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2019-2022 Ford F150 Amber Front Turn Signal LED Bulb W/ Built in Resistor No hyperflash (PAIR) LEDS Underground Lighting
2019-2022 Ford F150 Amber Front Turn Signal LED Bulb W/ Built in Resistor No hyperflash (PAIR) LEDS Underground Lighting
2019-2022 Ford F150 Amber Front Turn Signal LED Bulb W/ Built in Resistor No hyperflash (PAIR) LEDS Underground Lighting
2019-2022 Ford F150 Amber Front Turn Signal LED Bulb W/ Built in Resistor No hyperflash (PAIR) LEDS Underground Lighting
2019-2022 Ford F150 Amber Front Turn Signal LED Bulb W/ Built in Resistor No hyperflash (PAIR) LEDS Underground Lighting
2019-2022 Ford F150 Amber Front Turn Signal LED Bulb W/ Built in Resistor No hyperflash (PAIR) LEDS Underground Lighting
2020-2023 Ford F150 Amber Front Turn Signal LED Bulb W/ Built in Resistor No hyperflash (PAIR)
Availability: Many in stock

2020-2023 Ford F150 Amber Front Turn Signal LED Bulb W/ Built in Resistor No hyperflash (PAIR)

  • Direct replacement bulb for Front turn signal on 2020-2023 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.
  • 1200 lumens per bulb.
  • 1 Year Warranty
$ 59.99 $ 69.99 $ 69.99 /


Best Performance in Industry. 

Our Ultra Bright 24W 1200LM Wt21 4257 Amber LED W/ Built-in Resistors DRL and/or Turn Signal Light Bulbs, No hyper flash (2 Pieces) are amber 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 turn signal is on, 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 54 SMD LEDs Amber 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 54 amber color LED chip design.


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. 

 [tabs][tab title="Warranty"] This products come with a 1 year warranty. [/tab][/tabs]


    This products come with a 1 year warranty.


    Frequently Asked Questions on LED Turn signals

    Do turn signal bulbs have to be Amber? 

    Yes, your turn signal bulb needs to alert other drivers on the road with a flashing red/amber light from the rear for maximum safety and consistency purposes. Front-end bulbs must project a white or amber flashing light, as well, to comply with federal regulations. Whichever model you choose, you can rest assured that your amber bulb from Underground Lighting will shine brightly even in the most inclement or low-visibility weather conditions. Call, chat, or email us today and let us help you find the right pick for your car or truck.

    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?

    Make sure you start the vehicle and let the engine run before testing your turn signal for hyper flash.

    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.

    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 Purpose of LED Lights?

    LED lights are used as a light source in our homes, devices, and vehicles. LED (light-emitting diode) lights use gallium compounds such as gallium arsenide and aluminum gallium. LED emits light by combining a P-type semiconductor with an N-type semiconductor. Once a voltage is applied, they release energy into light.

    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.

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    2X Amber Canbus LEDs With built in resistors
    1 Year


    4257, jl3z13466a
    Front Turn Signal For 2019-2021 Ford F150
    No Resistors Required


    2.13In/ 54MM
    .81In/ 20.5MM
    Amber White
    Amber and white Switchback
    Amber Green
    Red Blue
    Red White

    Customer Reviews

    Based on 63 reviews
    Ian Scribner

    Easy install

    Steven Franklin
    Hyper flash

    Bulbs are advertised as no hyper flash but will absolutely cause a random hyper flash. And yes all bulbs are pushed completely into the socket.
    Vendor sent a different bulb and fixed the issue.
    Great customer service.

    Jason Hutchins
    Very nice upgrade…..but

    I love these bulbs first of all. However the tail/brake lights aren’t as bright as I hoped, although they are brighter than stock and the color is more clean and modern. They are blinding from the side, but not as much looking straight on from the rear. Personally, I feel that isn’t the bulbs fault because they are SUPER bright. I feel it more of the limitations of the tail light housings not allowing the bulbs to project as well as ones designed for LED’s. The front turn signals are BLINDING! Funny enough I do get sporadic hyper flash but only with the lane change signal. Overall they are a super nice upgrade to stock and I would certainly recommend them.

    HI, Make sure you push the bulb all the way into the socket. The leds are a lor brighter than stock bulbs. Running light will be dimmer than the brake/turn signal.

    Lawrence Chapman
    Great upgrade

    Super easy plug and play, much more visible now

    David Poretta
    Works great

    I got these to replace a set of a competitorLED bulbs that claimed to be hyperflash free…. They weren’t. These worked great!