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WT21W/7W LED Bulbs Turn Signal, Brake Tail Lights WT21 Wedge Lamp

4257 4257NA LED Switchback Bulbs Turn Signal Lights White/Yellow 


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Item #: 16799219

6000K Xenon WhitePure Red
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About this item

WT21 wedge WT21/7W LED bulbs, rear turn signal lights, brake tail lights lamps replacement bulbs upgrade OEM halogen, incandescent or damaged blinker lamps for 2020-2022 Ford F-150, F-250 super duty, F-350 super duty, Maverick, etc..

Extra load resistors maybe required to avoid the signal hyper flash or error code.

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Polarity Sensitive

CK Compatible ?

Strobe ?

Optional Colors

Performance super bright WT21 wedge WT21W/7W LED bulbs, rear turn signal lights, brake tail lights, side marker lights replacement bulbs upgrade OEM halogen, incandescent or damaged blinker lamps for 2019-2021 Ford F-150, F-250 super duty, F-350 super duty, 2022 Ford Marverick, etc.

Specs of WT21W/7W LED Turn Signal Lights Replacement Bulbs

  • Features

  • Packages: Includes one pair (2pcs) 5730-SMD WT21W/7W LED bulbs, super bright 12V dual filament brake tail, turn signal lights replacement for auto cars, trucks, motorcycles like 2019-2021 Ford F-150, F-250 Super Duty, F-350 Super Duty, Maverick, etc. 
    • FeaturesEquipped with US made IC and capacitors to make it better light performance and current control for longer lifespan.
  • LED Chips: Each WT21W/7W LED bulb is equipped with 336pcs high power and high illumination 5730 SMD chipsets.
  • Easy fitment: WT21 wedge dual fitment bulb, for some vehicles, extra load resistors maybe required to avoid the  hyper flash or error code.
  • Light Output: Each WT21W/7W LED turn signal lights bulb light up to 1400 lumens, total 2800 lumens for both WT21W/7W LED bulbs
  • Color Options: 6000K xenon white/pure red
  • Cross reference number: WT21W/7W, WT21-7W, WTY21W/7W, etc.
  • Applications: Used for replacing halogen/incandescent or damaged turn signal, brake tail, side marker lights lamps for better vision and safer driving.
  • Lifespan: More than 30,000hrs in 25°C ambient. 
  • Specifications

Raw Lumens


Optional Colors

6000K White/pure red

Base Type

WZX3 x 16q

CAN Bus ?




Beam Angle

360 degree

Current Draw

0.7A (708mA)

Power Consumption


Operating Voltage

9V~18.8 VDC


Polarity Sensitive




Standard & CK Compatible ?




Life Span

30, 000 hours


12 Months

LED Chip Type

High illumination 5730 SMD

LED Quantity

33pcs LEDS

Operating Temperature

-20~+40 °C (-4~+104 °F)

Cross Reference Number

WT21W/7W, WT21-7W

  • Warranty

Alla Lighting warrants that its LED Conversion Kits will be free from defects in material and workmanship for ONE year from the date of purchase by the Original Purchaser. This warranty does not apply to any products that have been subjected to misuse, mishandling, misapplication, neglect (including but not limited to improper maintenance), improper installation, act of nature, motor vehicle accidents or alterations.

For more details, please click here.

  • Package


  • One pair (2 pieces) 5730-SMD WT21W/7W LED bulbs
  • Well packed in solid box
  • Shipping

Domestic (U.S.) Shipping

All domestic (U.S.) orders ship with USPS, and all orders will be shipped out within 24 working hours (except out of stock items), Free standard shipping.

All Orders will be shipped out within 24 working hours.

International Orders maybe charged customs clearance.

More details, please click here.

  • Vehicle Fitment

Check whether this bulb can fit your vehicle or not, check Bulb Size Guide for more details, please input your vehicle's Make, Year, Model, Qualifier, Applications to fast locate products options.

  • Accessories

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Customer Reviews

Based on 1 review
Dan M. (United States)
Vehicle's information: 2023 Ford Maverick
Bright Light

These are beautiful and bright! Switchbacks on the front, Alla reds on back. I’ve got hyper flashing inside the truck at times, but outside, they’re all flashing at perfect speed.

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