4.98
2021-24 Ford F150 Red Rear Brake/ Turn Signal LED Bulb W/ Built in Resistor No hyperflash (PAIR)
2021-24 Ford F150 Red Rear Brake/ Turn Signal LED Bulb W/ Built in Resistor No hyperflash (PAIR)
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1999-2013 Chevrolet Silverado LED Rear Turn Signal Bulbs W/ Built in Resistor No hyperflash (PAIR)
2021-24 Ford F150 Red Rear Brake/ Turn Signal LED Bulb W/ Built in Resistor No hyperflash (PAIR)
2021-24 Ford F150 Red Rear Brake/ Turn Signal LED Bulb W/ Built in Resistor No hyperflash (PAIR)
2021-24 Ford F150 Red Rear Brake/ Turn Signal LED Bulb W/ Built in Resistor No hyperflash (PAIR)
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1999-2013 Chevrolet Silverado LED Rear Turn Signal Bulbs W/ Built in Resistor No hyperflash (PAIR)
2021-24 Ford F150 Red Rear Brake/ Turn Signal LED Bulb W/ Built in Resistor No hyperflash (PAIR)
2021-24 Ford F150 Red Rear Brake/ Turn Signal LED Bulb W/ Built in Resistor No hyperflash (PAIR)
2021-24 Ford F150 Red Rear Brake/ Turn Signal LED Bulb W/ Built in Resistor No hyperflash (PAIR)
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Availability: Many in stock

2021-24 Ford F150 Red Rear Brake/ Turn Signal LED Bulb W/ Built in Resistor No hyperflash (PAIR)

  • Direct replacement bulb for Rear Brake/Parking and turn signal on 2021-2023 Ford F150
  • Full metal heatsinking for reliable operation With a built in silent Fan to cool.
  • Canbus Nonpolar and CK compatible electrical design.
  • Plug and play, simple installation, no resistors needed.
  • 1600 lumens per bulb.
  • 1 Year Warranty
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Description

Best Performance in Industry. 

Our Ultra Bright 27W 1600LM 4257 WT21 p27/7w RED LED W/ Built-in Resistors Brake/Parking and turn signal, No hyper flash (2 Pieces) are Red colored type LED lights that cover 360 degrees to provide maximum output. Unlike other brands, with resistors on both the filament, we created a CANBUS LED that only has a built-in resistor only on the turn signal filament. Having a resistor on both the filament will lead to melting the housing or the LED falling apart in the housing. We even took it one step future to insure the longevity of the bulbs by adding a cooling fan. The fan only turns on when the high filament is engaged, to reduce heat when resistor is on.  Our Design protects the LED from being exposed to constant heat eliminating this issue. This assures no hyper-flashing or error codes. Our LED is designed to replace the factory incandescent bulb without the need to add extra resistors or parts.

Best-In-Class Brightness. 

Each LED is equipped with 12 1860 LEDs RED Colored type LED lights 360 degrees to provide the max output. Each bulbs is 1200Lm, your turn signals will shine a lot brighter than the stock incandescent bulb.

You’ll be hard-pressed to find a brighter, more efficient LED bulb on the market! Designed here in the USA, these bulbs feature an impressive 12 red color LED chip design.

Installation

Difficulty Level: Beginner - Simple Installation for anyone.

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

Please note: There are two bulbs in each taillight so you will want to buy two sets. Except for the STX models and the 2024 models only needs 1 set for brake 
[tabs][tab title="Warranty"] This products come with a 1 year warranty. [/tab][/tabs]

    Warranty

    This products come with a 1 year warranty.

    FAQs

    Frequently Asked Questions on LEDs


    Will LED Bulbs Damage My Car?

    No. LEDs will not damage your vehicle if properly installed. In addition, you want to purchase the correct LED light that will fit your car. For example, if your vehicle has a CANbus system, you want to buy the right product and install it correctly to avoid any potential issues.

    If your car was not originally designed for LED Bulbs, you can purchase a LED bulb and install them. They are safe and will not damage your vehicle as long as you buy top-quality products.

    Why Are LED Lights Better?

    An LED light bulb saves more energy, produces less heat, and has more light. In addition, it uses 85% less electricity than standard lighting. It is also a lower-cost product but has bright light with a longer life span.

    LED light is different from incandescent light. Blue LED combined with yellow phosphor creates white light. The high efficiency of LED light makes it a popular choice.

    What Is the Lifespan of LEDs?

    LEDs have a long life span. When an LED is operating at 70% capacity, it has reached the end of its life span.

    Incandescent bulbs have around 750 to 2,000 hours of light. In comparison, LED bulbs can have 50,000 to 100,000 hours of light, making them better investments.

    Can I Replace Incandescent Bulbs with LED in My Car?

    Yes! You can change your initial bulbs to LED in your vehicle. In addition, there are different places where you might want to swap out for LED lights. For example, you can change your headlights, rear license plate lights, interior door entry lights, rear brake lights, and more.

    First, however, you need to inspect what type of bulb you need. There are different bulbs with various designs, so you must buy the right one to fit.

    Second, different areas of your car may require special tools or specific parts to work properly. Once you have found the products you need, you’re ready to go LED.

    Frequently Asked Questions about Turn Signal LED Bulbs (FAQ's)


    Which color LED is best to install in my red lens taillight?  

    Red LED is the best option to put in a taillight with a red lens. Red will give you a nice deep bright red color. Where white would make the light output look like a soft pink. 


    My rear Brake light is also my parking light and turn signal will your LED work for all 3 functions?

    Yes, as long as you buy the correct part number our led bulb will do all the same functions that your OEM bulb did.


     Are LED light bulbs good for eyes? 

    Many people worry that the increased brightness of LED headlight bulbs will result in a shine that is too bright for others on the road. However, we feature lights that are specially designed to focus light in a way that will not blind oncoming traffic. Your Red LED lights from Underground Lighting contain the perfect balance of brightness, style, and safety on the road.

    What is hyper flash and what causes hyper flash?

    Hyper flash is where the turn signals or indicators on a vehicle blink at a much faster rate than normal. This can be caused by several factors:

    • Bulb Failure: The most common cause of hyper flash is a burnt-out or malfunctioning bulb in one of the turn signals or hazard lights. When one of these bulbs fails, the system detects a lower load on the circuit and increases the flash rate as a warning to the driver.
    • Installing an LED Bulb: When replacing traditional incandescent bulbs with LED bulbs in vehicles that were not designed for LEDs, you might experience hyper flash. LED bulbs use less power, and the vehicle's flasher relay may interpret this as a burnt-out bulb.
    • Faulty Flasher Relay: The flasher relay is responsible for controlling the rate of blinking of the turn signals. If it malfunctions, it can cause hyper flashing or erratic blinking. Replacing a faulty flasher relay can resolve this issue.
    • Wiring Issues: Damaged or corroded wiring can disrupt the electrical flow in the turn signal circuit, affecting the flash rate.
    • Incorrect Bulb Type: If the wrong type of bulb is installed, it can draw too much or too little power, leading to hyper flash.
    • Resistance Issues: Some vehicles use a variable load sensing flasher relay, which can detect changes in resistance. When adding additional lights or modifying the wiring, you might change the resistance in the circuit, causing hyper flash.

    Why do I have hyper flash on the dash after installing LED turn signal bulbs?

    LED bulbs draw a lot less power and current making the Body Control Module think the bulb is out.


    Why do I still have hyper flash after Installing Underground Lighting LED turn signal with built in Resistors?

    The most common reason is basic mistake many make. Make sure you start the vehicle and let the engine run before testing your turn signal for hyper flash. Starting the engine turns on the BCM so the computer can see the resistance in the bulb.

    Do I need to have Underground Lighting Led turn signals in the front and rear to not have hyper flash issues? 

    The short answer is no, you don’t. However, you need to have resistors on every turn signal bulb that doesn’t have resisters built in. The front and rear turn signals are tied together so you can not have resistors in the front and not the rear for example if both front and rear are LEDs.


    To find more questions and answers, please visit our FAQ Page.

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    PRODUCT SPECS

    WHAT'S INCLUDED

    BULBS:
    2X RED Canbus LEDs With built in resistors
    WARRANTY:
    1 Year

    COMPATIBILITY

    CROSS-COMPATIBILITY:
    4257, p27/7w, WT21
    FITMENTS:
    Rear Turn Signal For 2021-2022 Ford F150
    CIRCUITS:
    12V
    BLINKER CIRCUITS:
    No Resistors Required

    TECH SPECS

    WATTAGE:
    24W
    LENGTH:
    2.13In/ 54MM
    DIAMETER:
    .81In/ 20.5MM
    INTENSITY:
    1200lm
    3000k
    6000k
    White
    8000k
    10000k
    30k
    amber
    Blue
    Red
    Green
    White
    Amber White
    Amber and white Switchback
    Amber Green
    Red Blue
    Red White

    Customer Reviews

    Based on 61 reviews
    98%
    (60)
    2%
    (1)
    0%
    (0)
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    Reviewer avatar
    Kevin
    Awesome lights

    Love these red LEDs for my 2022 F150. I'm liking the updated version too from the ones I bought back in 2022/2023. (Still work) I wanted extras on hand and noticed these are much brighter which is awesome! Definitely recommend them to anyone looking to upgrade over stock halogen bulbs.

    J
    Jordan Machado
    Look no further

    These lights are amazing!

    S
    Steven Poche
    Great Service and Great product!

    These lights are great and the customer service is unmatched! They know their stuff and will answer any questions you have and help you!

    G
    Gary Helscel
    Taillight and front signal bulbs.

    What a difference. Very happy with the bulbs for sure.

    K
    Kenneth Hosfeld

    Super bright no hyper flash no issues
    Great fit