bulbs, triggering rapid blinking. Built-in resistor simulates factory load (~60–120 flashes/min), restoring correct flash rate without external resistors.

- Excess heat reduces LED efficiency and lifespan. The fan + metal heatsink system regulates temperature, maintaining stable brightness output and extending lifespan up to 10× longer than halogen bulbs.

- Designed in the USA and built with Japanese components, ensuring durability and precision. Improved thermal and electrical stability delivers consistent 1600-lumen output and long-term reliability.

- Installation time is approximately 10 minutes. There is no need for slicing or complicated wiring. This light is a plug-and-play installation and operation, optimize. 

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Do you have questions about the application, installation, shipping, warranty, or more? Do not hesitate to reach out to Underground Lighting and talk to a specialist. Chat with us online by hitting the chat button or call us at (561) 918-5225. We are here to help! 

Also, check our full collection of Turn signal bulb.