2020-2023 Super Duty Reverse (4257 LumX-FC)

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  • Regular price $69.99

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Will NOT work on Super Dutys with OEM LED Tail Lights

Fan Cooled Technology in a replacement bulb! 

(Sold as set of 2 Bulbs)


LumX has been pushing the boundaries of what is possible when it comes to external LED bulbs. While other manufacturers focus on headlight bulbs, we're trying to create extremely bright, efficient replacement bulbs for other applications. 


The LumX FC series is the latest example of this push. We packed 50 separate EMC LED chips onto this one bulb! This creates a staggering 2000 Lumens PER BULB! This would not be possible without an efficient cooling method. For this we designed, from what we've seen, to be one of the first reverse lights with a built-in electronic fan to cool the bulb! 


There are certain applications where our normal heat sink cooled reverse light set will not work. For those applications we've created the FC series! "Fan Cooled"


This creates an extremely universal bulb that will work on any application where the socket fits! 


Bulb plugs into a circuit base? ☑️

Vehicle have blind spot monitoring? ☑️

Long as its a 4257 base, this bulb will fit ☑️



Socket Type4257

Cooling Method - LED's cooled by electric fan mounted on top of bulb

Fully Integrated CanBus - ERROR FREE (Will not cause error messages on dashboard or flicker)

Lumens - 2000 Lumens Per Bulb 

Color - 6000K Pure White (No Blue Tint)

LED Chips  - EMC-2016

Warranty - 1 Year 

Voltage - DC 9V-20V

Lifespan - 30,000 Hours


Power - 21.6~28.8W

Customer Reviews

Based on 18 reviews
Ronald Pickering
20-23 Reverse Lights F350 4257 LumX-FC

Absolutely essential upgrade for a 20-23 Super Duty, now I have no excuse when I hit my trailer backing up at night!

John Fredsall
Definitely Bright.

Install was easy and lights are way brighter than stock. My question will be to see how long they last. A little nervous about having fans in the light for life expectancy. We’ll See!

Best ever

It is literally night and day. Love these things.

William Hilton
Great replacement

Works so much better than the old stock bulbs.

Jason Crean
Reverse lights

They’re brighter than I thought they would be. I’d recommend the product